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230 W/(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80 nm.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1.9 S/cm,热导率为3.1 W/(m·K).
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