کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1332159 979032 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Phase transitions of LiAlO2 at high pressure and high temperature
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Phase transitions of LiAlO2 at high pressure and high temperature
چکیده انگلیسی

This work presents a comprehensive study on phase transitions in LiAlO2 system at high pressures and temperatures (0.5–5.0 GPa and 300–1873 K, respectively), as well as the phase stability for polymeric phases of LiAlO2 in the studied P–T space by X-ray diffraction (XRD). Besides the previously described polymorphic hexagonal α-phase, orthorhombic β-phase and tetragonal δ-phase, a possible new phase of LiAlO2 was observed after the tetragonal γ-LiAlO2 sample was treated at 5.0 GPa and 389 K. The stable regimes of these high-pressure phases were defined through the observation of coexistence points of the polymeric phases. Our results revealed that LiAlO2 could experience structural phase transitions from γ-LiAlO2 to its polymorphs at lower pressures and temperatures compared to the reported results. Hexagonal α-LiAlO2 with highly (003) preferential orientation was prepared at 5.0 GPa and 1873 K.

Constructing the pressure–temperature phase diagram for LiAlO2Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Solid State Chemistry - Volume 181, Issue 8, August 2008, Pages 1810–1815
نویسندگان
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