Preparation and Mechanical Properties of AlON Transparent Ceramics

Abstract

Abstract: AlON transparent ceramics have broad application prospects in national defense and civil use due to its good light transmission, thermal shock stability, mechanical properties and good processability. The AlON powder were prepared in batches by an improved carbothermal reduction nitridation/fluidized bed method in this article. A single batch can prepare up to 2 kg, and no second phase was observed in the XRD patterns of AlON powder. Laser particle size analysis shows an average particle size of 1.54 μm and the particle size distribution is uniform. Green body with good uniformity and high density was obtained using the powder molded by cold isostatic pressing. AlON transparent ceramics with transmissivity of 82.3% and bending strength of 310 MPa were prepared by sintering temperature at 1 850 ℃ and nitrogen pressure of 5 MPa, which has certain practical significance for promoting the application of AlON transparent ceramics.

Key words: AlON, carbothermal reduction nitridation method, high-purity powder, transparent ceramics, transmittance, gas pressure sintering

CLC Number:

TQ174.75

WANG Ying, ZHANG Wei, TIAN Tingyan, HUANG Cunxin, WANG Zhen, CHEN Jianrong, SHI Shuangshuang. Preparation and Mechanical Properties of AlON Transparent Ceramics[J]. Journal of Synthetic Crystals, 2023, 52(12): 2215-2221.

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