What are the characteristics and advantages of alumina ceramic crucibles from porcelain crucible manufacturers?

Porcelain crucible manufacturer Features of alumina ceramic crucibles: They can withstand temperatures of around 1200 degrees, suitable for melting samples of acidic substances such as K2S2O7. Generally, alkaline substances such as NaOH, Na2O2, and Na2CO3 cannot be used as fluxes for melting, to avoid corrosion of the porcelain crucible. Porcelain crucibles must not come into contact with hydrofluoric acid.

Porcelain crucible manufacturer Alumina ceramic crucibles are generally usable They can be cleaned with dilute hydrochloric acid and boiling water to ensure material purity and high-temperature resistance. This material has high density, good oxidation resistance, 400-500 degrees higher than graphite, up to 900 degrees, and a long service life. It has high heat resistance, a low coefficient of thermal expansion, good thermal shock resistance, and corrosion resistance. It has stable chemical properties, basically does not react with molten metals, and improves the purity of the alloy.

Porcelain crucible manufacturer Advantages of alumina ceramic crucibles:

(1) Easy to clean and maintain. The ceramic crucible has a bright and smooth glaze, and is easy to clean after coloring.

(2) Porcelain has few pores and low water absorption. Solutions stored in ceramic crucibles are tightly sealed to prevent external bacteria from volatilizing, permeating, and invading.

(3) Chemical stability and durability. This is superior to metal products such as copper, iron, and aluminum. Ceramic crucibles have a certain ability to resist corrosion by acids, alkalis, salts, and carbon dioxide in the atmosphere. They are not easily reactive with these substances, and do not rust or age.

(4) Good thermal stability and slow heat transfer rate. Ceramic crucibles are superior to glassware because they are not easily cracked when rapidly heated and suddenly cooled under a certain temperature difference. It is a poor conductor of heat and transfers heat slowly. When used to hold boiling water or hot solutions, it does not get too hot.

Porcelain crucible manufacturer Aluminum nitride ceramic crucibles have good thermal conductivity and are also a good insulator. It can automatically separate from some molten metals. That is to say, it is more difficult to process, resulting in high processing costs and higher product prices, which makes aluminum nitride ceramics difficult to process, mainly due to the high hardness and brittleness of this material. We use special ceramic CNC milling machines to process aluminum nitride ceramic crucibles, with high automation, high processing efficiency, and significant advantages in processing precision and yield.

The processing methods of aluminum nitride ceramic crucibles mainly include grinding machines and ceramic CNC precision engraving. First, a plane grinder is used to process the shape of the zirconia blank. This process can process the complete shape and grooves. After grinding by the grinding machine, the zirconia ceramic crucible now has high-precision shape dimensions. After completing this process, it will be transferred to a ceramic CNC machine for back-end processing. CNC is mainly used to process holes on ceramic crucibles. Here, the problem of ceramic hole edge collapse should be controlled. If not careful, the edges will collapse, but it is difficult to recover the collapsed edges.

At this time, the method of drilling first and then reaming can be adopted. Similarly, we can first retain more crucible thickness, and then polish the damaged side on the grinding machine after processing the hole. At this time, we can achieve the effect of removing the damaged edge. Zirconia ceramic crucibles are characterized by high temperature resistance, corrosion resistance, wear resistance, high precision, and high strength. It is widely used in various fields.