TiO2与SiO2掺杂对Al2O3相转变的研究

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (2): 587-590.

所属专题：陶瓷

TiO₂与SiO₂掺杂对Al₂O₃相转变的研究

林聪毅^1,2, 孙小曼¹, 李蔚¹

1.华东理工大学材料科学与工程学院,上海 200237;
2.上海三思电子工程有限公司,上海 201199

收稿日期:2020-07-23 修回日期:2020-11-20 出版日期:2021-02-15 发布日期:2021-03-10
通讯作者: 李蔚,教授。E-mail:liweiwei@ecust.edu.cn
作者简介:林聪毅(1984—),男,工程师。主要从事新材料及应用方面的研究。E-mail:tyylcy@qq.com

Investigation on Phase Transition of Al₂O₃ Doped with TiO₂ and SiO₂

LIN Congyi^1,2, SUN Xiaoman¹, LI Wei¹

1. School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China;
2. Shanghai Sansi Electronics Engineering Co., Ltd., Shanghai 201199, China

Received:2020-07-23 Revised:2020-11-20 Online:2021-02-15 Published:2021-03-10

摘要/Abstract

摘要： 通过球磨混合法,制备TiO₂、SiO₂和TiO₂+SiO₂掺杂的Al₂O₃粉体,经不同温度煅烧后进行X射线衍射(XRD)测试,比较研究这三种掺杂对Al₂O₃粉体相转变温度的影响。研究结果表明,TiO₂、SiO₂掺杂对γ-Al₂O₃向α-Al₂O₃的相转变均有促进作用。在掺杂质量分数为0.5%的情况下,二者可分别使γ-Al₂O₃完全转变为α-Al₂O₃的温度降低100 ℃和125 ℃。而TiO₂+SiO₂复合掺杂对γ-Al₂O₃向α-Al₂O₃相转变的促进作用优于TiO₂、SiO₂单独掺杂。TiO₂、SiO₂的质量分数均为0.3%时,复合掺杂可使γ-Al₂O₃完全转变为α-Al₂O₃的温度降低150 ℃。此外,还对TiO₂、SiO₂和TiO₂+SiO₂掺杂促进Al₂O₃粉体相转变的机理作了简单分析。

关键词: Al₂O₃粉体, 相转变, TiO₂, SiO₂, 掺杂

Abstract: TiO₂, SiO₂ and TiO₂ + SiO₂ doped Al₂O₃ powders were prepared by ball milling. After calcination at different temperatures, X-ray diffraction (XRD) tests were carried out, and the effects of these three kinds of doping on the phase transition temperature of Al₂O₃ powder were compared. The results show that TiO₂ and SiO₂ doping promote the phase transition from γ-Al₂O₃ to α-Al₂O₃ effectively. In the case of doping mass fraction of 0.5%, temperatures of γ-Al₂O₃ to α-Al₂O₃ are reduced by 100 ℃ and 125 ℃ respectively. The effect of TiO₂+ SiO₂ co-doping on the phase transition of Al₂O₃ is better than that of TiO₂ and SiO₂ alone. The doping of 0.3% (mass fraction) TiO₂ and 0.3% (mass fraction) SiO₂ reduces the temperature of γ-Al₂O₃ to α-Al₂O₃ by 150 ℃. In addition, the mechanism of TiO₂, SiO₂ and TiO₂+SiO₂ doping to promote the phase transformation of Al₂O₃ powder was analyzed.

Key words: Al₂O₃ powder, phase transition, TiO₂, SiO₂, doping

中图分类号:

TQ174

林聪毅, 孙小曼, 李蔚. TiO₂与SiO₂掺杂对Al₂O₃相转变的研究[J]. 硅酸盐通报, 2021, 40(2): 587-590.

LIN Congyi, SUN Xiaoman, LI Wei. Investigation on Phase Transition of Al₂O₃ Doped with TiO₂ and SiO₂[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(2): 587-590.

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TiO₂与SiO₂掺杂对Al₂O₃相转变的研究

Investigation on Phase Transition of Al₂O₃ Doped with TiO₂ and SiO₂

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