| BaCu(B_2O_5)助烧剂对2.5ZnO-2.5Nb_2O_5-5TiO_2微波介质陶瓷介电性能的影响 |
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| 引用本文： | 孙露,黄金亮,路晓辉,韩香菊. BaCu(B_2O_5)助烧剂对2.5ZnO-2.5Nb_2O_5-5TiO_2微波介质陶瓷介电性能的影响[J]. 硅酸盐学报, 2009, 37(11) |
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| 作者姓名： | 孙露 黄金亮 路晓辉 韩香菊 |
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| 作者单位： | 河南科技大学材料科学与工程学院,河南,洛阳,471003 |
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| 基金项目： | 河南省杰出青年科学基金，河南省国际科技合作计划，河南省科技发展计划 |
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| 摘 要： | 研究了烧结助剂BaCu(B2O5)(BCB)对2.5ZnO-2.5Nb2O5-5TiO2(ZNT)陶瓷的微观结构、烧结特性及介电性能的影响。结果表明:当烧结温度高于900℃时,添加BCB的陶瓷片的致密度高于纯ZNT的致密度。介电常数(εr)随着BCB添加量的增加先增大后略有减小。由于液相的存在,品质因数和谐振频率的积(Qf)随着BCB添加量的增大而减小。谐振频率温度系数(τf)与纯ZNT陶瓷相比更接近零。添加质量分数为3%BCB的ZNT陶瓷在900℃烧结3h后得到良好的介电性能:εr=48,Qf=15258GHz,τf=41×10-6/℃(5GHz)。
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| 关 键 词： | 微波介电陶瓷 氧化锌-氧化铌-氧化钛 介电性能 液相烧结 |
EFFECTS OF BaCu(B_2O_5)ADDITIVE ON DIELECTRIC PROPERTIES OF 2.5ZnO-2.5Nb_2O_5-5TiO_2 MICROWAVE DIELECTRIC CERAMICS |
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| SUN Lu,HUANG Jinliang,LU Xiaohui,HAN Xianju. EFFECTS OF BaCu(B_2O_5)ADDITIVE ON DIELECTRIC PROPERTIES OF 2.5ZnO-2.5Nb_2O_5-5TiO_2 MICROWAVE DIELECTRIC CERAMICS[J]. Journal of The Chinese Ceramic Society, 2009, 37(11) |
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| Authors: | SUN Lu HUANG Jinliang LU Xiaohui HAN Xianju |
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| Abstract: | The effects of BaCu(B_2O_5)(BCB)addition on the microstructure and microwave dielectric properties of 2.5ZnO-2.5Nb_2O_5-5TiO_2(ZNT)ceramics were investigated.The bulk density of the specimens is higher than that of pure ZNT specimens when the sintering temperature is above 900℃.The dielectric constant εr increases initially and then decreases slightly with the increase of BCB content.The product of quality factor and resonance frequency of Qf value degrades with the addition of BCB because of the presence of the liquid phase in the sintering.The temperature coefficient of the resonance frequency Tf is effectively lowered compared with the pure ZNT specimens.The 3% in mass BCB-added ZNT ceramics sintered at 900℃ for 3 h have good dielectric propertiesof ε_r=48,Qf=15258GHz,and τ_f=41×10~(-6)/℃at 5 GHz. |
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| Keywords: | microwave dielectric ceramics zinc oxide-nobium oxide-titania dielectric properties liquid phase sintering |
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