Influence of Parameters of High-energy Ball Milling on the Synthesis and Densification of Magnesium Aluminate Spinel

Authors

  • Jianhua Liu School of Metallurgy and Environment, Central South University
  • Xiaojun Lv School of Metallurgy and Environment, Central South University
  • Jie Li School of Metallurgy and Environment, Central South University
  • Xiaopeng Zeng School of Metallurgy and Environment, Central South University
  • Zhenming Xu School of Metallurgy and Environment, Central South University
  • Hongliang Zhang School of Metallurgy and Environment, Central South University
  • Liangxing Jiang School of Metallurgy and Environment, Central South University

Abstract

This study investigated the effect of planetary ball mill parameters on the particle size of a powder mixture of alumina and magnesia, the composition of synthetic magnesium aluminate spinel (MAS), and the subsequent densification of MAS. The results show that the particle size of the milled powders decreases gradually from 32.39 μm to 11.69 μm with the increase of milling time from 1 h to 7 h at milling speed of 120 rpm. The particle size of the milled powders decreases gradually from 42.92 μm to 9.00 μm as the milling speed was increased from 60 rpm to 240 rpm at a milling time of 3 h. Only a spinel phase can be obtained from these calcined powders when the starting powders of the calcined powders are milled for more than 1 hour or at above 60 rpm. The relative density and flexural strength of the sintered products exceed 86.67% and 105 MPa, respectively.

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Published

2017-12-13

Issue

Vol. 48 No. 3 (2016)

Section

Articles