نتایج جستجو برای: cristobalite
تعداد نتایج: 356 فیلتر نتایج به سال:
Interfacial reaction between quartz and potassium silicate glass was studied at both 900 °C 1000 °C. The results showed that no phase transformation observed for the pure or Instead, particles in K2O-SiO2 glass, from to cristobalite occurred quartz/glass interface first, then crystals transformed into tridymite. tridymite formed became site of heterogeneous nucleation, which induces plenty prec...
Zeolites are a family of open-framework aluminosilicate minerals used in many diverse fields, including building materials, agriculture, water treatment, and catalysis. In this study, natural zeolites were mechano-chemically treated by co-milling with corundum cristobalite. The idea behind the study was that high-hardness oxides would cause zeolite to undergo more structural distortion, potenti...
The results of petrographic studies structure formation and the phase composition developed aluminophosphate refractory adhesive compositions Al 2 O 3 *-Cr -H PO 4 at different temperatures with addition clay components are presented. It has been established that polarizing cristobalite tridymite AlPO4 crystals rhombic modification observed in fired samples, which thermally stable compounds pro...
Mehrabad bentonite deposit appears to be derived from the volcano- sedimentary materials of Oligo-Miocene age by transformation in a lagoon environment. Based on analysis, bentonite samples contain minerals such as montmorillonite, albite, clinoptilolite, quartz, cristobalite, calcite, gypsum, halite, muscovite and nantronite. Conversion of shard glasses to bentonite and zeolite has occurred un...
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