Preparation of Cordierite/ZrO2 Nano-Composite Powders by a Colloidal Coating Process.

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  • SUN En-Hai
    Institute of Scientific and Industrial Research, Osaka University
  • KUSUNOSE Takafumi
    Institute of Scientific and Industrial Research, Osaka University
  • SEKINO Tohru
    Institute of Scientific and Industrial Research, Osaka University
  • ADACHI Tomohiko
    Institute of Scientific and Industrial Research, Osaka University
  • WADA Masashi
    Institute of Scientific and Industrial Research, Osaka University
  • NIIHARA Koichi
    Institute of Scientific and Industrial Research, Osaka University

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Other Title
  • コロイダルコーティングによるコーディエライト/ZrO<sub>2</sub>ナノコンポジットパウダーの作製
  • Preparation of Cordierite/ZnO2 Nano-Composite Powders by a Colloidal Coating Process

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Abstract

Cordierite/ZrO2 nano-composite powders were prepared by a colloidal coating process. Cordierite particles are embedded within a continuous layer of fine amorphous ZrO2 that was provided by the colloidal processing after drying. Tetragonal ZrO2 was first formed at 650°C and monoclinic ZrO2 phase was identified at the calcination temperature of 800°C. After calcination at 850°C, crystallized ZrO2 particles with the size from 10nm to 30nm homogeneously covered the surface of cordierite particles. Cordierite/ZrO2 nano-composite powders prepared by a colloidal coating process show better sinterability than that of cordierite/ZrO2 powder mixtures prepared by a conventional mixing method, and were sintered to a density of over 96% at a low temperature of 1300°C.

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