HAO Shijing 1, WANG Hailong ¹, SHAO Gang ¹, FAN Bingbing ¹, LU Hongxia ¹,
XU Hongliang ¹, CHEN Deliang ¹, ZHANG Rui ²
(1.School of Materials Science and Engineering , Zhengzhou University , Zhengzhou 450001, Henan, China; 2.Zhengzhou University
of Aeronautics , Zhengzhou 450015, Henan, China)

Abstract: Fine Li₂O-Al₂O₃-SiO₂ (LAS) glass ceramics particles were crushed by high energy ball milling. The effect of the milling time on the particle size of LAS glass ceramics was investigated. Particle-size analyser, X-ray diffraction and scanning electron microscopy are used to characterize the particle size, phase and microstructure of the LAS glass ceramics. Meanwhile, the flexural strength of the sintered LAS glass ceramics were considered too. It’s found that the particle size of LAS can be decreased to 358 nm after milled 75 min by high energy ball milling. The crystallization temperature of fine LAS glass ceramics powder is 50 oC lower than that of initial powder. The crystal phase is β-spodumene for the LAS sintered at 850 ℃. The bending strength of sintered LAS is 61.67 MPa, which is about 40% higher than that of specimens made from raw powder.

Key words: glass ceramics; high energy ball milling; LAS; bending strength