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分别采用无钯化学镀法和溶液聚合法制备了Ag-AlN和聚丙烯酸酯胶黏剂,并采用超声辅助溶液共混法制备了高热导率Ag-AlN/聚丙烯酸酯导电胶黏剂。采用XRD、EDS和SEM等对Ag-AlN的结构进行分析。结果表明:经过高温和酸性清洗液清洗等处理,AlN表面的杂质被除去,并且在AlN表面形成致密的Al2O3层,采用无钯化学镀法制备的Ag-AlN具有优异的电导率和热导率,其电导率由AlN的10-13 S/cm提高到了7.06×102 S/cm,热导率由AlN的170W/(m·K)提高到了230W/(m·K)。经过计算,Ag-AlN表面的Ag镀层质量分数约为13%,Ag镀层的厚度约为80nm。当导电胶黏剂中Ag-AlN填料的质量分数为50%时,Ag-AlN/聚丙烯酸酯导电胶黏剂的电导率为1.9S/cm,热导率为3.1 W/(m·K)。
Ag-AlN and polyacrylate adhesives were prepared by palladium-free electroless plating and solution polymerization, and Ag-AlN / polyacrylate conductive adhesives with high thermal conductivity were prepared by ultrasonic assisted solution blending method. The structure of Ag-AlN was analyzed by XRD, EDS and SEM. The results show that the impurities on the AlN surface are removed and the Al 2 O 3 layer is formed on the AlN surface after high temperature and acid cleaning solution cleaning. The Ag-AlN prepared by palladium-free electroless plating has excellent conductivity and thermal conductivity , The conductivity of AlN is increased from 10-13 S / cm to 7.06 × 102 S / cm, and the thermal conductivity is increased from 170W / (m · K) of AlN to 230W / (m · K). After calculation, Ag-AlN surface of the mass fraction of Ag coating is about 13%, Ag coating thickness of about 80nm. When the mass fraction of Ag-AlN filler in the conductive adhesive is 50%, the conductivity of the Ag-AlN / polyacrylate conductive adhesive is 1.9S / cm and the thermal conductivity is 3.1 W / (m · K) .