Product Details

Product Description

Electrical ceramic bobbin heater

Name		Alumina	Dense Cordierite	Porous Cordierite	Cordierite-Mullite	Mullite	Corundum mullite
Density(g/cm3)		2.0~2.3	2.1 ~2.5	1.5 ~1.9	1.8~2.3	2.0 ~2.5	2.3 ~2.7
Coefficient of heat expansion(×10-6K-1)(20~800°C)		≤5	≤3.5	≤3.0	≤3.5	≤5	≤6
Specific Heat (J/Kg.K)(20~1000°C)		900~1150	900~1100	900~1100	900~1150	1000~1150	1100 ~1300
Thermal Conductivity		1.5~2.0	1.5~2.5	1.2~1.8	1.5~2.0	1.5~2.0	1.5~2.5
(W/m.k) (20~1000°C)		1.5~2.0	1.5~2.5	1.2~1.8	1.5~2.0	1.5~2.0	1.5~2.5
Impact Thermal Resistance(°C/min)		≥300	≥300	≥350	≥350	≥350	≥300
Max. Working Tem.(°C)		1350	1300	1300	1320	1450	1550
Water absorption(%)		15-25	≤2	15~25	15 ~25	15~25	15 ~25
Compressive strength		≥28	≥28	≥25	≥25	≥28	≥30
(MPa)		≥28	≥28	≥25	≥25	≥28	≥30
Chemical composition (%)	Al2O3	55 ~65	25 ~38	28 ~38	40~52	60 ~70	70 ~80
	SiO2	25~35	50 ~60	45 ~55	45 ~55	25 ~35	15 ~25
	MgO	1~3	5 ~10	11 ~14	7~9	0 ~1	0 ~2
	others	<5	<5	<5	<5	<5	<5