Silicon nitride insulation ring will not react with hydrogen, hydrogen chloride, silicon chloride and other gases, good stability, can play a 

heat insulation, anti-corrosion, high temperature resistance effect, can effectively prevent the peeling carbon felt and other conductive

 materials will be connected to the electrode and chassis, resulting in short circuit phenomenon, but also can be isolated from the high 

temperature in the reduction furnace, so as to avoid the reduction furnace hydrogen leakage or explosion and other safety accidents. 

Silicon nitride ceramic ring has good insulation, high toughness, high temperature resistance and good shock resistance, which can meet 

the environmental requirements of polysilicon reduction furnace, improve work efficiency, and the service life is more than 10 times that 

of alumina insulated ring.

Advantages of silicon nitride insulation ring:

Has a strong corrosion resistance: can be used in strong oxidants, dissolved hydrochloric acid in addition to hydrochloric acid, it does not

 react with other strong oxidants;

High temperature resistance strength is very high: silicon nitride ceramics at 1200℃ temperature, the compressive strength will almost

 not change, can be applied in high temperature environment, after heat is not easy to melt into melt, if until 1900℃ high temperature will 

dissolve;

No magnetic conductivity, insulation, low heat transfer: can be used as insulation layer insulation material;

Low density, light weight, compressive strength and strength far beyond the general structural ceramics: can be used as metal 

composite materials;

Low linear expansion coefficient: equal to 30% of alumina ceramics, not 40% of zirconia ceramics, can bear a large temperature change 

in the air temperature to more than 1000 ° C, large cooling and then large heating, will not break.

Silicon nitride insulation ring performance indicators :

Ceramic product processing accuracy :

Application: photovoltaic reduction furnace field.