high temperature Ceramic Furnace Support Tubes

We mainly produce alumina tubes, rods and various industrial ceramic parts, which are mainly used in thermalcouple temperature,

Ceramic Supporting Rollers for Glass Tempering Furnaces

 

In glass tempering furnaces the glass is transported on rollers through the furnace. Product is run directly on the rollers, i.e. without supports.

The tempering time can be regulated via the rotational speed of the rollers as well as by applying different heating systems.

 

All large sized glass plates are subject to this secondary thermal treatment because of new regulations. (single pane safety glass)

 

Reasons for Tempering Glass

The aim of this process is to cause prestressing the glass through heat, 

so that there are no sharp splinters if the glass breaks. Like safety glass, the pane must break into many harmless particles.

 

Properties of Ceramic Rollers for Glass Tempering

 

Because of the sensitivity of the glass surface, the ceramic rollers used must be very smooth and free of the smallest undulation. The bending and the concentricity are very important factors, too.

 

Furthermore, the ceramic material must have good thermal shock resistance properties in order to withstand changes of temperature occurring in the process.

 

Materials for Glass Tempering Furnace Rollers

The material used for these rollers is our Fused Silica/quartz. In use today are solid as well as quartz or fused silica rollers which can be supplied with mounted metal end caps.

If you are interested,please contact us for more details and attractive price.

Main performance index
Serial number	performance index	Measuring unit	High purity alumina	Alumina	High alumina
1	Al2O3	%	99.7	99.3	85
2	SiO2	%	less than0.1	—	—
3	Density	g/cm3	3.95	3.88	3.2
4	Wter absorption	%	0	0.01	0.2
5	Cld compressive strength	MPa	450	350	200
6	20 degree Celsius leak rates	Torr/L.sec	less than10-11	less than10-11	less than10-11
7	Twisting in high temperature	mm	1700 degree Celsius 0.2 allowance	1600 degree Celsius 0.2  allowance	1400 degree Celsius 0.2 allowance
8	Bonding in high temperature		1700 degree  Celsius non-caked	1600 degree Celsius non-caked	1400 degree Celsius non-caked
9	20—1000 degree Celsius coefficient of	mm.10-6/degree Celsius.m	8.6	8.2	8.2
	thermal expansion
10	Thermal conductivity	W/m.k	25	25	25
11	Electric insulation strength	KV/mm	20	20	15
12	20 degree Celsius direct current	Ohm/cm	1014	1014	1014
	insulating resistance
13	High-temperature	1000 degree Celsius MΩ	≥0.08	≥0.08	≥0.08
	insulation resistance	1300 degree Celsius MΩ	≥0.02	≥0.02	≥0.02
14	Thermal shock resistance		1550 degree  Celsius 6 times not racked	1550 degree Celsius 6  times not cracked	1300 degree Celsius 3 times not cracked
15	Maximum service temperature	degree Celsius	1900	1800

We are an ISO certified Factory, specializing in production of 

engineering ceramic, industrial ceramics and electric ceramic products. 

Main material include:

Corundum: 95% alumina, 99% alumina, 99.7% alumina

Alumina: 85% alumina

Mullite: 75% alumina

Chemical Ceramic: 40% alumina

Magnesia: 98% magnesia, 99.5% magnesia

Fused silica/Quartz glass heating elements

Our products include:

 high temperature roller tube for furnace and kiln ,

 thermocouple protection tube,

 muti-bore insulation tube, 

 ceramic roller & rod, 

 ceramic crucible and boat,

 wear resistant ceramic tiles and balls.

Custom products are available from us.

With more than 10 years experiences, our ceramic products enjoy a high 

reputation for the high quality, stable performance, longer working life ,both at home and abroad. 

If you are interested,please contact us for more details and attractive price.

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high temperature Ceramic Furnace Support Tubes