コロイダルコーティングによるコーディエライト/ZrO_2ナノコンポジットパウダーの作製

概要

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Cordierite/ZrO_2 nano-composite powders were prepared by a colloidal coating process. Cordierite particles are embedded within a continuous layer of fine amorphous ZrO_2 that was provided by the colloidal processing after drying. Tetragonal ZrO_2 was first formed at 650℃ and monoclinic ZrO_2 phase was identified at the calcination temperature of 800℃. After calcination at 850℃, crystallized ZrO_2 particles with the size from 10nm to 30nm homogeneously covered the surface of cordierite particles. Cordierite/ZrO_2 nano-composite powders prepared by a colloidal coating process show better sinterability than that of cordierite/ZrO_2 powder mixtures prepared by a conventional mixing method, and were sintered to a density of over 96% at a low temperature of 1300℃.
2002-02-01