刘家沟钧釉中的金属铜

METALLIC COPPER IN THE JUN GLAZE OF LIU JIA GOU

用光学显微术和电子显微术研究了河南禹县神垕镇刘家沟的钧瓷标本。发现在釉中含有直径达350μm的显微以及亚显微尺寸的金属铜颗粒。无数的亚显微铜粒在暗场显微镜下呈金黄色散射并略带微红色调,肉眼观察则呈灰红色。估计金属铜可能以铜屑或杂质存在作为钧釉红斑着色的一种原料来源。铜对钧釉着色的机理也可能不只一种。 首次发现钧釉有两液相分离的穿插结构和第二次液相分离的现象。

Samples of Jun ware of Liu Jia Gou, Yu County, Henan Province, were studied by means of optical microscopy and electron microscopy. It is found that, in the giaze, there are metallic copper particles of diameter up to 350μm and some of micro-, even submicro-dimensions. A lot of submicro copper particles give a golden scattering light with slight pink hue in the dark field of optical microscope and a greyish red colour in visual observation. It is estimated that metallic copper may exist in the form of copper dusts or impurities acting as a source of red coloring agent.The coloring mechanism of copper in Jun glaze may be different in different cases.It is found for the first time that there are interpenetrating phase-separation structure and secondary phase-separation phenomenon in the Jun glaze.