Why silicon nitride is an important structural ceramic material
What is silicon nitride?
Silicon nitride is an important architectural ceramic product with high hardness, lubricity, and wear resistance. It is an atomic crystal that resists oxidation at heats. It can likewise stand up to cold as well as hot shocks. It can be heated to even more than 1000 ℃ in air, cooled down dramatically, and afterwards warmed smartly without breaking. It is accurate since silicon nitride ceramics have such excellent features that people frequently use it to make bearings, turbine blades, mechanical seal rings, Long-term mold and mildews, and also other mechanical components. Intend silicon nitride porcelains that are immune to heats and challenging to warm transfer are utilized to make the home heating surfaces of engine parts. Because instance, it can enhance the top quality of middle extract engines as well as conserve fuel and thermal effectiveness. China, the USA, Japan, and also various other nations have actually established center extract engines.
The production approach of silicon
nitride There are 2 manufacturing techniques of silicon nitride ceramic products, specifically reaction sintering and warm pushing sintering. The response sintering method is to form silicon powder or a mixture of silicon powder as well as silicon nitride powder according to the basic production approach of ceramic products. Then, in the nitriding furnace, pre-nitriding is performed at 1150 ~ 1200 ℃. After obtaining a certain stamina, machining can be performed on the machine tool. Then, further nitriding is carried out at 1350 ~ 1450 ℃ for 18 ~ 36h up until the items end up being silicon nitride. This way, the item dimension is accurate, and also the quantity is steady. The warm pushing sintering technique is to combine silicon nitride powder with a little number of ingredients, such as MgO, Al2O3, MgF2, AlF3, or Fe2O3, Under the pressure of 19.6 MPa or above and a temperature of 1600 ~ 1700 ℃, the products made by hot pushing sintering are generally denser. They have much better properties than those made by response sintering.
Key applications of silicon nitride
Silicon nitride is used as advanced refractories, such as SI3N4-SIC refractories combined with sic for blast furnace pile, and also various other parts, such as SI3N4-BN materials integrated with BN for horizontal continual casting separation ring. The SI3N4-BN series flat constant casting separation ring is an acceptable ceramic product with an uniform structure, high mechanical strength, good warm resistance, as well as impact resistance. It will not be wetted by fluid steel, meeting the procedure demands of constant spreading. In addition, silicon nitride ceramic materials have high thermal stability, solid oxidation resistance, as well as high dimensional precision. Silicon nitride is a covalent compound with a high bond stamina and can create an oxide safety movie in the air, so it also has good chemical security. It will certainly not be oxidized listed below 1200 ℃. The safety film created at 1200 ~ 1600 ℃ can stop additional oxidation and will certainly not be saturated or worn away by molten steels or alloys such as aluminum, lead, tin, silver, brass, and nickel. Still, it can be damaged by molten solutions such as magnesium, nickel-chromium alloy, stainless steel, etc Rate of
Silicon nitride fragment size as well as pureness will influence the item'' s Cost, and also the acquisition quantity can likewise impact the price of silicon nitride. A big amount of huge amount will certainly be reduced. The Cost of silicon nitride can be located on our firm'' s main internet site.
Silicon nitride distributor
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