An aluminum nitride powder having the surface treated with an organosilane represented by formula, RIaRIIbSiY4-1-b, and/or a partial hydrolysis condensate thereof to acquire excellent moisture-proof, wherein RI represents a 6-20C alkyl group or a group formed by substituting halogen atom or atoms for part or all of the hydrogen atoms attached to carbon atoms of the 6-20C alkyl group, RII represents a 1-20C hydrocarbon group or a group formed by substituting halogen atom or atoms for part or all of the hydrogen atoms attached to carbon atoms of the 1-20C hydrocarbon group, Y represents a hydrolyzable group, a is an integer of 1 to 3 and b is an integer of 0 to 2, provided that a+b is an integer of 1 to 3; and a thermally conductive grease composition comprising (A) 50-95 weight % of the aforementioned surface-treated aluminum nitride powder and (B) 5 to 50 weight % of at least one base oil selected from the group consisting of liquid silicones, liquid hydrocarbons and fluorohydrocarbon oils, and further, if desired, (C) 0-30 weight % of a thicknener selected from the group consisting of zinc oxide, alumina, boron nitride and silicon carbide powders.
一种
氮化铝粉末,其表面用式RIaRIIbSiY4-1-b代表的有机
硅烷和/或其部分
水解冷凝物处理,以获得优异的防潮性能,其中RI代表6-20C烷基或用卤素原子取代连接到6-20C烷基碳原子上的部分或全部氢原子而形成的基团、RII 代表 1-20C 碳氢基团或用卤素原子取代连接到 1-20C 碳氢基团碳原子上的部分或全部氢原子而形成的基团,Y 代表可
水解基团,a 是 1 至 3 的整数,b 是 0 至 2 的整数,条件是 a+b 是 1 至 3 的整数;和一种导热润滑脂组合物,该组合物包括(A)50-95 重量%的上述经表面处理的
氮化铝粉末和(B)5-50 重量%的至少一种选自液态
硅酮、液态烃和
氟烃油组的基础油,如果需要,还包括(C)0-30 重量%的选自
氧化锌、氧化铝、
氮化硼和碳化
硅粉末组的
增稠剂。