Rationales in Old World Base Glass Compositions
Rationales in Old World Base Glass Compositions
复制标题
旧世界基础玻璃成分的基本原理
DOI：
10.1006/jasc.1999.0620
复制
发表时间：
2000
影响因子：
2.8
通讯作者：
T. Rehren
中科院分区：
文献类型：
--
作者：
T. Rehren
摘要众所周知，大多数埃及和罗马的基础玻璃成分在其化学成分中显示出非常小的分散。通过绘制适当减少的基础玻璃组合物在三元相图中，它表明，由组成分散定义的组成字段是密切相关的共晶区域内的相关相图。这被解释为是由于共晶熔融状态，即在结晶缓冲剂或残余物存在下的部分熔融，而不是主要是严格的配方和原材料控制的结果。此外，它表明，可能有两个独立的熔融温度指标相关，表明熔融温度和熔体组成之间的事实关系。这些证据被用来为这些早期玻璃开发一个“部分批次熔化模型”，而不是中世纪和早期现代玻璃的“全批次熔化模型”。这个模型的一些考古意义进行了简要讨论。
Abstract It is long known that most Egyptian and Roman base glass compositions show a remarkably small scatter in their chemical composition. By plotting appropriately reduced base glass compositions in ternary phase diagrams it is demonstrated that the compositional fields defined by the compositional scatter are closely related to eutectic regions within the relevant phase diagrams. This is interpreted as to be due to an eutectic melting regime, i.e. partial melting in the presence of a crystalline buffer or residuum, and not primarily a result of strict recipe and raw material control. Furthermore, it is demonstrated that possibly two independent melting temperature indicators are correlated, suggesting a factual relationship between melting temperature and melt composition. This evidence is taken to develop a “partial batch melting model” for these early glasses, as opposed to the “total batch melting model” of Mediaeval and early modern glasses. Some archaeological implications of this model are briefly discussed.