Effects of Zn2SiO4 on the phase evolution, thermal expansion and mechanical properties of LiAlSiO4 ceramic

doi:10.1016/j.ceramint.2018.07.187

	Effects of Zn2SiO4 on the phase evolution, thermal expansion and mechanical properties of LiAlSiO4 ceramic
	Hao, Liang 1,2; Ren, Haishen 1; Peng, Haiyi 1; Zhang, Yi 1; Meng, Fancheng 2; Yao, Xiaogang 1; Lin, Huixing 1
刊名	Ceramics International
	2018
卷号	44 期号:16 页码:19481-19485
ISSN号	02728842
DOI	10.1016/j.ceramint.2018.07.187
英文摘要	LiAlSiO4 (abbreviated as LAS) ceramics doped with variable mass percent of Zn2SiO4 were prepared by conventional solid-state route. The effects of Zn2SiO4 on the phase evolution, microstructure, thermal expansion and mechanical properties have been fully investigated. The results show that Zn2SiO4 reacted with LAS matrix to produce Li2Al2Si3O10 and ZnAl2O4. Fine-grain ZnAl2O4 phase accumulated on the grain boundaries of the main phase, which was helpful to improve the density. Simultaneously, both of the flexure strength and Vickers hardness of the multiphase ceramics were significantly enhanced with the increasing mass percent of Zn2SiO4 for the reason of dispersion strengthening effect. In addition, when the content of Zn2SiO4 increased from 10 wt% to 22.5 wt%, the coefficient of thermal expansion (CTE) of the composite ceramics increased monotonously from − 5.24 × 10−6/K to 1.49 × 10−6/K. Typically, the LAS ceramic doping with 17.5 wt% Zn2SiO4 sintered at 1175 °C for 4 h possesses excellent properties: α = 0.65 × 10−6/K, Hv = 5.34 GPa, σs = 102.6 MPa, which is a promising material in laser gyroscope and precision machining fields. © 2018 Elsevier Ltd and Techna Group S.r.l.
出版者	Elsevier Ltd
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/25342]
专题	中国科学院上海硅酸盐研究所
作者单位	1.Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 201800, China; 2.College of Materials Science and Engineering, Chongqing University of Technology, Chongqing; 400054, China
推荐引用方式 GB/T 7714	Hao, Liang,Ren, Haishen,Peng, Haiyi,et al. Effects of Zn2SiO4 on the phase evolution, thermal expansion and mechanical properties of LiAlSiO4 ceramic[J]. Ceramics International,2018,44(16):19481-19485.
APA	Hao, Liang.,Ren, Haishen.,Peng, Haiyi.,Zhang, Yi.,Meng, Fancheng.,...&Lin, Huixing.(2018).Effects of Zn2SiO4 on the phase evolution, thermal expansion and mechanical properties of LiAlSiO4 ceramic.Ceramics International,44(16),19481-19485.
MLA	Hao, Liang,et al."Effects of Zn2SiO4 on the phase evolution, thermal expansion and mechanical properties of LiAlSiO4 ceramic".Ceramics International 44.16(2018):19481-19485.