添加剂对Y2Ti2O7陶瓷的微波介电性能的影响

doi:10.3724/SP.J.1077.2010.10563

无机材料学报 ›› 2011, Vol. 26 ›› Issue (3): 327-331.DOI: 10.3724/SP.J.1077.2010.10563 CSTR: 32189.14.SP.J.1077.2010.10563

添加剂对Y₂Ti₂O₇陶瓷的微波介电性能的影响

丁佳钰 ¹ , 肖瑗 ¹ , 王哲飞 ¹ , 王丽熙 ¹ , 张其土 ¹,²

南京工业大学1. 材料科学与工程学院; 2. 江苏省无机及复合新材料重点实验室, 南京210009

收稿日期:2010-08-30 修回日期:2010-11-12 出版日期:2011-03-20 网络出版日期:2011-02-18

Effects of Additives on Dielectric Properties of Y₂Ti₂O₇ Ceramics

DING Jia-Yu¹, XIAO Yuan¹, WANG Zhe-Fei¹, WANG Li-Xi¹, ZHANG Qi-Tu¹,²

1.College of Materials Science and Engineering,Nanjing University of Technology,Nanjing 210009, China; 2.Jiangsu Provincial Key Laboratory of New Materials of Inorganic and Its Composites,Nanjing University of Technology ,Nanjing 210009, China

Received:2010-08-30 Revised:2010-11-12 Published:2011-03-20 Online:2011-02-18
About author:DING Jia-Yu (1986-), female,candidate of master.
Supported by:
Foundation item:Key University Science Research Project of Jiangsu Province (08KJA430002)

摘要/Abstract

摘要： 研究了CrO₃、Nb₂O₅、SiO₂及Al₂O₃对 Y₂Ti₂O₇ 陶瓷的烧结性能、相组成和微波介电性能的影响. 其中Nb₂O₅ 掺杂能够降低 Y₂Ti₂O₇ 陶瓷材料的烧结温度, 提高基体陶瓷的介电常数和品质因子,引起谐振频率温度系数的明显变化. 且随着Nb₂O₅含量的增多,所有样品的主晶相仍为立方烧绿石型Y₂Ti₂O₇,Nb⁵⁺可能进入烧绿石结构中, 部分取代Ti⁴⁺所在位置.实验结果表明：1mol%Nb₂O₅掺杂的陶瓷材料在 1420℃ 下烧结致密,具有最佳的微波介电性能: ε_r=61.8, Q× f =9096GHz (f=5.494GHz), τ_f=54×10 ^-⁶/℃.

关键词: 陶瓷, 晶体生长, X射线衍射, 介电性能, 改性

Abstract: The effects of CrO₃,Nb₂O₅ ,SiO₂ and Al₂O₃on the sintering characteristics,phase composition and microwave dielectric properties of Y₂Ti₂O₇ ceramics were investigated. It was found that Nb₂O₅can lower the sintering temperature, increase the permittivity and quality factor of Y₂Ti₂O₇ ceramics, and cause great change of the temperature coefficient of resonant frequency.With the increase of Nb ₂O₅ content, it illustrated that all the samples exhibited cubicpyrochlore-type Y₂Ti₂O₇ as main crystallinephase, and Nb⁵⁺ might be considered to partially substitute for Ti⁴⁺.The experimental results showed that1 mol% Nb₂O₅ doped ceramics sintered at1420℃exhibited optimum microwave dielectricproperties: ε_r=61.8, Q× f =9096 GHz (f=5.494 GHz) and τ_f=54×10 ^-⁶/℃.

Key words: ceramics, crystal growth, X-ray diffraction, dielectric properties, modification

中图分类号:

TQ174

丁佳钰, 肖瑗, 王哲飞, 王丽熙, 张其土,. 添加剂对Y₂Ti₂O₇陶瓷的微波介电性能的影响[J]. 无机材料学报, 2011, 26(3): 327-331.

DING Jia-Yu, XIAO Yuan, WANG Zhe-Fei, WANG Li-Xi, ZHANG Qi-Tu,. Effects of Additives on Dielectric Properties of Y₂Ti₂O₇ Ceramics[J]. Journal of Inorganic Materials, 2011, 26(3): 327-331.

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添加剂对Y₂Ti₂O₇陶瓷的微波介电性能的影响

Effects of Additives on Dielectric Properties of Y₂Ti₂O₇ Ceramics

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