Product Details

95% Alumina Ceramic Disc for Ceramic Water Valve

Description

Aluminum Oxide, Al2O3 and ZrO2 are the most widely applied and cost effective technical ceramic material. It offers a combination of superior mechanical strength and electrical properties, wear resistance and corrosion resistance. The maximum working temperature is up to 1700 °C with relatively high thermal conductivity. It is also an electrically insulating material with a high electrical resistivity. The good corrosion resistance makes it insoluble in water and slightly soluble in strong acid and alkaline solution.

Material

Unit	95% Al2O3	99% Al2O3	ZrO2
Color	-	white	ivory
Density	g/cm³	3.65	3.88
Water Absorption	%	0	0
Young's Modulus	Gpa	280	350
Vickers Hardness	Gpa	14	20
Flexural Strength (at R.T.)	Mpa	280	300
Compressive Strength (at R.T.)	Mpa	2000	2500
Thermal Conductivity (at R.T.)	W/(m.K)	18-25	30
Thermal Shock Resistance	ΔT(°C)	220	180-200
Max. Working Temperature (at R.T.)	°C	1500	1700
Volume Resistivity (at R.T.)	Ω.cm	>10^15	>10^14
Dielectric Constant (1 MHz at R.T.)	-	9.50	9.80
Dielectric Strength	kV/mm	16	22

Typical Application

Wire and thread guides	- Ballistic Armor
- Mechanical seals	- Wear resistant linings
- Seal faces	- Semiconductor parts
- Valve seats	- Laser cavities
- Machine components	- Shot blast nozzles
- High temperature electrical insulators	- Knife Sharpeners
- High voltage insulators	- Precision shafts & axles in high wear environments
- Electronic components & substrates	- Roller & Ball Bearings

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