Xiamen Unipretec Ceramic Technology Co., Ltd.

China Manufacturer with main products: Alumina Ceramic, Zirconia Ceramic, Silicon Nitride, Boron Nitride, Ceramic Grinding Media, Ceramic Cutting Blade, Ceramic Dosing Pump,...

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Ceramic Insulator Rings

FOB Price: 1.00 - 2.00 USD/Piece
Supply Ability: 10,000 Piece/Pieces per Month
Shipping: 30 days, Xiamen Port
Payment Terms: L/C, T/T, Western Union
In Stock
Export Markets: North America, South America, Eastern Europe, Southeast Asia, Oceania, Mid East, Eastern Asia, Western Europe
Place of Origin: Fujian in China
Packaging Details: wooden case / carton box

Quick Details

  • Brand Name: UNIPRETEC
  • Model Number: AL2O3
  • color: white, ivory
  • material: 95 alumina, 99 alumina, zirconia


Ceramic Materials Frequently Used:

- Alumina
- Silicon Carbide
- Boron Carbide
- Zirconia
- Cordierite
- Mullite
- Macor
- Silicon Nitride
- Boron Nitride
- Steatite
Aluminum Oxide
Aluminum oxide is the workhorse of advanced technical ceramics. It has good mechanical and electrical properties, wear resistance and corrosion resistance. It has relatively poor thermal shock resistance. It is used as an electrical insulator for a number of electrical and electronic applications, including spark plug insulators and electronic substrates. It is also used in chemical, medical and wear application.
Zirconium Oxide
Zirconium oxide has the highest fracture toughness of any advanced technical ceramics. Its toughness, mechanical properties and corrosion resistance make it ideal for medical and selected wear applications. Its thermal expansion coefficient is ver colse to steel, making it an ideal plunger for use in a steel bore. Its properties are derived from a very precise phase composition. Some environmental conditions can make the materials unstable, causing it to lose its mechanical properties. Its relatively low hardness and high weight also limit its broad use in wear applications.
Silicon Carbide
Silicon carbide has outstanding wear and thermal shock resistance. It has good mechanical properties, especially at high temperatures. It is a semiconductor material with electrical resistivities in the 10^5 ohm-cm range. It can be processed to a very high purity. Silicon carbide is used extensively for mechanical seals because of its chemical and wear resistance.
Boron Carbide
Boron carbide is the hardest material after diamond, giving it outstanding wear resistance. Its mechanical properties, especially its fracture toughness, are low, limiting its application. However, it is used extensively for ballistic armor and blast nozzles. Boron carbide is also a neutron absorber, making it a primary choice for control rods and other nuclear applications.
Silicon Nitride
Silicon nitride has the best combination of mechanical, thermal and electrical properties of any advanced technical ceramic material. Its high strength and toughness make it the material of choice for automotive and bearing applications.

Some of the highly desirable properties of ceramics are:

- High Strength
- High Fracture Toughness
- High Hardness
- Excellent Wear Resistance
- Good Frictional Behaviour
- Anti-Static
- Non-Magnetic
- Low Thermal Conductivity
- Corrosion Resistance in acids and alkalis
- Excellent Surface Finish (0.006 μm Ra)
- Modulus of Elasticity similar to steel
- Thermal Expansion Coefficient similar to cast iron

Characteristics Unit 95 Al2O3 99 Al2O3  ZrO2 SSiC B4C Si3N4
Color white ivory white black black gray
Density g/cm3 3.65 3.88 6.05 3.12 2.51 3.25
Young's Modulus Gpa 280 350 205 400 420 310
Vickers Hardness Gpa 14 20 12 25 36 22
Flexural Strength Mpa 280 300 900 400 370 850
Compressive Strength Mpa 1700 2000 2500 2200 2900 2800
Thermal Conductivity W/(m?K) 25 30 2.2 100 35-40 27
Thermal shock resistance ΔT(C°) 220 180-200 400 350 130 450-650
Max. Working Temperature 1500 1700 850 1500 1500 1200
Volume Resistivity ( 20 C° ) Ω?cm >10^15 >10^14 >10^12 >10^6 _ >10^14

Ceramic Parts & Components include:

- microwave loads
- high temp clamps
- abrasive nozzles
- brazing fixtures
- heater cores
- ceramic guides
- ceramic discs
- high temp wear parts
- ring laser gyro bodies
- corrosive atmosphere manifolds
- electrical feed-throughs
- high temp clamps
- rings

Our Markets:

- Aerospace (Military & Civil)
- Automotive
- Defence
- Dentistry
- Domestic Household
- Electronics & Opto-Electronics
- Energy & Power Generation
- Foundry
- Medical
- Nuclear Power
- Offshore Oil & Gas
- Transportation

Technical Ceramics Processing

Ceramic forming processes may be classified as traditional – die pressing, cold isostatic pressing, slip casting, and extrusion – or as new and emerging, such as injection moulding and tape casting. Some traditional methods have been refined or adapted to meet particular property requirements. These include hot pressing, hot isostatic pressing, and pressure casting.

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