Alumina electronic ceramic board is a special process board in which copper foil is directly bonded to the surface (single side or double side) of alumina (Al2O3) ceramic substrate at high temperature. The produced ultra-thin composite substrate has excellent electrical insulation performance, high thermal conductivity, excellent solderability and high adhesion strength, and can etch various patterns like a PCB board, and has a large current-carrying capacity. ability. Therefore, ceramic circuit boards like Sliton have become the basic materials for high-power power electronic circuit structure technology and interconnection technology. It has a wide range of applications and is used in high-power equipment, IC MOS tubes, IGBT chip-type heat-conducting insulation, high-frequency power supplies, communications, mechanical equipment, high-current, high-voltage, high-temperature and other product components that require heat conduction and heat dissipation insulation. Alumina ceramics have excellent dielectric strength, high-frequency loss is relatively small but high-frequency dielectric strength is good, followed by alumina ceramic raw materials with temperature resistance, small linear expansion coefficient, high impact toughness and heat conduction In addition, alumina ceramics have the characteristics of chemical corrosion resistance and molten metal resistance, but it is not known that alumina ceramics are flame-retardant, and stainless steel is strong and not easy to be destroyed, which have good characteristics that other materials and metal composite materials cannot compare. 
Characteristics of alumina ceramic plate
 1. High hardness.
As determined by the Shanghai Institute of Ceramics, Chinese Academy of Sciences, the Rockwell hardness of alumina ceramic plate is HRA80-90. The hardness is second only to diamond, far exceeding the wear resistance of wear-resistant steel and stainless steel. . 
2. Excellent wear resistance
According to the measurement by the Powder Metallurgy Institute of Central South University, the wear resistance of alumina ceramic plate is 266 times that of manganese steel and 171.5 times that of high chromium cast iron. According to our customer follow-up survey over the past ten years, under the same working conditions, the service life of the equipment can be extended by more than ten times. 
3. Light in weight.
Its density is 3.5g/cm3. It is only half of that of steel, which can greatly reduce the load on equipment. 
4. High melting point
Alumina has a very high melting point, high hardness and high mechanical strength, although the temperature of the mechanical strength drops to more than 1000°C. Due to the increase in the relatively large coefficient of thermal expansion, the thermal shock stability decreases. 
5. Insulation and acid resistance
Alumina is an electrical insulating material with high resistivity, and it also has good chemical stability, so it has good corrosion resistance. Aluminum oxide is insoluble in water, only slightly soluble in strong acid and alkaline aqueous solution.