There are many kinds of ceramic forming methods. In production, the forming method should be selected according to the shape of the product, and different forming methods need to choose different binders. Binders can be divided into lubricants, plasticizers, dispersants, surfactants (with dispersant and lubrication functions), etc. in order to meet the needs of forming, a combination of a variety of organic materials is usually used.

Advantages of alumina ceramic nozzle:

1. High hardness, good erosion resistance and long service life.

2. Nozzles of the same specification are lighter and more elastic.

3. The surface of the material is smooth without pores, the internal flow channel is smoother, it is not easy to scale, and the atomization is more uniform.

4. The heat transfer is better, and the nozzle is not easy to crack and deform due to the alternation of cold and heat.

5. In addition, reaction sintered silicon carbide can be used as full-size spiral nozzle and tangential hollow cone nozzle. In case of water, it will be highly corrosive, so the nozzle of general metal materials can not meet the process requirements.

Performance index of alumina ceramic nozzle:

AL2O3（%） 95

Bulk density (g / cm3) 3.6

Flexural strength (MPA) 304

Mo porcelain hardness 8.5

Coefficient of linear expansion（ × 10-6℃）（25-800℃） 7．5

Thermal conductivity (w / M.R) 20

Insulation strength (kV / mm) 10

Volume resistivity (Ω. Cm): 20 ℃ > 1014 300 ℃ > 1012

Long term operating temperature (℃) 1480

Fire resistance (℃) 2000