| Dielectric Properties of ZnTiO3 Microwave Ceramics Consolidated with MgTiO3 |
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| 作者姓名： | 吴霞宛 王玉梅 肖谧 |
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| 作者单位： | KEY LABORATORY OF ADVANCED CERAMICS AND MACHINING TECHNOLOGY OF EDUCATION MINISTRY SCHOOL OF ELECTRONIC INFORMATION ENGINEERING TIANJIN UNIVERSITY，TIANJIN 300072，CHINA，KEY LABORATORY OF ADVANCED CERAMICS AND MACHINING TECHNOLOGY OF EDUCATION MINISTRY SCHOOL OF ELECTRONIC INFORMATION ENGINEERING，TIANJIN UNIVERSITY，TIANJIN 300072，CHINA，KEY LABORATORY OF ADVANCED CERAMICS AND MACHINING TECHNOLOGY OF EDUCATION MINISTRY SCHOOL OF ELECTRONIC INFORMATION ENGINEERING，TIANJIN UNIVERSITY，TIANJIN 300072，CHINA |
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| 基金项目： | Supported by National Natural Science Foundation of China（ No.50172035）. |
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| 摘 要： | STABILIZED ZNTIO, WAS PREPARED BY DOPING MAGNESIUM OXIDE THROUGH TRADITIONAL SOLID-STATE REACTION. THE EXPERIMENTAL RESULTS INDICATE THAT ZINC TITANATE CRYSTALS DOPED WITH MAGNESIUM OXIDE GROW WELL AND THE DECOMPOSITION INTO ZN2TIO4 AND TIO2 IS RESTRAINED THROUGH TRADITIONAL SOLID STATE REACTION. BY ADJUSTING MOLAR RATIO OF MGO, BETTER PROPERTIES CAN BE OBTAINED. THE DIELECTRIC PROPERTIES OF THE CERAMICS DOPED WITH 30% MGO( MOLAR PERCENTAGE) SINTERED AT 1 060 ℃ ARE AS FOLLOWS:THE VALUE OF QUALITY FACTOR IS GREATER THAN 20 000(6. 5 GHZ), THE TEMPERATURE COEFFICIENT OF RESONANCE FREQUENCY IS ABOUT 2 × 10-6/℃, THE DIELECTRIC CONSTANT RANGES FROM 18 TO 22. BESIDES, IT IS PROVED THAT HEAT TREATMENT CAN OPTIMIZE MICROSTRUCTURE AND THE VALUE OF QUALITY FACTOR, WHICH INCREASES FROM 23 833.93 TO 47 584.00 AFTER 2 H OF HEAT TREATMENT AT 1 040 ℃.
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| 关 键 词： | 钛酸锌微波陶瓷 钛酸镁 热处理 品质因数 介电性能 |
| 收稿时间： | 2005-08-16 |
Dielectric Properties of ZnTiO3 Microwave Ceramics Consolidated with MgTiO3 |
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| WU Xiawan,WANG Yumei,XIAO Mi.Dielectric Properties of ZnTiO3 Microwave Ceramics Consolidated with MgTiO3[J].Transactions of Tianjin University,2006,12(1):28-32. |
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| Authors: | WU Xiawan WANG Yumei XIAO Mi |
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| Abstract: | Stabilized ZnTiO3 was prepared by doping magnesium oxide through traditional solid-state reaction. The experimental results indicate that zinc titanate crystals doped with magnesium oxide grow well and the decomposition into Zn2TiO4 and TiO2 is restrained through traditional solid state reaction. By adjusting molar ratio of MgO, better properties can be obtained. The dielectric properties of the ceramics doped with 30% MgO(molar percentage) sintered at 1 060℃ are as follows :the value of quality factor is greater than 20 000 (6.5 GHz), the temperature coefficient of resonance frequency is about 2 × 10-6/℃, the dielectric constant ranges from 18 to 22. Besides, it is proved that heat treatment can optimize microstructure and the value of quality factor, which increases from 23 833.93 to 47 584.00 after 2 h of heat treatment at 1 040 ℃. |
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| Keywords: | microwave ceramics magnesium titanate heat treatment quality factor |
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