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    型材散热器的散热材质


    型材散热器中散热片材质是指散热片所使用的具体材料。每种材料其导热性能是不同的,按导热性能从高到低排列,分别是银,铜,铝,钢。不过如果用银来作散热片会太昂贵,?#39318;?#22909;的方案为采用铜质。虽然铝便宜得多,但显然导热性就不如铜好(大约只?#22411;?#30340;百?#31181;?#20116;十多点)。
    常用的散热片材质是铜和铝合金,二者各有其优缺点。铜的导热性好,但价格较贵,加工难度较高,重量过大(很多纯铜散热器都超过了CPU对重量的限制),热容量较小,而且容易氧化。而纯铝太软,不能直?#37038;?#29992;,都是使用的铝合金才能提供足够的硬度,铝合金的优点是价格低廉,重?#22771;幔?#20294;导热性比铜就要差很多。有些散热器就各取所长,在铝合金散热器底座上嵌入一片铜板。


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