| 镁热自蔓延高温合成硼化钙微粉的动力学 |
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| 引用本文： | 纪武仁. 镁热自蔓延高温合成硼化钙微粉的动力学[J]. 甘肃冶金, 2009, 31(3): 77-80 |
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| 作者姓名： | 纪武仁 |
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| 作者单位： | 白银公司技术改造部,甘肃,白银,730900 |
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| 摘 要： | 应用DTA技术分别测定Mg与CaO，Mg与B2O3及Mg与CaO和B2O3之间的多相反应，分析Mg，CaO和B2O3三相可能存在的反应机制，应用Freeman-Carroll法和Kissinger法计算反应的活化能和反应级数。结果表明Mg-B2O3-CaO之间的反应为复杂的固固、液固反应机制。表观活化能在温度段756-810℃为E1=297kJ·mol^-1，相应的反应级数分别为nl=1．0。采用Kissinger法计算的反应级数为1．1，与Freeman-Carroll法所得的nl=1．0基本一致。
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| 关 键 词： | 硼化钙 自蔓延高温合成 差热分析 动力学 |
Kinetics of Preparation of Caianium Boride by SHS |
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| JI Wu-ren. Kinetics of Preparation of Caianium Boride by SHS[J]. Gansu Metallurgy, 2009, 31(3): 77-80 |
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| Authors: | JI Wu-ren |
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| Affiliation: | Technique Reconstruct Office of BYGS;Baiyin 730900;China |
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| Abstract: | The kinetics of preparation of cainium boride by SHS was studied.DTA curves of the reactions of Mg+CaO,Mg+B2O3and Mg+CaO+B2O3 were measured,compared and analyzed.It was found that the reaction of Mg+ CaO +B2O3 was a complicated reaction of solid-liquid-liquid-Solid The surface free energy of reaction of Mg+CaO+B2O3 was determined by the methods of Freeman-Carroll and Kissinger respectively.The results showed that E is 297 kJ·mol-1in 756~810℃,reaction progressions is n1=1.0.The reaction progressions determined by the methods of Kissinger was 1.1 and was the same mostly as that determined by the method of Freeman-Carroll |
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| Keywords: | preparation of cainium boride SHS DTA kinetics |
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