推荐回答(2个)
汉代铜镜既不是黄铜也不是紫铜,而是青铜。
1、黄铜:是由铜和锌所组成的合金。
2、紫铜:因呈紫红色而得名。它不一定是纯铜,有时还加入少量脱氧元素或其他元素以改善材质和性能,因此也归入铜合金。
3、青铜:是在纯铜中加入锡或铅的合金,有特殊重要性和历史意义,与纯铜相比,青铜强度高且熔点低(25%的锡冶炼青铜,熔点就会降低到800℃。纯铜的熔点为1083℃)。青铜铸造性好,耐磨且化学性质稳定。
两汉时期铜镜的合金比例是比较稳定的,铜的含量为66%~70%,锡23%~24%,铅4%~6%。由于汉镜含锡量高,有利于镜表面的抛光。铜镜中加人一定量的铅,是因为铅溶液环流状态良好,有利于热溶液的平均流注,有助于镜面干整,减少气泡,提高铸造文字和花纹的清晰度。

汉代铜镜是黄铜。
两汉时期包括西汉、新莽、东汉,是中国统一多民族封建国家的强盛时期,经济和文化都达到了前所未有的高度,各个方面都为汉民族文化的形成奠定了基础。当时陶瓷业的进步和漆器的发展,虽然代替了青铜器皿在人们日常生活中的地位,但制铜工艺并没有衰退,而是转向了制造铜镜等方面。因此,两汉时期铜镜的铸制业获得了重大发展,出现了新的高潮。
两汉铜镜已发展成一般商品,这时期官方和私营铸镜业都得到了普遍的发展。汉镜铭文中出现的许多“尚方”铭及纪氏铭,充分说明了这一点。“尚方”是汉代为皇室制作御用物品的官署,属少府。《汉书·百官公卿表》中的少府下有“尚方”。颜师古注:“尚方主作禁器物。”《后汉书?百官志》:“尚方令一人,六百石。本注:‘掌上手工作御刀创诺好器物,亟—人。’”铜镜铭文中大量出现的“尚方作镜真大好”、“尚方作镜四夷服”等字句表明,制作铜镜也是尚方的任务之纪氏铭如:“王氏作镜真太好”、“朱氏明镜快人意”、“田氏作镜四夷服”等,都明确记述了制作者的姓氏,并有很强的宣传广告作用,表明民间铸镜业已十分普及。
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