Corrosion-resistant
High temperature resistance
Non-magnetic, electrically insulated
Low thermal conductivity
Low coefficient of thermal expansion
Silicon nitride structural parts are structural parts made of silicon nitride ceramic materials. Silicon nitride ceramics are a very important material with excellent physical and chemical properties, so they are widely used in electronics, optoelectronics, ceramics and other fields.
Product Specifications：Metallurgical Industry
Performance paarameters of special silicon nitride ceramics for casting | |||
Project | NumencValue | Unit | Remarks |
Bulk density | 3.2 | Mg/m³ | |
compressive strength | 3000 | Mpa | |
Flexural Strength | 700 | Mpa | |
Vickers hardness | 1400 | kgf/m㎡ | |
Fracture Toughness | 8 | MPa･m½ | |
Coefficient of Linear Expansion | 3.3 | ×10-⁶/K | Room Temperature 1000~C |
Thermal Conductivity | 24~42 | W(m.K) | Average Temperature 40℃ |
Maximum operating temperature in air | 1200 | ℃ | |
Maximum operating temperature inprotectie atmospher | 1400 | ℃ | |
Corrosion Resistance | Corrosion Resistance and non-infiltration of molten metals such as aluminium,copper,magnesium,zinc,lead,gallium,germanium,indium, gold, silver, cadmium,tin,bismuth,etc. | ||
Features：
-It is corrosion resistant, can be used in strong acids and alkalis, and is soluble in hydrofluoric acid. It does not react with other inorganic acids except hydrofluoric acid.
-High temperature resistant: at 1200℃, the strength and hardness of silicon nitride ceramics remain almost unchanged. It will not melt into a melt when heated and will not decompose until 1900℃.
-It is non-magnetic, electrically insulating, and has low thermal conductivity, and can be used as insulating and heat-insulating materials.
-The thermal expansion coefficient is low and it can withstand rapid temperature changes. It will not break even if it is heated to over 1 000 ℃ in the air, cooled rapidly and then heated rapidly.
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