MgTi2O5对钛酸铝陶瓷低温合成及性能的影响

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (12): 4545-4552.

MgTi₂O₅对钛酸铝陶瓷低温合成及性能的影响

张宏泉¹, 程光健¹, 文进¹, 陈鹏杰²

1.武汉理工大学材料科学与工程学院, 武汉 430070;
2.揭阳恒成陶瓷科技有限公司, 揭阳 515500

收稿日期:2024-06-18 修订日期:2024-08-09 出版日期:2024-12-15 发布日期:2024-12-19
作者简介:张宏泉(1966—),男,博士,教授。主要从事功能陶瓷材料等方面的研究。E-mail:zhq-wh@126.com

Effect of MgTi₂O₅ on Low Temperature Synthesis and Properties of Aluminum Titanate Ceramics

ZHANG Hongquan¹, CHENG Guangjian¹, WEN Jin¹, CHEN Pengjie²

1. School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China;
2. Jieyang Hengcheng Ceramic Technology Co.,Ltd, Jieyang 515500, China

Received:2024-06-18 Revised:2024-08-09 Published:2024-12-15 Online:2024-12-19

摘要/Abstract

摘要： 以预合成MgTi₂O₅和MgO+2TiO₂原位合成MgTi₂O₅两种方式引入钛酸铝陶瓷制备所需添加剂,研究MgTi₂O₅对钛酸铝陶瓷物相组成和性能的影响。结果表明,MgTi₂O₅或MgO+2TiO₂均可通过形成固溶体促进钛酸铝的低温合成,但添加少量MgTi₂O₅即可在较低温度下有效促进钛酸铝晶体的合成。当MgO含量为2%(摩尔分数)时,在1 300 ℃下添加MgTi₂O₅的钛酸铝合成率比添加MgO+2TiO₂的提高了28.4个百分点;在钛酸铝合成率相近的前提下,添加MgTi₂O₅比添加MgO+2TiO₂的烧成温度低。当添加6%MgTi₂O₅时,在1 280~1 350 ℃所烧成陶瓷样品的热膨胀系数介于-0.11×10^-6~0.58×10^-6 ℃^-1。随着烧成温度升高,由于晶体的各向异性及过度生长,晶体内部存在的微裂纹易使所得钛酸铝陶瓷的抗折强度降低。

关键词: MgTi₂O₅, 钛酸铝, 低温合成, 烧成温度, 低热膨胀, 晶体结构

Abstract: In this paper, pre-synthesized MgTi₂O₅ and MgO+2TiO₂ in-situ synthesized MgTi₂O₅ were introduced as the additives required for the preparation of aluminum titanate ceramics, and the effect of MgTi₂O₅ on the phase composition and properties of aluminum titanate ceramics was studied. The results show that MgTi₂O₅ or MgO+2TiO₂ can promote the synthesis of aluminum titanate at low temperature by forming solid solution, the addition of a small amount of MgTi₂O₅ can effectively promote the synthesis of aluminum titanate crystals at a lower temperature. When the MgO content is 2% (mole fraction), the synthesis rate of aluminum titanate added with MgTi₂O₅ at 1 300 ℃ is 28.4 percentage point higher than that of MgO+2TiO₂. On the premise of similar synthesis rate of aluminum titanate, the firing temperature of adding MgTi₂O₅ is lower than that of adding MgO+2TiO₂. When 6%MgTi₂O₅ is added, the thermal expansion coefficient of the ceramic samples fired at 1 280~1 350 ℃ is between -0.11×10^-6 ℃^-1 and 0.58×10^-6 ℃^-1. With the increase of firing temperature, due to the anisotropy and overgrowth of crystal, the microcracks inside crystal are easy to reduce the flexural strength of obtained aluminum titanate ceramics.

Key words: MgTi₂O₅, aluminum titanate, low temperature synthesis, firing temperature, low thermal expansion, crystal structure

中图分类号:

TQ174

张宏泉, 程光健, 文进, 陈鹏杰. MgTi₂O₅对钛酸铝陶瓷低温合成及性能的影响[J]. 硅酸盐通报, 2024, 43(12): 4545-4552.

ZHANG Hongquan, CHENG Guangjian, WEN Jin, CHEN Pengjie. Effect of MgTi₂O₅ on Low Temperature Synthesis and Properties of Aluminum Titanate Ceramics[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(12): 4545-4552.

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MgTi₂O₅对钛酸铝陶瓷低温合成及性能的影响

Effect of MgTi₂O₅ on Low Temperature Synthesis and Properties of Aluminum Titanate Ceramics

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