Microwave Dielectric Properties of 0.9Al2O3-0.1TiO2 Ceramics Prepared by Aqueous Gelcasting

被引：7

作者：

Wu Jia-Min ^{[1
]}

Lue Wen-Zhong ^{[1
]}

Liang Jun ^{[1
]}

Wang Xiao-Hong ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Dept Elect Sci & Technol, Wuhan 430074, Peoples R China

来源：

JOURNAL OF INORGANIC MATERIALS | 2011年 / 26卷 / 01期

关键词：

ceramics; dielectric properties; microstructures; 0.9Al(2)O(3)-0.1TiO(2); aqueous gelcasting; ALUMINA; ZNO;

D O I：

10.3724/SP.J.1077.2010.10365

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 aqueous gelcasting was used to prepare 0.9Al(2)O(3)-0.1TiO(2) ceramics. The microstructures, phase compositions and microwave dielectric properties of sintered 0.9Al(2)O(3)-0.1TiO(2) ceramics were investigated. With the help of proper calcination temperature (1200 C) and continuous and slow cooling process as annealing treatment, the Al2TiO5 secondary phase was successfully eliminated. Compared with conventional dry pressing method, bigger grains, less pores and more uniform microstructures are observed in the 0.9Al(2)O(3)-0.1TiO(2) ceramics prepared by aqueous gelcasting. Therefore, much better microwave dielectric properties are obtained in the ceramics prepared by aqueous gelcasting with epsilon(r) = 10.71, Q x f = 20421GHz, tau(f) = 1.3x10(-6)/degrees C, whereas that of ceramics prepared by dry pressing are epsilon(r) = 10.89, Q x f = 11938GHz, tau(f) = 1.4 x 10(-6)/degrees C.

引用

页码：102 / 106

页数：5

共 11 条

[1] Sintered alumina with low dielectric loss [J].

Alford, NM ;

Penn, SJ .

JOURNAL OF APPLIED PHYSICS, 1996, 80 (10) :5895-5898

[2] VIBRAFORMING AND IN-SITU FLOCCULATION OF CONSOLIDATED, COAGULATED, ALUMINA SLURRIES [J].

FRANKS, GV ;

VELAMAKANNI, BV ;

LANGE, FF .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1995, 78 (05) :1324-1328

[3]

Hakki BW., 1960, IEEE. Trans. MTT, DOI DOI 10.1109/TMTT.1960.1124749

[4] Improved high-Q microwave dielectric resonator using ZnO and WO3-doped Zr0.8Sn0.2TiO4 ceramics [J].

Huang, CL ;

Hsu, CS ;

Lin, RJ .

MATERIALS RESEARCH BULLETIN, 2001, 36 (11) :1985-1993

[5] Improvement of the dielectric properties of rutile-doped Al2O3 ceramics by annealing treatment [J].

Miyauchi, Yasuharu ;

Ohishi, Yoshihiro ;

Miyake, Sinya ;

Ohsato, Hitoshi .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2006, 26 (10-11) :2093-2096

[6] Controlled temperature coefficient of resonant frequency of Al2O3-TiO2 ceramics by annealing treatment [J].

Ohishi, Y ;

Miyauchi, Y ;

Ohsato, H ;

Kakimoto, K .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 2004, 43 (6A) :L749-L751

[7]

OMATETE OO, 1991, AM CERAM SOC BULL, V70, P1641

[8] Microwave dielectric loss of titanium oxide [J].

Templeton, A ;

Wang, XR ;

Penn, SJ ;

Webb, SJ ;

Cohen, LF ;

Alford, NM .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2000, 83 (01) :95-100

[9] Preparation and electrical properties of multilayer ZnO varistors with water-based tape casting [J].

Wang, Lanyi ;

Tang, Guoyi ;

Xu, Zheng-Kui .

CERAMICS INTERNATIONAL, 2009, 35 (01) :487-492

[10] Formation of silicon nitride bonded silicon carbide by aqueous gelcasting [J].

Xie, ZP ;

Cheng, YB ;

Huang, Y .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2003, 349 (1-2) :20-28

← 1 2 →