石英のα-β相転移温度に影響を及ぼす諸因子に関する基礎的研究 : I. 面欠陥の影響

概要

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The plane defect generation quartz sample was prepared by grinding the synthetic crystal. Using the quartz sample, the effect of the defect on crystallite size, specific heat capacity Cp, and phase transition temperature was measured. The change with the increase in defect content was observed as follows : (1) decrease of crystallite size, (2) increase of specific heat capacity Cp, (3) lowering of α→β phase transition start temperature Thb, (4) rise of β→α phase transition start temperature Tcb, (5) increase in difference between Thb and Tcb (Δ Tb = Tcb- Thb). Since the defect contributes by the both direction of α→β and β→α phase transition as an active site, it was proven that ΔTb became one of the indexes which show the defect density. The mutual relationships between the defect and these properties were discussed.
日本粘土学会の論文
2008-08-12