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Method of lowering sinter temperature of (Zr0.8 Sn0.2) TiO4 ceramic

A technology of zr0.8sn0.2 and sintering temperature, applied in the field of microwave dielectric material manufacturing, can solve the problems of complex glass composition, complex preparation process, and increased dielectric loss, and achieve low cost, simple preparation process, and low sintering temperature Effect

Inactive Publication Date: 2008-11-26
镇江蓝宝石电子实业有限公司
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Problems solved by technology

ZnO-MoO published by Shi Yong et al. in "Journal of Tianjin University" No. 2, 2004 3 Add (Zr 0.8 sn 0.2 )TiO 4 It is mentioned in the article that adding a small amount of ZnO alone can reduce the sintering temperature, but the dielectric loss increases. Wu Jianqiang wrote in "Chinese Ceramics", Volume 42, Issue 3, March 2006, doping glass makes (Zr 0.8 sn 0.2 )TiO 4 The sintering temperature is lowered, but the glass composition is complicated, the preparation process is complicated, and the sintering temperature is still around 1320°C

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[0010] Example

[0011]

[0012] The present invention adopts conventional process to prepare ceramic material, and concrete process is as figure 2 , it can be seen that when the main material is doped with 4wt% lead boron glass and 3wt% Bi 2 o 3 / Li 2 O frit, when the sintering temperature is 1250°C, the dielectric properties of ceramics are the best, figure 1 It is to adopt the microstructure of the sintered material of the present invention at 1250°C, and the ceramic grains are uniform and dense. This is because the low-melting point additives first form a liquid phase to promote sintering during the sintering process, and are absorbed as the final phase at the later stage of sintering. The main crystal phase plays the role of doping modification. This "dual effect" of low-melting point additives allows lower sintering temperatures with constant or improved properties.

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Abstract

The method of lowering sinter temperature of (Zr0.8Sn0.2)TiO4 ceramic belongs to the field of microwave dielectric material producing technology. The ceramic material is prepared with (Zr0.8Sn0.2)TiO4 as main material, ZnO 0.5 wt%, MnCO3 0.3 wt% and CeO2 0.5 wt%, and through pre-sintering at 1180 deg.c for 4 hr, crushing, 200-mesh sieving and subsequent conventional ceramic preparing process. The present invention features that during the crushing and mixing, lead borate glass in 2-6 wt% and fused Bi2O3 / Li2O block in 1-5 wt% are added to lower the sintering temperature to 1230-1300 deg.c, and when lead borate glass in 4 wt% and fused Bi2O3 / Li2O block in 3 wt% are added and the sintering temperature is 1250 deg.c, best performance of the ceramic may be obtained.

Description

technical field [0001] The invention belongs to the technical field of microwave dielectric material manufacturing, in particular to a low-temperature sintered solid solution ceramic material with a high quality factor, specifically a low-(Zr 0.8 sn 0.2 )TiO 4 The method of ceramic sintering temperature. Background technique [0002] (Zr 1-x sn x )TiO 4 Ceramics have a wide range of sources, high Q value, and good temperature stability, and are widely used in various dielectric resonators and filters. (Zr 1-x sn x )TiO 4 The main crystal phase of ceramics is orthorhombic ZrTiO 4 Based on (Zr, Sn) solid solution, it has good microwave properties. When x<0.3, a single crystal (Zr 1-x sn x )TiO 4 , especially with x=0.2, namely (Zr 0.8 sn 0.2 )TiO 4 (abbreviated as ZST) material has the best microwave performance. However, the firing temperature of ZST is as high as 1380-1400°C, so how to solve the problem is an urgent problem. People want to use doping mod...

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Application Information

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IPC IPC(8): C04B35/462C04B35/63C04B35/64
Inventor 汤乐群李军金玉成黄新友
Owner 镇江蓝宝石电子实业有限公司
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