Title: Preparation of Wollastonite Glass-ceramics by Reactive Crystallization Sintering
Abstract: A novel route,reactive crystallization sintering,was proposed for the preparation of wollastonite glass-ceramics directly using waste glass.The crystallization promoter,synthesized by kaolin and calcium carbonate as main raw materials,was added into waste glass powder and then sintered,the wollastonite formed through a reaction between crystallization promoter and glass.Effects of the crystallization promoter content and sintering temperature on the microstructures,sintering behavior and properties of wollastonite glass-ceramics were investigated.The results showed that bulk density and open porosity of glass-ceramics increased with increasing the crystallization promoter content but strength firstly increased and then dropped.Raising temperature promoted the reactive crystallization and decreased bulk density,open porosity and strength of glass-ceramics.The best mechanical properties could be obtained for the wollastonite glass-ceramics with 15% crystallization promoter and sintered at 850 ℃.
Publication Year: 2012
Publication Date: 2012-01-01
Language: en
Type: article
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