加热过程中古代铜镜表面“锡汞齐”相变分析

Phase Transition Analysis of Ancient Bronze Mirror Surface Tin Amalgam in Heating

利用可在常温至1 200℃下,对样品进行边加热边检测的θ-θ扫描(立式测角仪)密封陶瓷X射线管全自动衍射仪及X射线荧光,再结合表面形貌特征等对涂抹"锡汞齐"的高锡铜镜样品进行了检测分析,证明在加热到高于Hg的沸点时含汞物相会逐渐消失;说明铜镜或青铜器表层中有无Hg不能作为判断其是否采用过"锡汞齐"工艺的依据,并且从使用角度来看,铜镜涂抹"锡汞齐"也没有必要。

Taking advantage of θ-θ scanning（vertical goniometer） sealed and ceramic X-ray tube full-automatic diffractometer,which can be heated and detected at the same time when the temperature is between normal temperature and 1 200 ℃,and X-ray fluorescence,and combining surface feature with character,high tin bronze mirror which had been daubed ＂tin amalgam＂ was detected and analyzed.It can prove that phase with Hg will disappear gradually when the sample is heated to the temperature higher than the boiling point of Hg;It indicates that bronze surface cannot be as a proof of ＂tin amalgam＂ used whether it contains Hg,moreover,it is not necessary that bronze mirror is covered with ＂tin amalgam＂ in terms of application.