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BaCu(B_2O_5)助烧剂对CaO-Li_2O-Sm_2O_3-TiO_2微波介质陶瓷介电性能的影响(英文)
作者:王颖 黄金亮 顾永军 李谦  
单位:河南科技大学材料科学与工程学院  
关键词:微波介质陶瓷  助烧  介电性能  液相烧结 
分类号:TQ174.1
出版年,卷(期):页码:2008,36(12):1700-1704
DOI:
摘要:

16CaO-9Li2O-12Sm2O3-63TiO2(CLST)陶瓷的烧结温度接近1 300℃,添加BaCu(B2O5)(BCB)陶瓷粉体使CLST陶瓷的烧结温度降至1 050℃。随着烧结温度的升高,样品的体积密度先升高而后趋于稳定,添加质量分数为4%BCB的CLST陶瓷在1 050℃烧结后得到96%的相对密度。相对介电常数(εr)随着BCB添加量的增大先增大后略有减小。由于液相的存在,介电损耗(tanδ)随着BCB添加量的增大而增大。谐振频率温度系数(τf)与纯CLST陶瓷相比更加近零。添加质量分数为4%BCB的CLST陶瓷在1 050℃烧结2 h后得到良好的介电性能:εr=81,tanδ=0.021,τf=0.5×10-6/℃(1 MHz)。

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The sintering temperature of 16CaO–9Li2O–12Sm2O3–63TiO2(CLST) ceramics was approximately 1 300 ℃,which was efficiently decreased with different amounts of BaCu(B2O5)(BCB) ceramic powder addition.The bulk density of the specimens in-creased and reached saturation with increasing temperature,and a high relative density about 96% was obtained for the 4%(in mass) BCB-added CLST ceramics sintered at 1 050 ℃ for 2 h.The relative dielectric constant(εr) increased initially and then decreased slightly with increasing BCB content.The dielectric loss(tanδ) value increased with the addition of BCB because of the presence of the liquid phase.The temperature coefficients of the resonance frequency(τf) value were closer to zero in comparison with the pure CLST ceramic.Good dielectric properties of εr = 81,tanδ = 0.021 and τf = 0.5 × 10–6/℃(1 MHz) were obtained for the 4% BCB-added CLST ceramics sintered at 1 050 ℃ for 2 h.

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基金项目:
河南省杰出青年基金(074100510008);; 河南省国际科技合作计划(0346620012)资助项目
作者简介:
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参考文献:

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