利用浓硫酸、高锰酸钾等强氧化剂制备了氧化石墨,将其与钛酸钡和环氧树脂复合,制备了三相复合材料.研究了氧化石墨的添加量对于复合材料介电性能的影响.结果发现在氧化石墨的添加量很少时,三相复合材料的介电常数显著地高于钛酸钡/环氧树脂两相复合材料,同时介电损耗仍然维持在较低的水平.钛酸钡/环氧树脂的介电常数为17.7 (20℃,1 kHz),当加入3wt％氧化石墨,介电常数增加到42.6,介电损耗为0.043.因此该三相复合材料适合用于埋入式电容器的介质材料.最后初步探讨了氧化石墨对复合材料介电性能的影响机理.
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