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Citation: MI Yan, HUANG Zai-Yin, JIANG Jun-Ying, LI Yan-Fen. In situ Microcalorimetry Insight into the Growth of CaMoO₄ Microcrystallites[J]. Acta Physico-Chimica Sinica, ;2009, 25(12): 2422-2426. doi: 10.3866/PKU.WHXB20091215 shu

In situ Microcalorimetry Insight into the Growth of CaMoO₄ Microcrystallites

1.
College of Chemistry&Ecological Engineering, Guangxi University for Nationalities, Nanning 530006, P. R. China

Received Date: 10 August 2009
Available Online: 3 November 2009

In situ calorimetric studies of CaMoO4 microcrystallite fabrication were performed in an alkalescent aqueous solution. We first presented an oscillatory microcalorimetric heat flow curve pattern which traced the energy evolution of the CaMoO4 microcrystallite growth process. A characteristic endothermic peak for the initial reaction and double relatively weak and discontiguous exothermic peaks for the subsequent crystal growth were observed. We briefly discussed the morphology evolution and the thermokinetics information of the growth process of CaMoO4 microcrystallites on the basis of the oriented attachment mechanism. The rate constants of the reaction and nucleation, crystal crystallization, and microcrystalline secondary growth were found to be 1.54×10-4, 1.09×10-4, and 0.71×10-4 s-1, respectively. As the crystals aggregated and repelled each other, the reaction slowed leading to a relatively flatter second exothermic curve.
- Microcalorimetry,
- Thermokinetics,
- CaMoO4,
- Microcrystallite,
- Characteristic heat flow curve,
- Oriented attachment mechanism
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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In situ Microcalorimetry Insight into the Growth of CaMoO4 Microcrystallites

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通讯作者: 陈斌, bchen63@163.com

In situ Microcalorimetry Insight into the Growth of CaMoO₄ Microcrystallites