Home > Products > Ceramic Parts/Components > Alumina (Ceramic) Parts

Alumina (Ceramic) Parts

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.

Product Features:

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

Product Parameters:

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

Application and After-Sales Service:

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.

Inquiry:

*
*
Please Choose:
*