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采用反向沉淀法制备了Mg(OH)2-ZnO纳米粒子,通过原位聚合和热亚胺化的方法成功制备了不同纳米Mg(OH)2-ZnO粒子质量分数的纳米Mg(OH)2-ZnO/Polyimide(PI)复合薄膜,通过SEM,热重分析,介电谱测试仪,击穿场强测试仪对薄膜的表面形貌、热稳定性、介电性能和击穿强度进行表征和测试。结果表明:Mg(OH)2-ZnO纳米粒子均匀地分散在PI基体中,Mg(OH)2-ZnO/PI热稳定性下降,介电常数、介电损耗和电导率提高,击穿场强随纳米粒子含量的增加先增大后减小,在纳米粒子含量为2%时达到最大值296kV/mm。
Mg (OH) 2-ZnO nanoparticles were prepared by reverse precipitation method. Nanometer Mg (OH) 2-ZnO nanoparticles with different Mg (OH) 2-ZnO particle sizes were successfully prepared by in situ polymerization and thermal imidization -ZnO / Polyimide (PI) composite thin films. The surface morphology, thermal stability, dielectric properties and breakdown strength of the films were characterized by SEM, TGA, Dielectric Spectroscopy and Breakdown Field Tester. test. The results show that the thermal stability of Mg (OH) 2 -ZnO / PI is decreased, the dielectric constant, dielectric loss and conductivity are improved. The breakdown field strength With the increase of the content of nano-particles, the content of nano-particles first increases and then decreases, reaching 296kV / mm at the maximum of 2%.