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中温制备钛酸钕钙-钛酸钕锂系高介微波陶瓷 被引量：1

Preparation of High ε_r Microwave Ceramics of CNT-LNT System Sintered at 1 200℃
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摘要 将温度系数相反的钛酸钕钙(CNT)和钛酸钕锂(LNT)进行复合,中温下(1200℃)烧结获得了εr>100的CNT-LNT微波介质陶瓷。该陶瓷为斜方结构的CaTiO3基固溶体单相。介电常数随x增加先增加后减小,在x=0.5处最大。Q.f值和谐振频率温度系数随LNT含量增加而线性下降。中温下制备了性能良好的CNT-LNT系微波介质陶瓷,如x=0.6时微波性能为:εr=123.9,Q.f=1500GHz,τf=12.0×10–6℃–1。 High εr microwave dielectric ceramics of CNT-LNT system were prepared at 1 200℃. Microwave dielectric properties and crystal structure were investigated with respect to LNT content. A complete solid solution with orthorhombic CaTiO3-type perovskite formed within the entire investigation composition range. The εr increased till to x = 0.5, and then decreased. Q of value and temperature coefficient of resonant frequency decreased gradually as LNT content increased. Microwave dielectric properties of some CNT-LNT system ceramics is as following： x=0 （εr= 107.7, Q·f= 11 455 GHz, τf= 236.7×10^-6℃^-1）.
作者 郑兴华 陈湘明 梁柄亮
机构地区 福州大学材料学院 浙江大学材料与化工学院
出处 《电子元件与材料》 CAS CSCD 北大核心 2005年第9期5-7,共3页 Electronic Components And Materials
基金 国家杰出青年科学基金资助项目(No.50025205) 福州大学校人才基金资助项目(No.XJY-0413)
关键词 无机非金属材料 微波介质陶瓷 高介电常数 钙钛矿 低温烧结 microwave dielectric ceramics high dielectric constant perovskites low temperature sintering
分类号 TM28 [一般工业技术—材料科学与工程]
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参考文献9

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二级参考文献33

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共引文献13

同被引文献9

  • 1郑兴华,俞建长,汤德平.高介电常数微波介质陶瓷[J].山东陶瓷,2004,27(6):28-32. 被引量：14
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  • 3Laffcz P, Dcsgardin G and Ravcnau B, Microwave dielectric properties of doped Ba6-x(Sm1-y Ndy)8+2x/3Ti18O54 oxides [J]. J Mater Sci, 1995, 30:267-273.
  • 4Ohsato H, Kato H, Mizuta M, et al. Microwave dielectric properties of the Ba6-3x(Sm1-y, Ry)8+2xTi18O54 (R = Nd and La) solid solutions with zero temperature coefficient of the resonant frequency [J]. Jpn J Appl Phys, 1995,34:5413-5417.
  • 5Chen X M, Qin N, Li Y. Microstructures and microwave dielectric characteristics of Ba6-3x(Sm1-yLay)8+2xTi18O54 solid solutions (x = 2/3 and 0.75) [J]. J Electroceram, 2002, (9): 31-35.
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电子元件与材料
2005年 第9期

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