Basic Info.
Model NO.
95-99-99.5 Alumina
Material
95% 99% 99.5% Alumina
Density
3.65 - 3.95 g/cm3
Max. Working Temperature
1500 - 1700 C
Thermal Conductivity
20 - 30 W/M.K
Thermal Shock Resistance
180 - 220 T(C)
Dielectric Strength
16 - 22 Kv/Mm
Product Description
Alumina ceramic is the most mature of the engineering ceramics, offering excellent electrical insulation properties together with high hardness and good wear resistance but relatively low strength and fracture toughness. Alumina has a high melting point, high hardness, although mechanical strength is reduced at temperatures above 1000 C. Due to the relatively large coefficient of thermal expansion, thermal shock resistance is reduced.
Alumina is also an electrically insulating material, with a high electrical resistivity, increasing with purity. Good chemical stability of alumina leads to high corrosion resistance as well. It is insoluble in water and only slightly soluble in strong acid and alkaline solutions. Testing has shown that the low chemical solubility of alumina ceramics components makes them highly resistant to chemical corrosion. This is what makes high purity alumina the material of choice for components in a wide range of industrial applications.
Ceramic tubes are used when electrical insulation is necessary in high heat applications. This makes them useful for supporting electric heating elements in ovens, heaters and furnaces. Ceramics hold their shape and size under pressure. This is important in switching applications where the ceramic is used to open and close electrical contacts in a thermostat or pressure switch. Ceramic parts are very abrasion resistant and offer long life in applications where other materials would wear out quickly.
Overview of Main Physical Properties:
1. Good electrical insulation
2. High mechanical strength
3. Excellent wear resistance
4. Excellent corrosion resistance
5. Low dielectric constant
Overview of Main Applications:
1. Pump seals and other components
2. Wear resistant inserts
3. Insulating washers or bushings
4. Semiconductor components
5. Aerospace components
6. Automotive sensors
7. Electrical or electronic insulators
We can supply the products according to customer's drawings, samples and performance requirement. What can UNIPRETEC supply:
1. Ceramic Tubes/Rods/Shafts
2. Ceramic Plates/Sheets/Rings
3. Ceramic Valves
4. Ceramic Sleeves/Bushings
5. Ceramic Insulators
6. Ceramic Screws/Bolts/Nuts
About UNIPRETEC:
UNIPRETEC, advanced ceramics expert, provides component and custom integrated packaging solutions for Aerospace, Medical, Power Generation & Distribution, Automotive, Process Control & Monitoring, Industrial Equipment, Electronic & Electrical.
Our manufacturing of high-performance ceramic products is based on very high quantities in Alumina, Zirconia, Zirconia Toughened Alumina, Silicon Carbide, Silicon Nitride and further special materials. Along with these materials, we offer several machining from which to choose such as cutting, drilling, sawing, turning, grinding, polishing etc...Furthermore, our technologies and equipments allow us to provide various and flexible forming processes, like dry pressing, isostatic pressing, extrusion, injection moulding and slip casting.
However, if you have a need for a specific guide not shown, please send us a drawing, sample or digital picture so we can identify it for quotation. We greatly appreciate an opportunity to serve you and look forward to your requests.
Characteristics |
Unit |
95 Al2O3 |
99 Al2O3 |
ZrO2 |
GPSi3N4 |
BN |
Glass Ceramic |
Crystal Structure |
- |
hexagonal |
hexagonal |
tetragonal |
hexagonal |
hexagonal |
- |
Color |
- |
white |
ivory |
white |
gray |
white |
white |
Density |
g/cm³ |
3.65 |
3.88 |
5.95 |
3.22 |
2.26 |
2.55 |
Water Absorption |
% |
0 |
0 |
0 |
0 |
0.0-1.0 |
0 |
Young's Modulus |
Gpa |
280 |
350 |
205 |
295 |
670 |
65 |
Vickers Hardness |
Gpa |
14 |
20 |
12 |
18-20 |
- |
- |
Flexural Strength |
Mpa |
280 |
300 |
900 |
650 |
51 |
100 |
Compressive Strength |
Mpa |
2000 |
2500 |
2200 |
2200 |
23 |
500 |
Thermal Conductivity |
W/(m•K) |
18-25 |
30 |
2.2 |
25 |
20 |
1.70 |
Thermal shock resistance |
ΔT(C°) |
220 |
180-200 |
280-350 |
450-650 |
>1500 |
25-100 |
Max. Working Temperature |
C° |
1500 |
1700 |
850 |
1200 |
960 |
800 |
Volume Resistivity |
Ω . cm |
>10^15 |
>10^14 |
>10^12 |
>10^14 |
10^13 |
10^16 |
Dielectric Constant |
- |
9.50 |
9.80 |
26 |
8.20 |
4.08 |
6.02 |
Dielectric Strength |
kV/mm |
16 |
22 |
- |
16 |
375 |
40 |
Address:
No. 153 Yuehua Road, Xiamen, Fujian, China
Business Type:
Manufacturer/Factory, Trading Company
Business Range:
Electrical & Electronics, Industrial Equipment & Components, Manufacturing & Processing Machinery, Metallurgy, Mineral & Energy, Textile, Tools & Hardware
Management System Certification:
ISO 9001, OHSAS/ OHSMS 18001
Company Introduction:
UNIPRETEC manufactures, develops and supply components made of technical ceramics, which include Al2O3 Alumina, BN Boron Nitride, SiC Silicon Carbide, Si3N4 Silicon Nitride, ZrO2 Zirconia...
With experience in research and development in technical ceramic materials, process development, manufacturing of precision components and small assemblies for the various applications for the Automotive, Aerospace, Oil & Fas Industries, Foundries, Food, Medical, Chemical etc. And also consulting & working with many customers and partners around the world, we welcome any opportunity related to above products from anyone who is interested in for development or sourcing high tech ceramic components from us.
If you need any further information, please do not hesitate to contact us online.