Low-temperature roasted wollastonite in designingeasily meltable glazes of an increased hardness
DOI:
https://doi.org/10.15587/1729-4061.2015.43446Keywords:
wollastonite, calcium hydrocilicates, tobermorite, glaze coatings/surfaces, melting property, microhardnessAbstract
The study explores the impact of wollastonite, synthesized by a two-stage technology of autoclave calcium hydrosilicate and its low-temperature roasting to silicate, on the process of melting ceramic glaze coatings, as well as on their surface properties, including microhardness.
The research findings reveal the temperature points for softening, melting and spreading of wollastonite-based glaze coatings within the temperature range of 840-1100°С. We have studied how heated glaze melting processes depend on the amount of synthetic wollastonite and how the dynamics of diameter change in the cylindered samples due to the content of calcium silicate and the temperature of roasting.
The research shows that the added synthetic low-temperature wollastonite increases the microhardness of the glazed surface samples, which is important for production of facing materials that are vulnerable to abrasion. The findings show that the optimal content of synthetic wollastonite is 20-30%, and the optimal roasting temperature for wollastonite-based glazes is 1050°C.
The research has proved that synthetic wollastonite increases the microhardness of glazed surfaces more than the natural mineral equivalent.References
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Copyright (c) 2015 Олеся Василівна Шулипа, Ярослав Іванович Вахула, Зенон Іванович Боровець, Мирон Григорович Пона, Іван Володимирович Солоха
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