Sintering method of SiC ceramic products

A comprehensive overview of silicon carbide products
What is silicon carbide product? How to use silicon carbide products, we first need to define silicon carbide, and then know the components of silicon carbide products, which processes to use? Here’s a brief introduction
Silicon carbide is a kind of inorganic non-metallic material. Because of its high hardness, high wear resistance, high corrosion resistance and high temperature strength, it is used in various mechanical parts that require wear resistance, corrosion resistance and high temperature resistance. Due to the continuous efforts of material workers, its performance has been greatly improved, and it has become an important engineering material, widely used in mechanical, metallurgical, chemical, electronic and other departments.
The production of SiC ceramic products by sintering under normal pressure is characterized by high sintering temperature, high density and over 98% SiC content. The obtained SiC ceramic sinter has high corrosion resistance, oxidation resistance and high temperature strength. The strength does not decrease at 1600oc. Therefore, the products are especially suitable for wear-resistant, corrosion-resistant and high temperature resistant occasions, such as sealing ring, grinding medium, sandblasting nozzle, bulletproof plate, etc.

What are the main applications of special ceramics?
Special ceramics include ceramic products made of various materials, such as silicon carbide products made of silicon carbide materials, silicon carbide sealing rings, 99 ceramics made of alumina materials, electrolytes made of zirconia materials, etc. So it’s widely used. Today I’ll explain the special ceramics applied to high-end products.
Special ceramics made of zirconia
Zirconia ceramics have become the most widely used electrolyte materials because of its high ionic conductivity, good chemical stability and structural stability. Through the improvement of the preparation process of zirconia based electrolyte film, the operating temperature and preparation cost of this kind of material can be reduced, and the industrialization can be realized.
2. Special ceramics made of silicon carbide
Silicon carbide material is a kind of material with high hardness and low cost. It can produce silicon carbide products, such as silicon carbide seal, silicon carbide shaft sleeve, silicon carbide bullet proof plate, silicon carbide special-shaped parts, etc., which can be applied to mechanical seals and various pumps.
In the future development, special ceramics will be more widely used, because of the continuous emergence of new materials, the function of special ceramics is more and more popular!

What silicon carbide products are on the market today
In the silicon carbide products industry, just because of its large market, there are many kinds of silicon carbide products, such as silicon carbide seal ring, silicon carbide shaft sleeve, silicon carbide shaft, silicon carbide bullet proof plate, etc.
1. Silicon carbide sealing ring
The silicon carbide seal ring is mainly used in mechanical seal. The dynamic and static rings are used together with fixed accessories to form the mechanical seal. It is the core part of the seal and plays a key role.
2. Silicon carbide shaft sleeve and shaft
Silicon carbide shaft sleeve and shaft can be used on magnetic pump and autoclave. They are matched with each other. The shaft plays a supporting role. The shaft sleeve is sealed on the shaft to jointly ensure the normal sealing of magnetic pump under high temperature.
3. Silicon carbide bullet proof plate
Silicon carbide bulletproof plate is a new product, which is very popular in foreign countries. Silicon carbide bulletproof plate has high hardness, small proportion and good ballistic performance, which is widely used in all kinds of bulletproof vehicles, armored vehicles, warships and other bulletproof devices
With the growing market of silicon carbide products, the requirements of customers are higher and higher, so there are more and more kinds of silicon carbide products.

Difference between pressureless sintering and reactive sintering
Pressureless sintering and reactive sintering are two kinds of sintering processes of silicon carbide products. Because of the different firing processes, the properties of the products are also different, which are mainly focused on the technical parameters of pressureless sintering silicon carbide and reactive sintering silicon carbide.
1 different firing process
Reactive sintering is the infiltration of free silicon into silicon carbide at a lower temperature. However, pressureless sintering is a kind of silicon carbide product which shrinks naturally at 2100 ℃.
2. Different technical parameters of sintering products
The volume density, hardness and compressive strength of the reaction are different from the technical parameters of pressureless silicon carbide products.
3 different product performance
Reaction sintering products and non pressure products in different pH, temperature and other conditions, the use of time is different.