Dielectric properties of three ceramic/epoxy composites
Dielectric properties of three ceramic/epoxy composites
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DOI：
10.1016/j.matchemphys.2004.01.003
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发表时间：
2004-05
影响因子：
4.6
通讯作者：
D. Kuo;C. Chang;Te-Yeu Su;Wun-Ku Wang;Bin-Yuan Lin
中科院分区：
文献类型：
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作者：
D. Kuo;C. Chang;Te-Yeu Su;Wun-Ku Wang;Bin-Yuan Lin
正在研究三种陶瓷/环氧树脂复合材料。陶瓷填料包括自行合成的BaTiO 3和商品BaTiO 3和Pb（Mg 1/3 Nb 2/3）O3。讨论了填料配比、测试温度和频率对三种复合材料介电性能的影响。自行合成的BaTiO 3/环氧树脂复合材料具有最好的介电性能。其40%的填料复合材料的介电常数为44，这是高于商业钛酸钡和铅（Mg 1/3 Nb 2/3）O3复合材料的27和24，分别。在环氧树脂中形成的大的陶瓷聚集体是自合成的BaTiO 3/环氧树脂复合材料具有44的较高介电常数的原因。复合材料的介电常数与陶瓷填料的体积比成正比，并在不同的测试温度和频率下保持恒定。对于BaTiO_3/环氧树脂复合材料，浆料浇铸或丝网印刷的制备工艺对其孔隙率有影响。具有低孔隙率的复合材料导致低介电损耗角正切。
Three ceramic/epoxy composites were under investigation. The ceramic fillers include self-synthesized BaTiO3and commercial BaTiO3and Pb(Mg1/3Nb2/3)O3. Effects of the filler ratio and testing temperature and frequency on the dielectric properties of these three composites were discussed. The self-synthesized BaTiO3/epoxy composite had the best dielectric property. Its 40%-filler composite had a dielectric constant of 44, which was higher than those of 27 and 24 for the commercial BaTiO3and Pb(Mg1/3Nb2/3)O3composites, respectively. The large ceramic aggregates formed in epoxy are the reason for the self-synthesized BaTiO3/epoxy composite having a higher dielectric constant of 44. Composite dielectric constant was proportional to the volume ratio of the ceramic filler and remained constant at different test temperatures and frequencies. For the BaTiO3/epoxy composites, the fabrication process of slurry-casting or screen-printing can have an effect on their porosity. The composites with a low porosity lead to a low dielectric loss tangent.