Wear Resistant Alumina Ceramic Cylinder Tube

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Alumina is the most well-known and most commonly used fine ceramic material. It has the same sintered crystal body as sapphire and ruby. It has been used for decades in electrical components for its high electrical insulation, and is widely used in mechanical parts for its high strength, and corrosion- and wear-resistance.

Properties		Units	Alumina(Al2O3)
			Porous	Mullite	Al2O3 92%	Al2O3 96%	Al2O3 99%	Al2O3 99.5%
			Al2O3	Mullite	Al2O3 92%	Al2O3 96%	Al2O3 99%	Al2O3 99.5%
Mechanical	Density	g/cm3		2.8	3.6	3.7	3.9	3.9
	Color	——	——	Tan	White	White	Ivory	Ivory
	Water Absorption	%		0	0	0	0	0
	Vickers Hardness	Gpa	——	7.4	11	11.5	13	14
	Flexural Strength (20°C)	Mpa	50~100	170	345	358	380	380
	Compressive Strength (20°C)	Mpa	20~100	550	2200	2300	3000	3000
Thermal	Thermal Conductivity (20°C)	W/m.K	3.1	3.5	16.7	24.8	25~35	25~35
	Thermal Shock Resistance (20°C)	ΔT(C)	——	300	250	250	200	200
	Maximum Use Temperature	°C	1900	1700	1500	1600	1700	1700
Electrical	Volume Resistivity (25°C)	Ω.cm	——	>1014	>1014	>1014	>1014	>1014

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

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