Al2O3添加量对Li2ZnTi3O8陶瓷微波介电性能的影响

doi:10.19976/j.cnki.43-1448/TF.2022072

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摘要采用固相反应法合成Li₂ZnTi₃O₈,然后添加Al₂O₃(添加量为Li₂ZnTi₃O₈质量的0~7%)制备Al₂O₃/Li₂ZnTi₃O₈复合微波介电陶瓷,研究Al₂O₃添加量对复合陶瓷微观结构与介电性能的影响。结果表明,复合陶瓷主相为立方结构Li₂ZnTi₃O₈,随Al₂O₃添加量增加,逐渐生成ZnAl₂O₄和TiO₂第二相,这2种物质对陶瓷的微波介电性能有很大影响。Al₂O₃的添加可抑制Li₂ZnTi₃O₈晶粒的生长。烧结温度为1 100 ℃、Al₂O₃添加量为1%时,Al₂O₃/Li₂ZnTi₃O₈复合微波介电陶瓷获得最佳介电性能,介电常数ε_r≈ 26.1,Q×f ≈ 87 900 GHz,谐振频率温度系数τ_f≈ 13.3×10^-6 ℃^-1。

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	董清臣
	刘昆磊
	于仕辉
	刘献省
	张伟风

关键词 ：微波介电陶瓷, Li₂ZnTi₃O₈, Al₂O₃, 添加量, 介电性能

Abstract：Li₂ZnTi₃O₈ was synthesized by solid-state reaction. The microwave dielectric ceramics composed of Li₂ZnTi₃O₈ and Al₂O₃ were prepared (The Al₂O₃ mass is 0-7% of Li₂ZnTi₃O₈ mass). The effects of Al₂O₃ addition amount on the microstructures and dielectric properties of the samples were investigated. The results show that the primary phase of the composite ceramics is cubic structure Li₂ZnTi₃O₈. ZnAl₂O₄ and TiO₂ phases are observed with the increase of Al₂O₃ addition amount, which have a great influence on the microwave dielectric properties of the ceramic samples. The addition of Al₂O₃ can inhibit the growth of Li₂ZnTi₃O₈ grains. When the sintering temperature is 1 100 ℃ and the Al₂O₃ addition is 1%, the microwave dielectric ceramics composed of Li₂ZnTi₃O₈ and Al₂O₃ obtain the best dielectric properties: ε_r≈ 26.1, Q×f ≈ 87 900 GHz, τ_f≈13.3×10^-6℃^-1.

Key words： microwave dielectric ceramics Li₂ZnTi₃O₈ Al₂O additive amount dielectric property

收稿日期: 2022-08-25 出版日期: 2023-03-23

ZTFLH:

TM28

基金资助:国家自然科学基金资助项目(11974099); 河南省科技攻关项目(212102210277)

通讯作者: 董清臣,副教授,硕士。15993575097;E-mail: qing991208@126.com

引用本文:

董清臣, 刘昆磊, 于仕辉, 刘献省, 张伟风. Al₂O₃添加量对Li₂ZnTi₃O₈陶瓷微波介电性能的影响[J]. 粉末冶金材料科学与工程, 2023, 28(1): 28-34.
DONG Qingchen, LIU Kunlei, YU Shihui, LIU Xiansheng, ZHANG Weifeng. Effect of Al₂O₃ addition on microwave dielectric properties of Li₂ZnTi₃O₈ ceramics. Materials Science and Engineering of Powder Metallurgy, 2023, 28(1): 28-34.

链接本文:

http://pmbjb.csu.edu.cn/CN/10.19976/j.cnki.43-1448/TF.2022072 或 http://pmbjb.csu.edu.cn/CN/Y2023/V28/I1/28

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