article·1998-01-01

Study on Phase Diagram of Bi_2O_3-SiO_2 System

Fei Yi

Abstract

Stable and metastable phase equilibria in a binary Bi2O3-SiO2 system were studied and acomplete phase diagram of the system was proposed with DTA and XRD. A peritectic reaction L+Sio2 Bi4Si3O12 at the SiO2-rich side of stable phase diagram was identified to have peritectictemperature at about 1030℃ and peritectic point close to the end of the peritectic isotherm.Bi4Si3O12 was observed to be a nearly congruently melting compound and liquidus of the peritecticreaction was identified by quenching microstructure method. Crystallization behavior of Bi2O3Sio2 system was also investigated. The results show that metastable Bi2SiO5 crystallizes out at845℃.
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Research context

OpenAlex topics: Metallurgical Processes and Thermodynamics

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