The raw material of the ceramics

1.Plastic raw materials(ceramics)
The mineral composition of plastic raw materials is mainly clay minerals, which are silicates with layered structure, and their particles are generally below the apparent particle size (less than 10%) μ m) And has certain plasticity. Such as kaolin, hydrated Gaoling soil, bentonite, porcelain clay, etc. Plastic raw materials mainly play the role of plasticization and combination in production. It gives the blank plasticity and grouting forming performance, and ensures the dry blank strength and various service properties after firing, such as mechanical strength, thermal stability and chemical stability. They are not only the basis for forming, but also the porcelain foundation of clay ceramics.

2.Barren raw materials(ceramics)
The mineral components of barren raw materials are mainly non plastic silicon, aluminum oxides and oxygen-containing salts. Such as quartz, opal, pyrophyllite, clinker after clay calcination, waste porcelain powder, etc. Barren raw materials play a role in reducing viscosity in production, which can reduce the viscosity of the blank. After firing, some quartz is dissolved in feldspar glass to improve the liquid phase viscosity and prevent high-temperature deformation. After cooling, it plays a skeleton role in the porcelain blank.

3. Flux raw materials(ceramics)
The mineral composition of flux raw materials is mainly alkali metal, alkaline earth metal oxide and oxygen-containing salt. Such as feldspar, limestone, dolomite, talc, lepidolite, granite, etc. They play the role of melting aid in production. After high-temperature melting, they can dissolve part of quartz and Gaoling soil decomposition products, and the fused high viscosity glass can play the role of high-temperature cementation. It also plays a role in reducing viscosity at room temperature.

4. Functional raw materials(ceramics)
In addition to the above three categories of raw materials, other raw materials and auxiliary raw materials are collectively referred to as functional raw materials. Such as zinc oxide, zircon, pigment, electrolyte, etc. They do not play a major role in production, nor are they necessary components for porcelain. Generally, a small amount of addition can significantly improve the performance of some aspects of the products. Sometimes, it is to improve the process performance of green glaze without affecting the performance of the products, which is conducive to the realization of the production process.