YDTech™ suppliers of silicon nitride Si3N4 ceramic cylindrical rollers, ZrO2 rods, 440C balls, valves, bearings, needles, balls, valves! manufacturers of zirconia ZrO2 ceramic rollers,Al2O3 rods, alumina cores, for fixed resistors, balls, valves, bearings in china.
silicon nitride Si3N4 ceramic bearing rollers are a type of rolling element used in various high-performance bearings. They are made from silicon nitride, a ceramic material known for its exceptional mechanical properties, resistance to wear, corrosion, and thermal shock. our company is committed to producing various high-performance ceramic components, including zirconia ceramics, silicon nitride, aluminum nitride and other products. These ceramic components have excellent thermal stability, electrical insulation, high temperature stability, and wear resistance.
bearing rollers made of silicon nitride (Si3N4) ceramics, also known as high-strength wear-resistant ceramic bearing cylinders. These bearing rollers are commonly used in high-precision and high-performance bearing systems, such as in aerospace, automotive, electronic equipment, and industrial machinery. Rollers made of silicon nitride ceramics can significantly improve the durability and performance of bearings, reduce maintenance requirements, and extend the service life of equipment.
silicon nitride ceramic bearing rollers, also known as high-strength wear-resistant ceramic bearing cylinders, showcase the excellent properties of silicon nitride as a high-performance material, suitable for application scenarios that require extreme durability and performance. silicon nitride ceramic rollers have excellent hardness, outperform traditional all-steel rollers. This property enables them to withstand high contact pressures and resist deformation, resulting in improved durability and extended bearing life.
sizes of silicon nitride (Si3N4) ceramics cylindrical rollers elements
| 3x3 | 3x5 | 3.5x5 | 4x4 | 4x6 | 4x8 | 4.5x4.5 | 4.5x6 | ||
| 5x5 | 5x8 | 5x10 | 5.5x5.5 | 5.5x8 | 6x6 | 6x8 | 6x10 | ||
| 6x12 | 6.5x6.5 | 6.5x9 | 7x7 | 7x10 | 7x14 | 7.5x7.5 | 7.5x9 | ||
| 7.5x11 | 8x8 | 8x10 | 8x12 | 9x9 | 9x10 | 9x14 | 10x10 | ||
| 10x11 | 10x14 | 11x11 | 11x12 | 11x15 | 12x12 | 12x14 | 12x18 | ||
| 13x13 | 13x20 | 14x14 | 14x20 | 15x15 | 15x16 | 15x22 | 16x16 | ||
| 16x17 | 16x24 | 17x17 | 17x24 | 18x18 | 18x19 | 18x26 | 19x19 | ||
| 19x20 | 19x28 | 20x20 | 20x30 | 21x21 | 21x30 | 22x22 | 22x24 | ||
| 22x34 | 23x23 | 24x24 | 24x26 | 24x36 | 25x25 | 25x36 | 26x26 | ||
| 26x28 | 26x40 | 28x28 | 28x44 | 30x30 | 30x48 | 32x32 | 32x52 | ||
| 34x34 | 34x55 | 36x36 | 36x58 | 38x38 | 38x62 | 40x40 | 40x65 | ||
| precision cylindrical rollers for bearings, roller bearings parts, cylindrical rolling elements | |||||||||
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silicon nitride ceramic rollers can withstand a maximum operating temperature of up to 1200 ℃, making them suitable for high-temperature environments. At the same time, their chemical stability ensures their service life in corrosive environments. ceramic rollers exhibit lower friction coefficients compared to steel and reducing energy losses due to friction and enhancing the overall efficiency of the bearing. This property helps in reducing heat generation and improving operating conditions.
electrical properties for precision ceramics Si3N4 silicon nitride
| Dielectric Strength | KV/mm | 1 | |||||||
| Dielectric Constant | ... | ... | |||||||
| Volume Resistivity at 20 ℃ | Ω.cm | 1.0×1012 | |||||||
| 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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sizes of ceramic rollers, Al2O3 rods, alumina cores, for fixed resistors
Alumina rollers for fixed resistors are made of alumina powder, kaolin and other materials through a series of processes such as ball milling, molding, sintering, and sand milling. They are the basic materials for resistor manufacturing and are divided into 70 series, 80 series, 85 series, and 90 series according to power requirements.
| ceramics | unit | C70 | C80 | C85 | C90 | ||||
| volume density | g/cm3 | 3.1 | 3.4 | 3.5 | 3.6 | ||||
| bibulous rate | % | <0.01 | <0.01 | <0.01 | <0.01 | ||||
| bending strength | Mpa | 180 | 270 | 300 | 300 | ||||
| compression strength | Mpa | 800 | 1000 | 1000 | 1000 | ||||
| coefficient of thermal expansion | *10-6/℃ | 6.7 | 7.4 | 7.5 | 7.8 | ||||
| thermal conductivity | W/m.k | 4.2 | 6.3 | 9.2 | 15 | ||||
| dielectric strength | Kv/mm | 10 | 10 | 10 | 10 | ||||
| dielectric constant | 1MHz | 7.5 | 8 | 9 | 9.5 | ||||
| precision ceramic rollers, Al2O3 rods, alumina cores, Al2O3 rolling elements for fixed resistors | |||||||||
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silicon nitride ceramic bearing rollers are an ideal replacement for traditional metal rollers, especially in applications that require extreme performance and durability. Its unique material properties such as high strength, wear resistance, corrosion resistance, and heat resistance make it perform well in high-speed, high load, and high temperature environments. These bearing rollers significantly improve the efficiency and reliability of the overall system by reducing energy consumption and extending equipment service life, meeting the pursuit and demand of modern industry for high-performance materials.
ceramic rollers have excellent thermal properties and can withstand high operating temperatures without significant degradation. They have a low coefficient of thermal expansion, meaning they maintain their shape and dimensions under varying temperature conditions. silicon nitride is highly resistant to corrosion and chemical attack, making ceramic rollers suitable for extreme special environments.
unlike metal rollers, silicon nitride ceramic rollers are electrically insulating. This property is beneficial in applications where electrical conductivity needs to be avoided in certain industrial processes or in electrically sensitive equipment. ceramic rollers have a self-lubricating property due to their ability to retain oil on their surfaces. This characteristic allows for reduced lubrication requirements, resulting in lower maintenance costs and improved operational efficiency.
applications of silicon nitride (si3n4) ceramics for electronics: a large variety of high performance parts are manufactured for the electrical electronic industry due ti insulating and non-magnetic properties. parts include wafer processing components, microwave specialty ceramics etc.
the density of silicon nitride is only 3.2 g/cm ³. Compared to traditional metal materials, its low density helps to reduce the overall structural weight, thereby improving the operating efficiency and speed of mechanical equipment. silicon nitride ceramic rollers are 58% lighter than steel. The reduced weight contributes to lower centrifugal forces and allows for higher operational speeds without compromising stability or generating excessive heat.