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Full-Text Articles in Engineering
Solid Transformations And Premelting Phenomena In Fluorite Structures And The System Srcl₂Bacl₂, Damri Sukhotanang
Solid Transformations And Premelting Phenomena In Fluorite Structures And The System Srcl₂Bacl₂, Damri Sukhotanang
Doctoral Dissertations
"Thermal expansion and phase transformations in CaF2, BaF2, SrCl2, and BaCl2 were studied by high temperature x-ray diffractometry, differential thermal analysis, and thermodilatometric analysis. Thermal expansion characteristics of CaF2, BaF2 and SrCl2 are very similar. The structures expand normally at lower temperatures and depart substantially from linearity at higher temperatures, because of formation of defects and disordering of anions. At high temperatures CaF2 and BaF2 react with water vapor, even at low humidities, forming oxides and emitting HF, leading to difficulty in observation of phase transformations. SrCl …
Phase Equilibria And Transformations In Potassium Sulfate, Chromate, Molybdate, And Tungstate, Roy Richard Ramey
Phase Equilibria And Transformations In Potassium Sulfate, Chromate, Molybdate, And Tungstate, Roy Richard Ramey
Doctoral Dissertations
"Thermal expansion and transformations of K2SO4, K2CrO4, K2MoO4, and K2WO4 were studied by high temperature diffractometry, differential thermal analysis, and dilatometry. K2SO4 and K2CrO4 transform from an orthorhombic to a hexagonal structure at 580°C and 670°C respectively, with initiation of the transformation probably related to increased amplitude of S-O tetrahedral vibrations. K2MoO4 and K2WO4 transform from a monoclinic to an orthorhombic structure at 300° and 370°C respectively. A minor K2MoO4 …