Alumina Ceramics

     Aluminium Oxide (Alumina) is the most widely used ceramic material with near limitless manufacturing capabilities. They are grouped together based on purity levels, as the purity of Alumina’s increases wear and corrosion resistance also increases. KETAO Industrial Ceramics stocks more alumina ceramic tubes than any other supplier. Our vast, readily-available inventory allows us to supply our customer’s ceramic tube needs immediately,even for hard-to-find or specialty products. Alumina’s are used in a variety of general-purpose applications, and their grade is chosen based on the application environment. Higher purity Alumina’s can be formulated for more demanding applications. Typical Applications Include: Wear resistant components, High pressure nozzles, Thermocouple tubes,  Electrical Insulators, Corrosive labware, Furnace fixtures, Ballistic armor, Thread guides, Laser Tubes, and Pump seals.



Alumina Ceramics Description:

Features:

Hard, wear-resistant

Excellent dielectric properties from DC to GHz frequencies

Resists strong acid and alkali attack at elevated temperatures

Good thermal conductivity

Excellent size and shape capability

High strength and stiffness

Available in purity ranges from 95%, an easily metallizable composition, to 99.8% for the most demanding high temperature applications.

Typical Usage:

Electric Insulator

Electric Socket & Plug

Resister Case

Terminal Block & Base

Heat Resist Components

Fuse Holder

Cigar Lighter

Dielectric Ceramics

Components of Various Shapes

Focus Ring & Edge Ring

Wafer Finger & Robot Arm

Precision Nozzle&Disk

Plunger, Pump & Valve

Bolt,Nut & Clamp

Knife & Cutter, Jig & Fixture

Roller for Paper Manufacturing

Mechanical Seal & Water Seal

High Precision Components

Ceramic Liner

Automobile Assembly Parts

Mechanical Seal Ring

Susceptor & Crucible Boat

Chemical Pump Parts

Carbon & Graphite Components


Al2O3 content 

%

70-75

85

95

99.7

Density 

(g/cm3)

3.0

3.4

3.7

3.9

Bending Strength

(Mpa)

85N/MM2

300

364

450

Hot coefficient of expansion

 (20O°C-80O°C) 

6

7

7.6

8

Thermal Conductivity 

(W/(m.R))

17

18

20

35

Dielectric Strength 

(kv/mm)

9

10

11

12

Working Temperature 

 (Long time use)

1300

1400

1600

1750

Water Absorption 

%

5

<0.2

<0.2

<0.1-0.2