Effects of alumina sols on the sintering of α-alumina ceramics

被引：13

作者：

Yang, Rui ^{[1
,2
]}

Qi, Zhe ^{[1
]}

Gao, Ye ^{[1
]}

Yang, Jinhua ^{[1
]}

Zhou, Yiran ^{[1
]}

Liu, Hu ^{[1
,2
]}

Peng, Luming ^{[3
,4
]}

Jiao, Jian ^{[1
,2
]}

机构：

[1] AECC Beijing Inst Aeronaut Mat, Natl Key Lab Adv Composites, Beijing 100095, Peoples R China

[2] AECC Beijing Inst Aeronaut Mat, Key Lab Adv Corros & Protect Aviat Mat, Beijing 100095, Peoples R China

[3] Nanjing Univ, Key Lab Mesoscop Chem MOE, Sch Chem & Chem Engn, Nanjing 210023, Jiangsu, Peoples R China

[4] Nanjing Univ, Collaborat Innovat Ctr Chem Life Sci, Sch Chem & Chem Engn, Nanjing 210023, Jiangsu, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2020年 / 46卷 / 13期

关键词：

Sintering; Alumina sol; Densification; Alumina ceramic; MECHANICAL-PROPERTIES; GRAIN-GROWTH; MICROSTRUCTURE; HIP;

D O I：

10.1016/j.ceramint.2020.05.125

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effects of two kinds of alumina sols on the densification behavior of sub-micron grain sized alpha-alumina ceramics have been investigated. Composition of the sol-derived gels was investigated by energy dispersive spectra and Fourier transform infrared spectra. Structural evolution of the gels at different temperatures was characterized by a combination of X-ray diffraction and Al-27 magic angle spinning nuclear magnetic resonance spectroscopy. Results showed that the gel containing chlorine and carbon transformed to alpha-alumina at about 950 degrees C, significantly lower than the other gel which transformed at about 1050 degrees C. Density measurements and scanning electron microscopy analyses were used to investigate the sintering of alumina ceramics with or without alumina sols. It was found that the alumina sols had profound effects on the densification of alumina ceramics. The ceramic displayed the best densification behavior when the sol containing chlorine and carbon was added.

引用

页码：20865 / 20870

页数：6

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