Phase transitions among four BiB3O6 polymorphs: a detailed investigation

• DOI: 10.1039/b903567m
• Publication Date: 2009-05-28T11:00:19Z
• Authors: Rihong Cong; Jinlong Zhu; Yingxia Wang; Tao Yang; Fuhui Liao; Changqing Jin; Jianhua Lin
• Keywords: Metastability; Atmospheric temperature range; Chemical Stability

The stability and phase transformations of the four BiB3O6 polymorphs, i.e., α-, β-, γ- δ-BiB3O6, were investigated under different temperatures pressures. β-BiB3O6 is a metastable which can only be obtained by boric acid flux method in sealed system at low temperature. other are thermodynamic stable phases. Owing to large kinetic effect, polymorphs generally slow, thus an extensive annealing process was used this study. study shows that α-BiB3O6 high-temperature its area narrow (710–715 °C) atmospheric conditions, while γ-BiB3O6 intermediate temperature range (∼680–710 °C). results also confirm δ-BiB3O6 high-pressure all may transfer δ-phase high pressure. However, α- or relatively ambient Therefore, regarded as low-temperature system. Based on experimental results, well principles, pressure–temperature (P–T) diagram for proposed.