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Study on Effects of Sintering Parameters on Strength of Al2O3 Ceramic Cast

YANG Laixia 1 ,DUAN Zhijun 1 ,WU Haihua 2

（1. School of Material Science and Engineering, Xi'an University of Science and Technology, Xi'an 710054; 2. Xianji

Manufacturing Research Institute, Xi'an Jiaotong University, Xi'an 710049）

Abstract: In this paper, Al2O3 ceramic cast was prepared by sol-gel process. Different firing temperature, the holding time, the heating rate and the chemical additive affected cast strength. It was shown that after being sintered at 1550℃ and held for 4h, the high temperature bending strength of ceramic body with 58vol% solids content can reach 14MPa, thus meeting the machine-finishing needs.

Keywords: sol-gel, cast ceramic, sintering parameters, chemical additive, high temperature bending strength


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