The intrinsic thermal decomposition kinetics of SrCO3 by a nonisothermal technique

Arvanitidis, I.; Sichen, Du; Seetharaman, Seshadri; Sohn, Hong Yong

doi:10.1007/s11663-997-0060-0

Cited by 42 publications

(26 citation statements)

References 7 publications

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“…The corresponding weight loss appears in 700-950°C in the TG curves. As reported previously [11], the thermal decomposition of SrCO 3 start at about 1000 K. Therefore the thermal analysis could confirm that the residual SrCO 3 exists in the SrTiO 3 dry gel. However, the endothermic peak disappears by adding PVP into the SrTiO 3 solution.…”

Section: Methodssupporting

confidence: 82%

Dielectric breakdown characteristics of sol–gel derived SrTiO3 films

Peng

Yao

et al. 2016

J Mater Sci: Mater Electron

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Dielectric breakdown behavior of sol-gel derived SrTiO 3 films has been studied systematically. The dielectric strength and leakage characteristics of SrTiO 3 films were observed to have a strong dependence on the top electrode materials. Compared with films with Ti or Al electrode, SrTiO 3 films with Au electrode exhibited relatively low dielectric breakdown strength. Simultaneously, a broad area of damage occurred in the Au electrode after breakdown, which is closely related to the self-healing breakdown mechanism. The corresponding leakage current kept the same order of magnitude when the electric field was higher than 100 MV/m. The higher dielectric strength of the films with Ti or Al electrode is attributed to anodic oxidation of metal electrode.

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Section: Methodssupporting

confidence: 82%

Dielectric breakdown characteristics of sol–gel derived SrTiO3 films

Peng

Yao

et al. 2016

J Mater Sci: Mater Electron

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“…Moreover, it is known that alkaline earth carbonates do not suffer from any weight change below 500°C [43,44]. Thus, it is plausible to relate the observed WL at 230-400°C range to the acetate group decomposition.…”

Section: Thermal Analysesmentioning

confidence: 94%

“…The first peak (being located at 699, 764, and 749°C for CaCo, SrCo, and BaCo mixtures, respectively) can be correlated with the decomposition of the alkaline earth carbonates. Previous studies have identified that CaCO 3 , SrCO 3 , and BaCO 3 undergo decomposition at temperatures higher than 650 [45], 730 [43], and 970°C [44,46], respectively. Knowing that the addition of some oxides like TiO 2 [44] and Cr 2 O 3 [46] shifts the decomposition temperature of BaCO 3 to temperatures as low as 600°C, one may arrive at the conclusion that the presence of Co 3 O 4 also enhances the decomposition temperature of BaCO 3 as well as the other alkaline earth carbonates towards lower temperatures.…”

Section: Thermal Analysesmentioning

confidence: 99%

Nitrous Oxide Decomposition Over MCO3–Co3O4 (M = Ca, Sr, Ba) Catalysts

Abu-Zied

Soliman

2009

Catal Lett

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In this paper, nitrous oxide decomposition over a series of MCO 3 -Co 3 O 4 (M = Ca, Sr, Ba) catalysts having M/Co ratios of 0.1-0.4 has been studied. The various catalysts were characterized using thermal (TGA, DTA), XRD, IR and N 2 sorption techniques. N 2 O decomposition activity was found to be dependent on the type of the alkaline earth cation, the M/Co ratio, cobalt oxide crystallites sizes, and the calcination temperature.

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“…Al aplicar ln a la Ecuación 1 nos queda: [3] Graficando ln k contra 1/T para cada temperatura se puede realizar una regresión lineal entre los puntos cuyo valor de la pendiente (m) es equivalente a -E a /R (Ecuación de la recta).…”

Section: Interpretación De Resultadosunclassified

Estudio cinético de la descomposición térmica del carbonato de Estroncio en el sistema SrCO3-Al2O3-SrSO4

G¹,

T²,

R³

2008

Bol. Soc. Esp. Ceram. Vidr.

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La cinética de descomposición térmica del carbonato de Estroncio (SrCO 3 ) en el sistema SrCO 3 -Al 2 O 3 -SrSO 4 se estudió por medio de análisis térmico gravimétrico (ATG), utilizando el método isotérmico. Se prepararon mezclas de polvos 3:3:1 molar de SrCO 3 , Al 2 O 3 y SrSO 4 grado reactivo, las cuales fueron homogenizadas y tratadas a temperaturas entre 750 hasta 1100°C, por periodo de 4 horas. Adicionalmente se estudio el efecto del tiempo de activación mecánica del SrCO 3 sobre la cinética de descomposición. Se obtuvieron curvas representativas de la pérdida de peso de las muestras al incrementar la temperatura, a partir de ellas se realizó el estudio cinético. Para el rango de temperatura de 750 a 900°C, el mecanismo de reacción que rige el proceso de descomposición corresponde a una contracción geométrica mediante la frontera de grano (R 1.1 ) con una energía de activación (E a ) de 106.21KJmol -1 . En el rango de temperatura de 950 a 1100°C, el mecanismo de reacción que rige la descomposición corresponde a un proceso de nucleación y crecimiento (P 1.1 ), con un valor de E a de 44.87KJmol -1 . La energía de activación disminuye conforme se incrementa el tiempo de activado mecánico hasta un 35% para el caso de siete horas. Palabras clave: cinética, análisis termo gravimétrico, método isotérmico, activación mecánica, energía de activación. Kinetics of Thermal decomposition of strontium carbonate in the SrCO 3 -Al 2 O 3 -SrSO 4 systemThe thermal decomposition of strontium carbonate in the SrCO 3 -Al 2 O 3 -SrSO 4 system was studied by thermal analysis under isothermal experiments. Powder of reactive grade of SrCO 3 , Al 2 O 3 y SrSO 4 in molar ratio 3:3:1 were prepared. The powders were heat treated from 750 to 1000 °C for 4 h. Loss weight for each temperature was registered and the kinetics parameter were determine using the classical fit method. The effect of mechanical activation of SrCO 3 was studied as well. The reaction mechanism for 750 to 900 °C temperature range corresponded to a geometric shrinkage in the grain boundary (R 1.1 ) with an activation energy of 106. 21 Kjmol -1 . The reaction mechanism for 900 to 1100 °C temperature range corresponded to a nucleation and growing (P 1.1 ) with an activation energy of 44.87 Kjmol -1 . The activation energy was reduced in 35% for the samples that contained SrCO 3 mechanically activated.

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The intrinsic thermal decomposition kinetics of SrCO3 by a nonisothermal technique

Cited by 42 publications

References 7 publications

Dielectric breakdown characteristics of sol–gel derived SrTiO3 films

Dielectric breakdown characteristics of sol–gel derived SrTiO3 films

Nitrous Oxide Decomposition Over MCO3–Co3O4 (M = Ca, Sr, Ba) Catalysts

Estudio cinético de la descomposición térmica del carbonato de Estroncio en el sistema SrCO<sub>3</sub>-Al<sub>2</sub>O<sub>3</sub>-SrSO<sub>4</sub>

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