YDTech™ suppliers of structural ceramics ZrO2+MgO valves, Si3N4 balls, Al2O3 washers, AlN plates, ZrO2+Y2O3,SiC films! manufacturers of zirconium oxide ZrO2+Y2O3 valves, 440C beads, SS420 balls, substrates, pipes, washers in china.
we supply many kinds of ceramic parts according to the customers' differents requirements. our products include the ceramic disc valve, ceramic plunger, ceramic rod, ceramic shaft, ceramic piston, ceramic water valve sheet, ceramic pipe sleeve, ceramic loom plunger, ceramic seal ring, special shape ceramic, zro2 zirconia ceramic roller ,al2o3 alumina ceramic roller ,ceramic knife etc.
we are specializing in designing and supplying zirconia ceramic ,such as zirconia ceramic according to your requirement, we encourage you to discuss your project with us early to avoid difficult problems later. we will specify benefits of each material and discuss various processing techniques which is suitable for your product.
you tell us your requirement, we design and supply the best product for you. your any comments is the most support for us. the improvement will never end. welcome to your enquiry including requirement!
ceramic materials, which can be used in making bearings, include mainly silicon nitride(si3n4), zirconia(zro2), alumina(al2o3)and so on. si3n4 is in speaking form,which bearing steel also had,but zro2,al2o3 fail in a crush form,a catastrophic failure. !note:non-standard ceramic ball orders to specifications arranged by customers are also welcomed.
the constant quality control during manufacturing is the guarantee for the good quality and for the satisfaction of our customer. meeting the specifications and drawings of our customers are the basis of our quality control. we use many ways and equipment to inspect for products. also we control every step for producing. we will store the quality data for traceability purposes. welcome to receive your enquiry including requirements and comments!
thermal properties for precision ceramics Si3N4 silicon nitride balls,valves
| Maximum Use Temperature | ℃ | 1200 | |||||||
| Thermal Conductivity | W/(m·K) | 15-20 | |||||||
| Thermal Expansion Coefficient | 10-6 ℃ | >3.1 | |||||||
| Thermal Shock Resistance | △T ℃ | 500 | |||||||
| Specific Heat Capacity | KJ/kg. | 700 | |||||||
| ceramic Si3N4 ZrO2 Al2O3 cylindrical needles, rollers, bearings, dowels, pins, balls,valves, sticks, rods, ceramic Si3N4 ZrO2 Al2O3, substrates, rings, plates, tubes, blocks,threads, structural parts, fasteners, silicon nitride ceramic Si3N4 ZrO2 Al2O3 slots, blades, teethes, flanges, crucibles, plungers, nozzles, impellers, shafts, seals, laser cutting. | |||||||||
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the products of ceramic balls and ceramic bearings have been successfully applied in aviation and aerospace spheres,contributing to a lot for national defense. to date ceramic balls of various specification in a wide rang of sizes,which are made have been assembled in precision,high speed main shaft,dental drill,instrument bearing,computer hard disk driver and anti-magnetic,anti-corrosion,high-temperature applications. non-standard bearing orders to specifications arranged by customers are also welcomed.
thermal properties for precision ceramics ZrO2 zirconia balls,valves
| ZrO2 zirconia ceramics | unit | ZrO2-Y2O3 | ZrO2-Y2O3 | ZrO2-Y2O3 | ZrO2-MgO | ||||
| percentage | ... | 94.4% | 94% | 94% | 94.4% | ||||
| Coefficient of thermal expansion | 10-6K-1 | 9.6 | 9.5 | 10 | 10 | ||||
| Thermal conductivity | W/mk | 2.5 | 3 | 3 | 3 | ||||
| Thermal shock stability | △T.℃ | 250 | 300 | 300 | 450 | ||||
| Specific heat capacity | J/g·k | 0.46 | 0.48 | 0.46 | ... | ||||
| Maximum temperature | ℃ | 800 | 800 | 800 | 2100 | ||||
| ceramic Si3N4 ZrO2 Al2O3 cylindrical needles, rollers, bearings, dowels, pins, balls,valves, sticks, rods, ceramic Si3N4 ZrO2 Al2O3, substrates, rings, plates, tubes, blocks,threads, structural parts, fasteners, silicon nitride ceramic Si3N4 ZrO2 Al2O3 slots, blades, teethes, flanges, crucibles, plungers, nozzles, impellers, shafts, seals, laser cutting. | |||||||||
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our ceramic ball bearings are manufactured from Si3N4 Silicone Nitride when a high heat resistance and low friction are needed. The lightweight of this hard ceramic reduces skidding and wear under acceleration and high speeds. Silicon nitride balls are also extremely resistant to chemicals and other corrosive elements, and their moderate rate of thermal conductivity plus low coefficient of thermal expansion reduces cooling costs.
silicon nitride has excellent mechanical properties for use in Hybrid Bearings such as lower thermal expansion, high rigidity, and wear resistance. silicon nitride balls are used in full ceramic and hybrid-ceramic bearings in applications where ultra high-speed rotation is required. The density of silicon nitride is less than half that of steel, reducing the centrifugal force during bearing rotation which enables faster operating speeds.
silicon nitride balls have an insulating property which is highly effective in preventing electrolytic corrosion. This makes Silicon Nitride balls the optimal solution as a countermeasure against premature bearing failure in electric motors.
The non-magnetic property of silicon nitride is ideal for use in applications subjected to a magnetic field. Using steel balls in these applications may disturb the magnetic field or effect the rotating torque. Silicon nitride balls bearings are ideally used in semiconductor manufacturing equipment and medical diagnostic equipment where magnetic fields are present.