The principle of CMC working with pinholes In ceramic glaze

2020-03-21 13:20


Ceramic glaze withsodium meldonium cellulose (CMC) for white or pale yellow powder, granular orfibrous solid, tasteless, non-toxic, water soluble. CMC was selected as anelectrolyte in the production of sanitary ceramics because of its goodadhesion, suspension, solution aggregation and water retention effect, can bewidely used in ceramic glaze applications.

In the actualceramic glaze production process (wall tiles, tiles, etc.), often appear glazedpinholes, similar to needle-like small holes, called pinholes. There are manyreasons for this, such as the melting block did not melt enough, the glazestart melting temperature and high temperature temperature difference is toolarge, when the glaze body temperature is too high, resulting in the blank bodytoo dry, so that the glaze penetrates the blank body too fast and so on.

Commonly usedsolutions have many, such as appropriate lying temperature, reduce hightemperature viscosity, improve the quality of melting blocks, appropriatelyreduce the burning temperature or improve the mature temperature range of theglaze, but the best way is to improve water retention, prevent dry watershortage, which requires increasing water retention better raw materials.

Sodium methylenecellulose CMC is a good water-preserving raw material, can provide goodadhesion.