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首页> 外文期刊>Journal of Ceramic Processing Research. (Text in English) >Synthesis of low thermal expansion ceramics prepared from pyrophyllite and lithium source
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Synthesis of low thermal expansion ceramics prepared from pyrophyllite and lithium source

机译：叶蜡石和锂源合成的低热膨胀陶瓷

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摘要

In this study, the low thermal expansion ceramic, petalite (Li2O center dot Al2O3 center dot 8SiO(2)), was synthesized by using pyrophyllite, and their characteristics were examined. Pyrophyllite is consisted of SiO2 and Al2O3, which are the main component of petalite. For the synthesis of petalite, Li2CO3 or LiOH center dot H2O were used as a source of Li2O. In the mixing ratio of 6.7 : 1 wt% (pyrophyllite : Li2CO3), fully crystallized petalite was synthesized, and the powder compacts were densified at 1150 degrees C. Some Li compounds, which have low melting point, caused a formation of liquid phase in the densified samples. The petalite phase was transformed to beta-spodumene during heating process, and the sintered petalite showed a negative thermal expansion coefficient of -0.43 x 10(-6)/degrees C. Finally, the experimental results showed that the pyrophyllite is an expected material for the synthesis of low thermal expansion ceramics.
机译：在这项研究中，使用叶蜡石合成了低热膨胀陶瓷花瓣石（Li2O中心点Al2O3中心点8SiO（2）），并检查了它们的特性。叶蜡石由SiO 2和Al 2 O 3组成，这是花瓣石的主要成分。为了合成花瓣石，使用Li2CO3或LiOH中心点H2O作为Li2O的来源。在6.7：1重量％（叶蜡石：Li2CO3）的混合比下，合成了完全结晶的花瓣石，并在1150摄氏度下致密化了粉末压块。一些熔点低的Li化合物导致在液相中形成液相。致密的样品。花瓣状相在加热过程中转变为β-锂辉石，而烧结的花瓣状相的负热膨胀系数为-0.43 x 10（-6）/℃。最后，实验结果表明，叶蜡石是一种理想的材料。低热膨胀陶瓷的合成。

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