Алюминиевые керамические огнеупорные корундовые тигли для плавильной

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Product Description

Square High Alumina Ceramic 99% Al2o3 Refractory Crucible Used In Laboratory

Specification

Ceramic material performance index
		Alumina Ceramic				Zirconia Ceramic
Performance	Unit	≧95	≧99	≧99.5
Bulk density	g /cm3	3.7	3.85	3.85	6
Hardness	HRA ≥	86	88	88	92
Flexure strength	Mpa≧	300	350	400	1100
The max.temperature	℃	1500	1500	1500	1450
Linear expansion coefficient	×10-6/℃	7.5	8.2	8.2	10.2
Dielectric constant	εr20℃, 1MHz	9	9.2	9.2	28
Dielectric loss	tanδ×10-4, 1MHz	3	2	2	10
Volume resistivity	Ω·cm 20℃	10^13	10^14	10^14	10^14
Disruptive strength	KV/mm , DC≥	20	20	20	20
Acid resistance	mg/cm2 ≤	0.7	0.7	0.7	2
Alkali resistance	mg/cm2 ≤	0.2	0.1	0.1	0.08
Abrasive resistance	g/cm2 ≤	0.2	0.1	0.1	0.05
Compressive strength	MPa ≥	2500	2500	2500	3000
Rupture strength	MPa ≥	200	350	350	600
Elasticity modulus	GPa	300	350	350	210
Poisson ratio		0.2	0.22	0.22	0.23
Heat conductivity	W/m·K( 20℃)	20	25	25	2.6