Heat resistant alumina laboratory crucibles for melting zinc,alumina,copper,gold and silver

Heat resistant alumina laboratory crucibles 1.Al2O3>=99.7% 2.Density,3.85g/cm3 3.Flexural strength, 360Mpa 4.Max. temp.1800

Heat resistant alumina laboratory crucibles for melting zinc,alumina,copper,gold and silver

Features:

1. High purity, (Al2O3≥99.7%; Fe2O3≤0.1%; SiO2≤0.2%.)

2. High chemical etching resistance,

3. Temperature tolerance, 1600°C for long term application; 1800°C for short term application,

4. Resistant to sudden cold and hot, un-explosive,

5. High density of slip casting.

 

Physical Character: 

TYPICAL PHYSICAL PROPERTIES
AL2O3      %Composition	60	75	80	85	92	95	99	99.8
Densityg/cm3	3.0	3.1	3.3	3.4	3.6	3.7	3.81	3.91
Flexural Strength(MPa)	205	280	215.7	230	312	304	340	370
Thermal Expansion(×10-6/)25-800	7.1	7.6	7.6	7.6	7.5	7.3	7.6	7.6
Thermal Conductivity[w/(m.R)]	16	17	17	17	18	20	34	35
Dielectric Strength (KV/mm)	10	10	10	10	10	10	10	10
Resistivity (Ω.cm)20	1014	1014	1014	1014	1014	1014	1014	1014
300	1013	1013	1013	1013	1013	1012	1010	1010
Max Service Temp.	1350	1100	1300	1350	1500	1600	1700	1800
Hardness (Moh'sscale)	7.5	7.5	7.5	7.5	8.5	8.8	9	9
	1800	1700	1800	1850	1920	2000	2030	2040

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Heat resistant alumina laboratory crucibles for melting zinc,alumina,copper,gold and silver