What dose strontium carbonate do in a glaze?

The role of Strontium Carbonate in glaze: frit is to pre-smelt the raw material or become a glass body, which is a commonly used flux raw material for ceramic glaze. When pre-smelted into flux, most of the gas can be removed from the glaze raw material, thus reducing the generation of bubbles and small holes on the ceramic glaze surface. This is especially significant for ceramic products with high firing temperature and short firing cycle, such as daily ceramics and sanitary ceramics.

Frits are currently widely used in fast-fired fine pottery glazes. Because of its low initial melting temperature and large firing temperature range, frit has an irreplaceable role in the preparation of rapidly fired architectural ceramic products. For porcelain with higher firing temperature, the raw material is always used as the main glaze. Even if the frit is used for the glaze, the amount of the frit is very small (the amount of the frit in the glaze is less than 30%.).

A lead-free frit glaze belongs to the technical field of frit glaze for ceramics. It is made of the following raw materials by weight: 15-30% of quartz, 30-50% of feldspar, 7-15% of borax, 5-15% of boric acid, 3-6% of Barium Carbonate, 6-6% of stalactite. 12%, zinc oxide 3-6%, Strontium Carbonate 2-5%, Lithium Carbonate 2-4%, slaked talc 2-4%, Aluminum Hydroxide 2-8%. Achieving zero melting of lead can fully meet people’s needs for healthy and high-quality ceramics.