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Wear Resistance 99.7% Half Alumina Ceramic Ring Custom Machined Furance Al2O3 Ceramic Components
| Place of Origin | Handan |
|---|---|
| Brand Name | Norcera |
| Certification | ISO |
| Document | Alumina Ceramics Applicatio...on.pdf |
| Minimum Order Quantity | 1 Piece |
| Price | 1$~100$ |
| Packaging Details | Wooden Cages Or Carton Box |
| Delivery Time | 10-15 Work Days |
| Payment Terms | T/T |
| Supply Ability | 2000 Pieces Per Week |
Product Details
| Product Name | Alumina Ceramic Half Rings | Color | White Or Ivory |
|---|---|---|---|
| Material | Alumina Oxide (Al2O3) | Wear Resistance | High |
| Coefficientofthermalexpansion | 5.2 - 7.9 X 10⁻⁶/°C | Manufacturing | Sintering |
| Compressive Strength | 300 - 350 Kpsi | Thermal Conductivity | 18.0 - 28.0 W/mK |
| Operating Temperature | Up To 1600°C | Tensile Strength | 28 Kpsi |
| Electrical Insulation | High | Chemical Resistance | Excellent Against Acids And Alkalis |
| Density | 3.7 G/cm³ | Hardness | Mohs 9 |
| Tolerance | Up To ±0.005mm | Surface Roughness | Ra0.4±0.1μm |
| Applications | Electrical Insulation, Mechanical Support, High Temperature Environments | ||
| Highlight | Half Alumina Ceramic Ring,Custom Machined Alumina Ceramic Products,Alumina Ceramic Products High Temperature |
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Product Description
Custom Machined Alumina Ceramic Half Ring for Tube Furance Insulation
Alumina ceramic part is produced by firing a tightly packed powder form of Al2O3 which includes some binder material. Commercially available grades range from 90% up to 99.95% with the higher purity generating somewhat higher hardness. It is possible to machine alumina using diamond grinding techniques. Polishing is also possible, with the degree attainable affected by alumina grain size and production technique, like pressed or extruded.
Alumina half‑ring is a precision structural ceramic part made of high‑purity alumina, processed by isostatic pressing, high‑temperature sintering and fine machining. It features a semi‑circular split‑ring geometry, designed for assembling and lining circular chambers, furnace tubes and heating modules.
Boasting excellent high‑temperature resistance, outstanding thermal‑shock performance and superior chemical inertness, the alumina half‑ring can withstand long‑term service under high‑heat and corrosive atmosphere environments. Low thermal conductivity provides thermal insulation effect, while high mechanical hardness and wear resistance extend service life under cyclic temperature changes.
The split half‑ring structure brings great convenience for installation, maintenance and replacement without disassembling the whole furnace tube. Tight machining tolerance ensures good fitting accuracy when multiple half‑rings are spliced into a full circle.
Commonly used as furnace insulation segments, inner lining spacers, supporting blocks and shielding components for tube furnaces, sintering furnaces and thermal treatment equipment. Custom‑made outer diameter, inner diameter, thickness and arc size are available upon customer drawings and samples.
Alumina Oxide (Al2O3) Properties:
◆ High Hardness
Strong wear resistance, durable and not easy to wear.
◆ Excellent Thermal Conductivity
The thermal conductivity at room temperature is 30~40W/(m·K), which is higher than that of steel, copper and aluminum.
◆ Good Chemical Stability
Resistant to acid, alkali and salt corrosion.
◆ High Temperature Stability
Withstands 1600℃ high temperature and has high temperature stability.
| Chemical Formula | Al2O3 | |
| Mechanical | Density | 3.7 gm/cc |
| Hardness | 2000 Knoop | |
| Tensile Strength | 28 kpsi | |
| Modulus Of Elasticity | 41 - 46 x 106 psi | |
| Flexural Strength | 51 kpsi | |
| Compressive Strength | 300 - 350 kpsi | |
| Poissons Ratio | 0.21 | |
| Fracture Toughness | 4 - 5 MPa m½ | |
| Electrical | Dielectric Strength | 212 - 220 ac V/mil |
| Dielectric Constant | 9.3 (@ 1 MHz) | |
| Volume Resistivity | > 1014 ohm-cm | |
| Thermal | Coefficient Of Thermal Expansion | 5.2 - 7.9 x 10⁻⁶/°C |
| Thermal Conductivity | 18.0 - 28.0 W/mK | |
| Specific Heat | 0.21 cal/g °C | |
| Shock Resistance | 300 °C Diff. | |
Typical Applications Include:
Wear resistant components,
High pressure nozzles,
Thermocouple tubes,
Electrical Insulators,
Corrosive labware,
Furnace fixtures,
Ballistic armor,
Thread guides,
Laser Tubes,
Pump seals.
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