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《工程塑料应用》 2019年第08期
DOI:10.3969/j.issn.1001-3539.2019.08.004
PVDF/CaCu(3-x)MgxTi4O12复合材料制备及介电性能
杜月,蔡会武,王行行,石凯,陈守丽,田珂,刘圣楠
西安科技大学化学与化工学院,西安 710054 
Preparation and Dielectric Properties of PVDF/CaCu(3-x)xTi4O12 Composite
Du Yue, Cai Huiwu, Wang Hanghang, Shi Kai, Chen Shouli, Tian Ke, Liu Shengnan
College of Chemistry and Chemical Engineering, Xi'an University of Science and Technology, Xi'an 710054, China 
摘要:通过溶胶-凝胶法制备了CaCu3Ti4O12(CCTO),CaCu(3-x)MgxTi4O12(CCMTO,x=0.02,0.1,0.2)陶瓷颗粒,以聚偏氟乙烯(PVDF)为基体,采用机械共混热压制备了PVDF/CCMTO复合材料。研究了CCMTO煅烧温度和Mg2+掺杂量对PVDF/CCMTO复合材料介电性能、击穿电压、储能密度的影响,以及CCTO填充量对PVDF/CCTO复合材料拉伸强度的影响。结果表明,当煅烧温度为700℃时,陶瓷颗粒粒径较小且分布较窄,复合材料介电性能较好,Mg2+掺杂后增大了CCTO陶瓷颗粒的晶粒尺寸,当x=0.1时,复合材料的介电常数可以到达96,介电损耗为0.21(填料含量为60%,常温,100 Hz时),此时PVDF/CCMTO储能密度达到1.284 J/cm3,相比于PVDF/CCTO储能密度提高了一倍。在相同填充量下击穿电压几乎相差不大。PVDF/CCMTO相比于PVDF/CCTO介电常数提高了71%,介电损耗几乎不变,Mg2+掺杂显著提高了PVDF/CCTO复合材料的介电性能。当CCTO填充量为50%时,复合材料出现团聚现象,PVDF/CCTO复合材料随CCTO填充量的增加,拉伸强度不断下降。 
Abstract:CaCu3Ti4O12(CCTO) and CaCu(3-x)MgxTi4O12 (CCMTO, x=0.02, 0.10, 0.20) ceramic particles were prepared by sol-gel method. PVDF/CCMTO composite material was prepared by mechanical mixing and hot pressing with polyvinylidene fluoride (PVDF). The effects of CCMTO calcination temperature and Mg2+ doping amount on the dielectric properties, breakdown voltage and storage density of PVDF/CCMTO composites, and the effect of CCTO filling on the tensile strength of PVDF/CCTO composites were investigated. The results show that when the calcination temperature is 700℃, the ceramic particles have smaller particle size and narrower distribution, and the dielectric properties of the composites are better. After Mg2+ doping, the grain size of CCTO ceramic particles is increased. When x=0.1, the dielectric constant of the composite can reach 96, the dielectric loss is 0.21 (filler content is 60%, at room temperature, 100 Hz), and the energy storage density of PVDF/CCMTO reach to 1.284 J/cm3, which is enhanced 1 times compared to PVDF/CCTO. The breakdown voltage is almost the same at the same fill amount. The dielectric constant of PVDF/CCMTO improve by 71% compared to PVDF/CCTO, and dielectric loss is almost unchanged. Mg2+ doping significantly improves the dielectric properties of PVDF/CCTO composite. When CCTO filling amount is 50%, the agglomeration of the composites occur, and the tensile strength of PVDF/CCTO composites decrease with the increase of CCTO loading. 
关键词:钛酸铜钙;掺杂;介电性能;聚偏氟乙烯;储能密度 
Keywords:CCTO; doping; dielectrical property; polyvinylidene fluoride; energy storage density 
本文引用格式:
杜月,蔡会武,王行行,等.PVDF/CaCu3Ti4O12复合材料的制备及介电性能研究[J].工程塑料应用,2019,47(8):16-22.
Du Yue,Cai Huiwu,Wang Hanghang,et al. Preparation and dielectric properties of PVDF/CaCu3Ti4O12 composite[J]. Engineering Plastics Application,2019,47(8):16-22. 

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