| 堇青石低热膨胀机理研究 |
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| 引用本文： | 张振禹,耿建刚.堇青石低热膨胀机理研究[J].地质科学,1997,32(3):308-312. |
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| 作者姓名： | 张振禹 耿建刚 |
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| 作者单位： | 1. 中国科学院地质研究所, 北京100029;2. 中国地质大学材料科学系, 北京100083 |
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| 摘 要： | 本文根据垄青石晶体结构特点和有关热力学资料,建立了堇青石热膨胀系数的理论计算模式:半定量计算方法,α=αMgO × 1/3 × 2/3;定量计算方法,α=ΔS/ΔT/2/(a × b).分别计算了堇青石、印度石的线热膨胀系数,半定量计算结果:α=3.31 × 10-6℃-1(堇青石、印度石);定量计算结果,a=1.54 × 10-6℃-1(堇青石),α=0.85 × 10-6℃-1(印度石),与实验测定结果(堇青石:α=2.3 × 10-6℃-1,印度石:α=1.0 × 10-6℃-1)吻合。
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| 关 键 词： | 堇青石 晶体结构 热膨胀 |
| 收稿时间： | 1997-02-13 |
| 修稿时间： | 1997-02-13; |
STUDY ON THE MECHANISM OF THE LOW THERMAL EXPANSION OF CORDIERITE |
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| Zhang Zhenyu,Liu Weiling,Geng Jiangang.STUDY ON THE MECHANISM OF THE LOW THERMAL EXPANSION OF CORDIERITE[J].Chinese Journal of Geology,1997,32(3):308-312. |
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| Authors: | Zhang Zhenyu Liu Weiling Geng Jiangang |
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| Institution: | 1. Institute of Geology, Chinese Academy of Sciences, Beijing 100029;2. Departmem of Materials Sciences, China University of Geosciences, Beijing 100083 |
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| Abstract: | models to calculate the thermal expansion coefficient of cordierite, which areMany scientists are intreted in cordierite because of its unusual low thermal expansion. And some of them have made a conclusion that the unusual low thermal expansion of cordierite is related to its crystal structure, but not proven, just qualitative study. By studying its crystal structure and thermal data, authors have built up two αA,B=ΔS/ΔT/2/(a × b)for quantitative calculation and α=αMgO × 1/3 × 2/3 for semi-quantitative calculation. And the calculation results are identical with the experimental result. |
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| Keywords: | Cordierite Crystal structure Thermal expansion |
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