金属アルコキシド法によるコーディエライトームライト複合前駆体粉末の合成と焼結

概要

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Homogeneous precursor powders for obtaining cordierite composites with uniformly dispersed mullite particles were prepared by partial hydrolysis of alkoxides. The precursor powders crystallized into mullite and MgAl_2O_4 at 900℃. Cordierite crystal was formed above 1200℃, which was formed through the solid-solid reactions among MgAl_2O_4, β-quartz solid solution, sapphire and unknown phases. The crystalline phases in the composites sintered above 1300℃ were cordierite and mullite. The dense composite containing 40 mol% mullite which was obtained by firing at 1300℃ for 2 h had the mean 4-point bending strength of 125 MPa and the thermal expansion coefficient of about 3.1 X10^<-6>/℃, respectively.
社団法人日本セラミックス協会の論文
1988-06-01