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›› 2001, Vol. 1 ›› Issue (4): 0-0.

• 4 •    

TiO2含量对微波介质瓷ZrxTi1-xO2致密化、微结构及介电性能的影响

张淑霞, 李建保, 曹俊, 张波, 翟华嶂   

  1. 清华大学材料科学与工程系新型陶瓷与精细工艺国家重点实验室，北京 100084
  • 出版日期:2001-08-20 发布日期:2001-08-20

Effect of TiO2 Content on the Densification, Microstructure and Dielectric Properties of ZrxTi1-xO2 Microwave Dielectric Ceramics

ZHANG Shu-xia, LI Jian-bao, CAO Jun, ZHANG Bo, ZHAI Hua-zhang   

  1. State Key Lab. New Cerram. & Fine Proc., Dept. Mat. Sci.& Eng., Tsinghua Univ., Beijing 100084, China
  • Online:2001-08-20 Published:2001-08-20

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摘要： 制备了一系列ZrxTi1-xO2(x =0.40~0.60)微波介质瓷，对其致密化、微结构及介电性能进行了研究. XRD物相分析样品为单一均相的ZrTiO4. 在相同的烧结温度下，TiO2含量越高，样品越不易致密，相对密度越低，晶粒越易长大. 样品的相对密度越高，其介电常数和品质因数越大. 相对密度高于90%时，对样品介电性能的影响可以忽略，成份起主导作用. 随着TiO2含量增加，样品的介电常数增大，品质因数降低.

关键词: 微波介质瓷, 钛酸锆, 致密化, 微结构, 介电性能

Abstract: Ceramic samples of ZrxTi1-xO2 with x=0.40~0.60 were prepared from powders made by the coprecipitation method. The densification, microstructure and dielectric properties of sintered bodies were investigated. The results indicated that the composition affected the densification. The increase of TiO2 content led to larger gain size and lower relative density. The dielectric properties of sintered bodies were affected by the relative density and the composition. As the relative density increased, both the dielectric constant and the quality factor increased. The dielectric constant and the quality factor were primarily influenced by the composition and virtually independent of relative density for densities greater than 90% theoretical. The effects of relative density could be neglected. With the increase of TiO2 content, the dielectric constant increased, whereas the quality factor decreased.

Key words: microwave dielectric ceramics, zirconium titanate, densification, microstructure, dielectric properties

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