Abstract
The article presents the results of studies aimed at establishing the possibility of obtaining low-melting nephritized glazes for majolica with a glass transition temperature of not more than 1000 ° C in the system of materials "quartz sand - ulexite - soda - feldspar concentrate". A rational choice of raw materials will ensure the production of slips that are able to maintain their design chemical composition during the application of majolica to the shard, therefore, provide the specified chemical composition of the glaze and contribute to obtaining the required physical, mechanical and chemical properties of the glaze layer. The design of the material compositions of the charges and the chemical compositions of the glaze coatings was carried out using the mathematical planning of the experiment, which significantly reduced the time and material costs for research. The parameters that determine the quality of slips and glaze coatings have been established, their most optimal values have been identified, which ensure the production of acceptable glaze coatings, and the ways to optimize work in the studied direction have been determined. As a result, the fundamental possibility of obtaining low-melting nephritized glazes in the system of materials "quartz sand - ulexite - soda - feldspar concentrate, capable of transforming into a glassy state at temperatures not exceeding 1000 ºC, has been proved.
Highlights
The article presents the results of studies aimed at establishing the possibility of obtaining lowmelting not fritted glazes for majolica with a glass transition temperature of not more than 1000 °C in the system of materials "quartz sand – ulexite – soda – feldspar concentrate"
A rational choice of raw materials will ensure the production of slips that are able to maintain their design chemical composition during the application of majolica to the shard
The design of the material compositions of the charges and the chemical compositions of the glaze coatings is carried out using the mathematical planning of the experiment, which significantly reduces the time and material costs for research
Summary
В статье приведены результаты исследований, направленные на установление возможности получения легкоплавких нефриттованных глазурей для майолики с температурой стеклования не более 1000 oС в системе материалов «кварцевый песок – улексит – сода – полевошпатовый концентрат». В результате доказана принципиальная возможность получения легкоплавких нефриттованных глазурей в системе материалов «кварцевый песок – улексит – сода – полевошпатовый концентрат», способных переходить в стеклообразное состояние при температурах не более 1000 oС. На стадии нанесения на черепок, темперащем в своем составе не только оксид бора, но и тура шликера не превышает 20 oС, поэтому расоксид натрия, которые являются «плавнями» и творимость улексита резко снижается, что также снижают температуру варки стекла; в рассматри- определяет его бóльшую успешность применеваемом случае – температуру стеклования шли- ния для получения нефриттованных глазурей в кера нефриттованной глазури. Рациональность выбора улексита можно ворить о миграции раствора в черепок
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