Reaction kinetic studies of strontium hexaferrite nanoparticles synthesized by co-precipitation method

Abstract Nano crystalline strontium hexaferrite, $ SrFe_{12} %$ O_{19} $ powders have been synthesized using co-precipitation method. The ferrite precursors were obtained from aqueous mixtures of strontium chloride and ferric chloride by precipitating strontium and iron using 7.5 M sodium hydroxide...
Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Tyagi, Sachin [verfasserIn] Agarwala, R. C. [verfasserIn] Agarwala, Vijaya [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2010

Schlagwörter:	nucleation avrami index activation energy

Übergeordnetes Werk:	Enthalten in: Transactions of the Indian Institute of Metals - [New Delhi] : Springer India, 2008, 63(2010), 1 vom: Feb., Seite 15-19
Übergeordnetes Werk:	volume:63 ; year:2010 ; number:1 ; month:02 ; pages:15-19

Links:	Volltext

DOI / URN:	10.1007/s12666-010-0003-3

Katalog-ID:	SPR026761106

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520			\|a Abstract Nano crystalline strontium hexaferrite, $ SrFe_{12} %$ O_{19} $ powders have been synthesized using co-precipitation method. The ferrite precursors were obtained from aqueous mixtures of strontium chloride and ferric chloride by precipitating strontium and iron using 7.5 M sodium hydroxide solution. These precursors were heat treated at 800 and 1200°C in nitrogen atmosphere. The decomposition behaviour and reaction kinetics were investigated by means of DSC/DTG/TG for three heating rates. The various phases associated therein were identified by X-ray diffraction (XRD). From field emission scanning electron microscopy (FESEM) study, the formations of nonporous ultrafine particles have been confirmed. About 5 to 10% of the needle like crystals in the ‘as synthesized, condition were transformed to pyramidal structure and most of the crystals are found to have plate like hexagonal structures with increase in heat treatment temperatures. Activation energies and Avrami index ‘n’ were obtained using Johnson-Mehl-Avrami (JMA) equation. The reaction in the temperature range of 800 to 1200°C, proceeds as, instantaneous nucleation and three dimensional growth with activation energy of 168.33 kJ/mole.
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912			\|a GBV_ILN_120
912			\|a GBV_ILN_138
912			\|a GBV_ILN_150
912			\|a GBV_ILN_151
912			\|a GBV_ILN_161
912			\|a GBV_ILN_170
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912			\|a GBV_ILN_187
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912			\|a GBV_ILN_2113
912			\|a GBV_ILN_2116
912			\|a GBV_ILN_2118
912			\|a GBV_ILN_2119
912			\|a GBV_ILN_2122
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publishDate	2010
allfields	10.1007/s12666-010-0003-3 doi (DE-627)SPR026761106 (SPR)s12666-010-0003-3-e DE-627 ger DE-627 rakwb eng 620 660 670 ASE Tyagi, Sachin verfasserin aut Reaction kinetic studies of strontium hexaferrite nanoparticles synthesized by co-precipitation method 2010 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Nano crystalline strontium hexaferrite, $ SrFe_{12} %$ O_{19} $ powders have been synthesized using co-precipitation method. The ferrite precursors were obtained from aqueous mixtures of strontium chloride and ferric chloride by precipitating strontium and iron using 7.5 M sodium hydroxide solution. These precursors were heat treated at 800 and 1200°C in nitrogen atmosphere. The decomposition behaviour and reaction kinetics were investigated by means of DSC/DTG/TG for three heating rates. The various phases associated therein were identified by X-ray diffraction (XRD). From field emission scanning electron microscopy (FESEM) study, the formations of nonporous ultrafine particles have been confirmed. About 5 to 10% of the needle like crystals in the ‘as synthesized, condition were transformed to pyramidal structure and most of the crystals are found to have plate like hexagonal structures with increase in heat treatment temperatures. Activation energies and Avrami index ‘n’ were obtained using Johnson-Mehl-Avrami (JMA) equation. The reaction in the temperature range of 800 to 1200°C, proceeds as, instantaneous nucleation and three dimensional growth with activation energy of 168.33 kJ/mole. nucleation (dpeaa)DE-He213 avrami index (dpeaa)DE-He213 activation energy (dpeaa)DE-He213 Agarwala, R. C. verfasserin aut Agarwala, Vijaya verfasserin aut Enthalten in Transactions of the Indian Institute of Metals [New Delhi] : Springer India, 2008 63(2010), 1 vom: Feb., Seite 15-19 (DE-627)617807884 (DE-600)2535335-4 0975-1645 nnns volume:63 year:2010 number:1 month:02 pages:15-19 https://dx.doi.org/10.1007/s12666-010-0003-3 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 63 2010 1 02 15-19
spelling	10.1007/s12666-010-0003-3 doi (DE-627)SPR026761106 (SPR)s12666-010-0003-3-e DE-627 ger DE-627 rakwb eng 620 660 670 ASE Tyagi, Sachin verfasserin aut Reaction kinetic studies of strontium hexaferrite nanoparticles synthesized by co-precipitation method 2010 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Nano crystalline strontium hexaferrite, $ SrFe_{12} %$ O_{19} $ powders have been synthesized using co-precipitation method. The ferrite precursors were obtained from aqueous mixtures of strontium chloride and ferric chloride by precipitating strontium and iron using 7.5 M sodium hydroxide solution. These precursors were heat treated at 800 and 1200°C in nitrogen atmosphere. The decomposition behaviour and reaction kinetics were investigated by means of DSC/DTG/TG for three heating rates. The various phases associated therein were identified by X-ray diffraction (XRD). From field emission scanning electron microscopy (FESEM) study, the formations of nonporous ultrafine particles have been confirmed. About 5 to 10% of the needle like crystals in the ‘as synthesized, condition were transformed to pyramidal structure and most of the crystals are found to have plate like hexagonal structures with increase in heat treatment temperatures. Activation energies and Avrami index ‘n’ were obtained using Johnson-Mehl-Avrami (JMA) equation. The reaction in the temperature range of 800 to 1200°C, proceeds as, instantaneous nucleation and three dimensional growth with activation energy of 168.33 kJ/mole. nucleation (dpeaa)DE-He213 avrami index (dpeaa)DE-He213 activation energy (dpeaa)DE-He213 Agarwala, R. C. verfasserin aut Agarwala, Vijaya verfasserin aut Enthalten in Transactions of the Indian Institute of Metals [New Delhi] : Springer India, 2008 63(2010), 1 vom: Feb., Seite 15-19 (DE-627)617807884 (DE-600)2535335-4 0975-1645 nnns volume:63 year:2010 number:1 month:02 pages:15-19 https://dx.doi.org/10.1007/s12666-010-0003-3 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 63 2010 1 02 15-19
allfields_unstemmed	10.1007/s12666-010-0003-3 doi (DE-627)SPR026761106 (SPR)s12666-010-0003-3-e DE-627 ger DE-627 rakwb eng 620 660 670 ASE Tyagi, Sachin verfasserin aut Reaction kinetic studies of strontium hexaferrite nanoparticles synthesized by co-precipitation method 2010 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Nano crystalline strontium hexaferrite, $ SrFe_{12} %$ O_{19} $ powders have been synthesized using co-precipitation method. The ferrite precursors were obtained from aqueous mixtures of strontium chloride and ferric chloride by precipitating strontium and iron using 7.5 M sodium hydroxide solution. These precursors were heat treated at 800 and 1200°C in nitrogen atmosphere. The decomposition behaviour and reaction kinetics were investigated by means of DSC/DTG/TG for three heating rates. The various phases associated therein were identified by X-ray diffraction (XRD). From field emission scanning electron microscopy (FESEM) study, the formations of nonporous ultrafine particles have been confirmed. About 5 to 10% of the needle like crystals in the ‘as synthesized, condition were transformed to pyramidal structure and most of the crystals are found to have plate like hexagonal structures with increase in heat treatment temperatures. Activation energies and Avrami index ‘n’ were obtained using Johnson-Mehl-Avrami (JMA) equation. The reaction in the temperature range of 800 to 1200°C, proceeds as, instantaneous nucleation and three dimensional growth with activation energy of 168.33 kJ/mole. nucleation (dpeaa)DE-He213 avrami index (dpeaa)DE-He213 activation energy (dpeaa)DE-He213 Agarwala, R. C. verfasserin aut Agarwala, Vijaya verfasserin aut Enthalten in Transactions of the Indian Institute of Metals [New Delhi] : Springer India, 2008 63(2010), 1 vom: Feb., Seite 15-19 (DE-627)617807884 (DE-600)2535335-4 0975-1645 nnns volume:63 year:2010 number:1 month:02 pages:15-19 https://dx.doi.org/10.1007/s12666-010-0003-3 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 63 2010 1 02 15-19
allfieldsGer	10.1007/s12666-010-0003-3 doi (DE-627)SPR026761106 (SPR)s12666-010-0003-3-e DE-627 ger DE-627 rakwb eng 620 660 670 ASE Tyagi, Sachin verfasserin aut Reaction kinetic studies of strontium hexaferrite nanoparticles synthesized by co-precipitation method 2010 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Nano crystalline strontium hexaferrite, $ SrFe_{12} %$ O_{19} $ powders have been synthesized using co-precipitation method. The ferrite precursors were obtained from aqueous mixtures of strontium chloride and ferric chloride by precipitating strontium and iron using 7.5 M sodium hydroxide solution. These precursors were heat treated at 800 and 1200°C in nitrogen atmosphere. The decomposition behaviour and reaction kinetics were investigated by means of DSC/DTG/TG for three heating rates. The various phases associated therein were identified by X-ray diffraction (XRD). From field emission scanning electron microscopy (FESEM) study, the formations of nonporous ultrafine particles have been confirmed. About 5 to 10% of the needle like crystals in the ‘as synthesized, condition were transformed to pyramidal structure and most of the crystals are found to have plate like hexagonal structures with increase in heat treatment temperatures. Activation energies and Avrami index ‘n’ were obtained using Johnson-Mehl-Avrami (JMA) equation. The reaction in the temperature range of 800 to 1200°C, proceeds as, instantaneous nucleation and three dimensional growth with activation energy of 168.33 kJ/mole. nucleation (dpeaa)DE-He213 avrami index (dpeaa)DE-He213 activation energy (dpeaa)DE-He213 Agarwala, R. C. verfasserin aut Agarwala, Vijaya verfasserin aut Enthalten in Transactions of the Indian Institute of Metals [New Delhi] : Springer India, 2008 63(2010), 1 vom: Feb., Seite 15-19 (DE-627)617807884 (DE-600)2535335-4 0975-1645 nnns volume:63 year:2010 number:1 month:02 pages:15-19 https://dx.doi.org/10.1007/s12666-010-0003-3 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 63 2010 1 02 15-19
allfieldsSound	10.1007/s12666-010-0003-3 doi (DE-627)SPR026761106 (SPR)s12666-010-0003-3-e DE-627 ger DE-627 rakwb eng 620 660 670 ASE Tyagi, Sachin verfasserin aut Reaction kinetic studies of strontium hexaferrite nanoparticles synthesized by co-precipitation method 2010 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Nano crystalline strontium hexaferrite, $ SrFe_{12} %$ O_{19} $ powders have been synthesized using co-precipitation method. The ferrite precursors were obtained from aqueous mixtures of strontium chloride and ferric chloride by precipitating strontium and iron using 7.5 M sodium hydroxide solution. These precursors were heat treated at 800 and 1200°C in nitrogen atmosphere. The decomposition behaviour and reaction kinetics were investigated by means of DSC/DTG/TG for three heating rates. The various phases associated therein were identified by X-ray diffraction (XRD). From field emission scanning electron microscopy (FESEM) study, the formations of nonporous ultrafine particles have been confirmed. About 5 to 10% of the needle like crystals in the ‘as synthesized, condition were transformed to pyramidal structure and most of the crystals are found to have plate like hexagonal structures with increase in heat treatment temperatures. Activation energies and Avrami index ‘n’ were obtained using Johnson-Mehl-Avrami (JMA) equation. The reaction in the temperature range of 800 to 1200°C, proceeds as, instantaneous nucleation and three dimensional growth with activation energy of 168.33 kJ/mole. nucleation (dpeaa)DE-He213 avrami index (dpeaa)DE-He213 activation energy (dpeaa)DE-He213 Agarwala, R. C. verfasserin aut Agarwala, Vijaya verfasserin aut Enthalten in Transactions of the Indian Institute of Metals [New Delhi] : Springer India, 2008 63(2010), 1 vom: Feb., Seite 15-19 (DE-627)617807884 (DE-600)2535335-4 0975-1645 nnns volume:63 year:2010 number:1 month:02 pages:15-19 https://dx.doi.org/10.1007/s12666-010-0003-3 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 63 2010 1 02 15-19
language	English
source	Enthalten in Transactions of the Indian Institute of Metals 63(2010), 1 vom: Feb., Seite 15-19 volume:63 year:2010 number:1 month:02 pages:15-19
sourceStr	Enthalten in Transactions of the Indian Institute of Metals 63(2010), 1 vom: Feb., Seite 15-19 volume:63 year:2010 number:1 month:02 pages:15-19
format_phy_str_mv	Article
institution	findex.gbv.de
topic_facet	nucleation avrami index activation energy
dewey-raw	620
isfreeaccess_bool	false
container_title	Transactions of the Indian Institute of Metals
authorswithroles_txt_mv	Tyagi, Sachin @@aut@@ Agarwala, R. C. @@aut@@ Agarwala, Vijaya @@aut@@
publishDateDaySort_date	2010-02-01T00:00:00Z
hierarchy_top_id	617807884
dewey-sort	3620
id	SPR026761106
language_de	englisch
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author	Tyagi, Sachin
spellingShingle	Tyagi, Sachin ddc 620 misc nucleation misc avrami index misc activation energy Reaction kinetic studies of strontium hexaferrite nanoparticles synthesized by co-precipitation method
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topic_title	620 660 670 ASE Reaction kinetic studies of strontium hexaferrite nanoparticles synthesized by co-precipitation method nucleation (dpeaa)DE-He213 avrami index (dpeaa)DE-He213 activation energy (dpeaa)DE-He213
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title	Reaction kinetic studies of strontium hexaferrite nanoparticles synthesized by co-precipitation method
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title_full	Reaction kinetic studies of strontium hexaferrite nanoparticles synthesized by co-precipitation method
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title_sort	reaction kinetic studies of strontium hexaferrite nanoparticles synthesized by co-precipitation method
title_auth	Reaction kinetic studies of strontium hexaferrite nanoparticles synthesized by co-precipitation method
abstract	Abstract Nano crystalline strontium hexaferrite, $ SrFe_{12} %$ O_{19} $ powders have been synthesized using co-precipitation method. The ferrite precursors were obtained from aqueous mixtures of strontium chloride and ferric chloride by precipitating strontium and iron using 7.5 M sodium hydroxide solution. These precursors were heat treated at 800 and 1200°C in nitrogen atmosphere. The decomposition behaviour and reaction kinetics were investigated by means of DSC/DTG/TG for three heating rates. The various phases associated therein were identified by X-ray diffraction (XRD). From field emission scanning electron microscopy (FESEM) study, the formations of nonporous ultrafine particles have been confirmed. About 5 to 10% of the needle like crystals in the ‘as synthesized, condition were transformed to pyramidal structure and most of the crystals are found to have plate like hexagonal structures with increase in heat treatment temperatures. Activation energies and Avrami index ‘n’ were obtained using Johnson-Mehl-Avrami (JMA) equation. The reaction in the temperature range of 800 to 1200°C, proceeds as, instantaneous nucleation and three dimensional growth with activation energy of 168.33 kJ/mole.
abstractGer	Abstract Nano crystalline strontium hexaferrite, $ SrFe_{12} %$ O_{19} $ powders have been synthesized using co-precipitation method. The ferrite precursors were obtained from aqueous mixtures of strontium chloride and ferric chloride by precipitating strontium and iron using 7.5 M sodium hydroxide solution. These precursors were heat treated at 800 and 1200°C in nitrogen atmosphere. The decomposition behaviour and reaction kinetics were investigated by means of DSC/DTG/TG for three heating rates. The various phases associated therein were identified by X-ray diffraction (XRD). From field emission scanning electron microscopy (FESEM) study, the formations of nonporous ultrafine particles have been confirmed. About 5 to 10% of the needle like crystals in the ‘as synthesized, condition were transformed to pyramidal structure and most of the crystals are found to have plate like hexagonal structures with increase in heat treatment temperatures. Activation energies and Avrami index ‘n’ were obtained using Johnson-Mehl-Avrami (JMA) equation. The reaction in the temperature range of 800 to 1200°C, proceeds as, instantaneous nucleation and three dimensional growth with activation energy of 168.33 kJ/mole.
abstract_unstemmed	Abstract Nano crystalline strontium hexaferrite, $ SrFe_{12} %$ O_{19} $ powders have been synthesized using co-precipitation method. The ferrite precursors were obtained from aqueous mixtures of strontium chloride and ferric chloride by precipitating strontium and iron using 7.5 M sodium hydroxide solution. These precursors were heat treated at 800 and 1200°C in nitrogen atmosphere. The decomposition behaviour and reaction kinetics were investigated by means of DSC/DTG/TG for three heating rates. The various phases associated therein were identified by X-ray diffraction (XRD). From field emission scanning electron microscopy (FESEM) study, the formations of nonporous ultrafine particles have been confirmed. About 5 to 10% of the needle like crystals in the ‘as synthesized, condition were transformed to pyramidal structure and most of the crystals are found to have plate like hexagonal structures with increase in heat treatment temperatures. Activation energies and Avrami index ‘n’ were obtained using Johnson-Mehl-Avrami (JMA) equation. The reaction in the temperature range of 800 to 1200°C, proceeds as, instantaneous nucleation and three dimensional growth with activation energy of 168.33 kJ/mole.
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title_short	Reaction kinetic studies of strontium hexaferrite nanoparticles synthesized by co-precipitation method
url	https://dx.doi.org/10.1007/s12666-010-0003-3
remote_bool	true
author2	Agarwala, R. C. Agarwala, Vijaya
author2Str	Agarwala, R. C. Agarwala, Vijaya
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doi_str	10.1007/s12666-010-0003-3
up_date	2024-07-03T22:38:06.981Z
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Reaction kinetic studies of strontium hexaferrite nanoparticles synthesized by co-precipitation method

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