Inorganic and organic nano-hybrid composite high temperature resistant ceramic coatings: organic compounds are used as matrix resins, and inorganic compounds are added. The obtained paint film is changed from an organic type to an inorganic type at a high temperature, so that the properties of the inorganic and organic substances are complementary, the advantages are avoided, and the substrate is protected. For example, a silicone resin is used as a base material, which is mixed with a high-temperature-resistant pigment, a metal oxide and a nitrate filler, and a solvent. High temperature protection. The coating is capable of a high temperature of 900 to 1200 ° C, and the process is simple, and has the characteristics of high temperature crack resistance and recyclability.

Inorganic nano high temperature resistant ceramic coating: It is made of water-dispersed nano-grade alumina, pigment, filler, potassium titanate whisker, methyloxysilane and other materials. The obtained coating is dense, high in hardness, excellent in flame resistance and high temperature resistance, and does not easily decompose harmful substances under high temperature, and can be widely used in various fields. Can replace "Teflon". A ceramic coating suitable for a heating furnace can also be prepared by using ceramic fine powder, an inorganic binder, and a linear expansion coefficient adjuster. The coating has effective emissivity and thermal shock resistance, saves energy, and can extend the life of the furnace lining furnace tube.

The abrasion resistance of wear-resistant ceramic coatings is an ideal material for vertical mills, roller presses, powder separators, powder pipeline valves and linings of powder conveying pipelines. In various powder production lines (especially non-metallic mineral powder production lines), there are many equipments and pipelines that have been washed by materials or high-concentration dust-containing gases for a long time. For example, mill outlet air duct, powder separator, ball mill chute, lower hopper, various valve inner chambers, shutters and conveying pipes, etc.

设计 In the design and production of wear-resistant ceramic materials, currently, the selection of raw materials and design processing technology are mainly based on several technical directions briefly described below:

1. Coatings should form microcrystalline and high-density microstructures. In order to eliminate defects and improve the integrity of crystals, fineness, denseness, uniformity, and purity are an important direction for the development of current ceramics. In recent years, many microcrystalline, high-density, high-purity ceramic materials have appeared, such as hot-pressed silicon nitride ceramics. , The density is close to the theoretical value, almost does not contain pores, mechanical strength and wear resistance, which are incomparable with traditional ceramics. In particular, various fibers and whiskers that have appeared in recent years have a complete crystal structure, almost no defects, and the strength can be increased by an order of magnitude.

2. The paint should choose raw materials with high elastic modulus to improve the hardness and wear resistance of the material. The modulus of elasticity E is an important material constant, a sign of the bonding strength between atoms, and is actually the slope of the curve at any point on the bonding curve between atoms. Covalently bonded and ionic bonded crystals usually have a high elastic modulus due to their strong binding force. Therefore, if you want to obtain high-strength wear-resistant materials, you should choose ions and covalent compounds, such as oxides, nitrides, carbides and borides. For example: Corundum, silicon carbide, titanium carbide, titanium boride and zirconium boride powder materials are widely used in wear-resistant ceramic coatings.

3. Use fine particles to enhance the mechanical strength of the lining. After the particles are added, the elastic modulus and shear modulus of the material are increased, and the strength and wear resistance of the material are significantly improved, which can increase the service life of the wear-resistant material and reduce production costs.

When high-strength particles are added to the ceramic material, the material's resistance to stress-induced crack expansion will be significantly suppressed. When cracks propagate to the particles under the effect of stress, the cracks are “pinned” due to the strength of the particles and a small expansion coefficient. To continue the expansion requires more energy to penetrate the particles or crack deflection occurs, increasing the interface area. , Thereby increasing energy consumption and improving the strength and toughness of the material.