古代陶范原料配方含有草木灰的化学判断方法

Method for Chemical Discrimination of Plant Ash in Row Materials of Ancient Chinese Pottery-moulds

通过模拟试验,烧制一批添加不同含量草木灰的陶范,应用其特征元素指标Ca/Al、K/Al、Mg/Al、P/Al、Mn/Al等5对元素含量比值分析古代陶范原料中草木灰的添加情况。模拟陶范成分分析表明,草木灰添加量越多,Ca/Al、K/Al、Mg/Al、P/Al、Mn/Al等5对元素含量比值增加。陶器烧制不需要添加草木灰,其成分可视为古代陶范的黏土原料成分,通过统计分析古代陶器和陶范,可以判断古代陶范含有较多的草木灰。对比不同遗址不同时代的陶器和陶范中5对元素含量比值,可以认为草木灰是古代陶范原料配方的重要组成部分。

By simulation experiments, a set of pottery-moulds were fired, in which distinctive content of plant ash was added to the raw materials. Then the chemical components of pottery-moulds were analyzed to find chemical characters of plant ash added. And the values of Ca/Al, K/Al, Mg/Al, P/Al, Mn/Al were used as chemical characteristic index for the discrimination of plant ash in row materials. Analytical results of components in simulated pottery-moulds showed that when the quantity of plant ash increased, the values of Ca/Al, K/Al, Mg/Al, P/Al, Mn/Al increased. However, the most of the ancient pottery-firing processes don＇t have the plant ash as raw material and the chemical components could be considered as the clay of the raw material of ancient potteries. Statistical data for the analysis of the ancient potteries and ancient pottery-moulds showed that the plant ash content in the raw materials of ancient pottery-moulds was higher than that in ancient potteries. The comparison of values of Ca/Al, K/Al, Mg/Al, P/Al, Mn/Al between ancient potteries across China and pottery-moulds from different periods and provenances implied that plant ash may be an important eonstitutent of ancient pottery-moulds.