What is the role of potash feldspar in ceramic raw materials?

What is the role of potash feldspar in ceramic raw materials?

Potash feldspar plays an important role in the ceramic raw material blank and glaze.

The role of potassium feldspar in ceramic glaze:

1. The glassy substance formed by the high temperature melting of raw materials such as potassium albite and quartz is the main component of the stable layer

2. Low melting point, easy to vitrification, melting at 1100 degrees Celsius, feldspar glass grown at high temperature can dissolve raw materials such as clay and quartz

3. Can make the glaze have a higher gloss, transparent and bright

4. Wide melting range, high melt viscosity

5. Reduce the expansion coefficient and high temperature fluidity of the glaze

6. Good corrosion resistance

The role of potassium feldspar in porcelain embryo:

1. Potassium feldspar and quartz are both crumb raw materials, which can increase the drying rate in the embryo and reduce drying shrinkage and deformation.

2. Feldspar as a solvent substance can lower the firing temperature of ceramic products

3. When feldspar is heated to above 1100 degrees Celsius to melt, it will produce glass too. It has the ability to dissolve other substances. It can promote the mutual diffusion and mutual penetration of kaolin and other china clay particles, thus accelerating the formation and development of embryonic mullite crystal

4. After the feldspar is melted into a glassy state, the porosity between the filling and each crystal particle is significantly reduced, the void is reduced, the embryo body is dense, and the mechanical strength and electrical performance of the product can be improved.