Zirconia (ZrO2) / advanced fine ceramic material
Extremely high toughness 6-8MPam1 / 2, high thermal expansion performance (α = 10 x 10-6 / K, close to steel), excellent thermal insulation / low thermal conductivity (3 W / mK), maximum use temperature 1000 ℃
In the family of fine ceramic materials, zirconia (ZrO2) has a high melting point, oxidation resistance and high temperature resistance, has an extremely high use temperature, and is a ceramic material with excellent toughness,
so it is often used in high temperature resistant parts and mechanical wear parts , Structural parts combined with other steels.
The excellent combination is characterized by low heat, high bending strength and low thermal conductivity, and stable high temperature performance, stable thermal shock performance and excellent chemical stability. Therefore, it is also often used in precision equipment, medical equipment, chemical industry and other fields
Industrial wear parts, mechanical parts; mold structural parts; fuel cells; communication parts (ferrules, bushings); mechanical plungers (spools, valve sleeves, filling pumps); automotive industry (sensors); mobile phone parts (fingerprints) Identification, middle frame, back cover); smart wear (watches, decorations); sealing parts (seal rings, seal sleeves, sealed bearings); ceramic bearings, ceramic balls
Alumina (Al2O3) / oxide ceramic material
Very high hardness HRA90 ～ 93, excellent electrical insulation (1x10 ^ -14 to 1x10 ^ 15 Ωcm), medium to ultra-high mechanical strength (360 to 600 MPa), extremely high compressive strength (2250 to 2700 MPa), low thermal conductivity (25 to 32 W / mK), the maximum operating temperature is 1400 ° C.
Alumina (Al2O3) has high hardness, good wear resistance, corrosion resistance and high temperature resistance,
so it is used in various industries such as machinery, molds, textiles, petroleum, chemicals, refractory materials and electronics. It is currently an oxide ceramic Among the most versatile, wear-resistant and high-temperature resistant ceramic materials with the largest production and sales.
The main alumina ceramic grades in Xiayang, Guangdong are: A-100, A-200, AZ-100.
Electronic industry (circuit board, tube seat, housing); machinery industry (bearing), ceramic nails, ceramic seals, ceramic ball valves, cutting tools, ceramic plungers, refractory bricks, refractory plates, ball mill lining plates, ceramic gauge blocks
Silicon nitride (Si3N4) / ceramic material with excellent comprehensive performance
Very high hardness (92.5HRA); excellent fracture toughness (6 ～ 7.0MPam1 / 2); good bending strength (850 MPa); very low density (3.20 g / cm3), very low coefficient of thermal expansion (3.2x10-6 / K ), Maximum working temperature: 1400 ° C
Silicon nitride (Si3N4) has an excellent combination of material properties. The density is low, but it is extremely hard, and due to its special crystal structure, it is endowed with excellent thermal stability and high fracture toughness. Become a better choice for use under extreme conditions. Therefore, silicon nitride ceramics are the only choice for high-speed and high-precision bearings. They are also important materials for high-temperature forming, high-speed cutting tools, and high-temperature wear-resistant parts.
Machinery industry: (motor bearings, high-temperature main shafts, turbine blades, mechanical seal rings);Metallurgical industry: (welding roller, water blocking ring, crucible, burner);Chemical industry: (ball valve, pump body, burner, carburetor and other corrosion-resistant and wear-resistant parts)Aerospace industry: (high-temperature insulators, radomes, engines);
Metal processing: (metal forming, rolling elements, cutting tools, industrial nozzles);Auto parts: (turbine rotor, cam tappet)
Silicon Carbide (SiC) / super hard ceramic material
Very low density (3.20 g / cm3); very high hardness: (94HRA); high thermal conductivity (80 W / mK); low linear expansion coefficient (4.5x10-6 / K, 400 ° C); maximum operating temperature: 1500 ° C; good corrosion resistance and wear resistance at high temperature;
Silicon carbide is one of the hardest materials in the fine ceramic family, with a hardness close to that of diamond. Not only is it the lightest weight, it has excellent thermal conductivity, high temperature chemical stability, low thermal expansion, and extremely acid and alkali resistance.
Therefore, silicon carbide is an excellent kiln furniture material, furnace material, high temperature damage resistant parts. Silicon carbide's excellent resistance to corrosion, wear and erosion is as good as its ability to withstand friction and wear.Typical applications of silicon carbide components are dynamic seal technology and mechanical seals using friction bearings.
Petroleum: (valves, nozzles); Chemicals: (seals);Aerospace: (Gas turbine blades, turbocharger rotor); Microelectronics, automotive, papermaking, laser, mining and atomic energy;
Magnesia-Partially Stabilised Zirconia (Mg-PSZ) with exceptional
transformation toughening properties：
Comprising 3.5 wt% MgO in ZrO2·Designed for applications requiring high thermal shock resistance
Very high mechanical strength·Excellent wear and abrasion resistance·Excellent corrosion resistance·High impact resistance and toughness·Superior thermal shock resistance·Very low thermal conductivity
Excellent for combating wear and corrosion in applications requiring thermal shock resistance·Successfully used for a wide variety of tooling used in metal forming,such as, dies for hot copper and brass extrusion, guide rollers for welded tube production and for zinc coating steel sheet
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