Alumina ceramic parts are made of aluminum oxide ceramics. Alumina is a ceramic material with high thermal conductivity, compressive strength, and thermal shock resistance. It also has a low thermal expansion, making it a suitable material for furnace use in the crucible, tube, and thermo couple sheath form. Aluminum oxide is high hardness and good wear resistance, making it a suitable material for ball valves, piston pumps, and deep drawing tools. In addition, alumina ceramic parts can be easily combined with metals and other ceramic materials using brazing techniques and metallization.
Excellent electrical insulation
Relatively low strength and fracture toughness
Resistance to wear and corrosive
Excellent thermal stability
Resistance to high temperatures
High electrical resistivity
Good chemical stability
High corrosion resistance
| Dimensional accuracy | Up to 0.01mm |
| Smoothness | Highest possible mirror |
| Concentricity | Up to 0.01mm |
| Parallelism | Up to 0.01mm |
| The inner hole tolerance | The minimum 0.01mm |
| Straight flute | The narrowest 0.1x100mm |
| The thickness of the size | Minimum to 0.2mm |
| The screw thread | Minimum internal thread M2 |
| Cylindricity | Up to 0.01mm |
| The linear tolerance | Up to 0.01mm |
| The smallest aperture | The minimum 0.07mm |
| Precision process | CNC maching,grinding,lapping |
| Surface finish | Glazed,polishing or metallized |
| Visual quality: 1. No cracks, no dark dots, no contamination and sharp edges; 2. Evenly distributed glaze with very smooth surface |
|
| Property | Units | ||||
| Al2O3 Content | % | 96 | 98 | 99.5 | 99.7 |
| Density | g / cm3 | 3.70 | 3.80 | 3.90 | 3.92 |
| Color | – | White | White | Ivory | Ivory |
| Compressive Strength @ 25 C | Mpa | 2229 | 2091 | 2512 | 2350 |
| Tensile Strength @ 25 C | MPa | 200 | 200 | 248 | 252 |
| Flexural Strength @ 25 C | MPa | 331 | 276 | 324 | 320 |
| Elastic Modulus @ 25 C | GPa | 290 | 331 | 366 | 380 |
| Hardness : Knoop Rockwell | (Gpa) Kg/mm2 R45N |
(11.7) 1196 79 |
(12.5) 1276 77 |
(14) 1428 85 |
(15) 1510 90 |
| Thermal Conductivity @ 25 C | W / m-Deg K | 20.8 | 28.1 |
30.7 |
31.6 |
| Coefficient of Thermal Expansion @ 25-1000 C | 1 X 10-6 / Deg C |
7.9 | 8.5 | 8.1 | 8.0 |
| Specific Heat @ 25 C | cal / g / Deg C | .184 | .184 | .182 | .180 |
| Maximum Working Temp. | Deg C | 1650 | 1650 | 1700 | 1700 |
| VolumeResitivity @25C @700 C | ohm-cm ohm-cm |
1 X 10-13 1 X 10-8 |
1X 10-13 2.2 X 10-9 |
1 X 10-13 6 x 10-7 |
1 X 10-13 6 x 10-7 |
| Dielectric Strength (@Thickness) 100Mils |
ac volts per mil |
350 | 340 | 335 | 330 |
| Dielectric Constant 1Mhz @25C |
e’ / eo | 8.6 | 9.4 | 9.7 | 10.0 |
| Dissipation Factor 1 Mhz @25C |
Tan Delta | .0004 |
.0003 |
.0003 |
.0002 |
Alumina ceramic parts are used in the following applications:
• Used for making parts for CVD, ion implants, photolithography, and semiconductor parts.
• In traditional industries, alumina ceramics are ideal for products such as injector tubes, gas nozzles and electrical insulators.
• Used as a material for industrial furnaces due to its ability to maintain its hardness at high temperatures.
• Used as protector for high temperature thermal couples.
• Used as a material for chemical industry due to its high corrosion resistance.
Our alumina ceramic parts/components are exported to USA, Canada, Europe, and South America and Southeast Asia.
After-sales service:
Accept any repair of the product, help to improve technology for customer. And also provide long-term technical help and support for you.
