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U Type SIC Heating Elements

U-type SIC heating element is a kind of high-temperature resistance heating element. U-typeSIC heating element is composed of two equal radius SIC heating elements with a common cold end. SIC heating element can connect the power line at one end of the kiln. The surface temperature of the fever part is 1450 ℃. It is mainly used for high-temperature furnaces with high average temperature requirements. Its characteristics are power saving and long furnace life.

Chemical Property:

When the heating element is used in the air at 800 ℃, it begins to oxidize. When the temperature reaches 1000-1300 ℃, a layer of silica protective film is formed on the surface of the heating part. Cristobalite crystallizes at 1350 ℃, and the protective film has a certain thickness at 1450 ℃, so that the oxidation speed of the heating element becomes very slow and stable. If the temperature continues to rise above 1627 ℃, the protective film will be damaged, the oxidation rate will increase significantly, and the heating element will be damaged prematurely.
Although the oxidation of heating elements is very slow in the process of use, long-term operation will still lead to the increase of resistance. This situation is called aging. In order to slow down the aging speed, we can provide heating elements with different types of protective layers under special atmosphere conditions to improve the service life.

Physical Properties
Bulk Density 2.5g/cm3
Porosity 23%
Thermal Conductivity 14-19W/m·℃
(1000℃)
Rupture Strength 50Mpa(25℃)
Specific Heat 1.0kj/kg·℃
(25~1300℃)
Coefficient Of Thermal Expansion 4.5×10-⁶
Parameters
Nominal Loading(1000℃)
Part.No Dia(mm) Hot Zone Length(mm) Cold End Length(mm) Spacing(mm) Hot Zone Surface Area
(cm)²
Voltage(V) Power(W) Resistance(Ω)
U163030 16 300 300 40 301 121 4600 3.18
U164040 400 400 402 163 6190 4.29
U164030 400 300 402 160 6080 4.21
U165030 500 300 502 200 7600 5.26
U203040 20 300 400 50 377 112 5990 2.09
U204535 450 350 565 164 8770 3.07
U205050 500 500 628 185 99003.46 4.79
U206040 600 400 754 218 11700 4.07
U207050 700 500 879 256 13700 4.79
U254040 25 400 400 60 628 131 9370 1.83
U255040 500 400 785 163 11700 2.28
U256040 600 400 942 194 13900 2.71
U256050 600 500 924 196 14000 2.74
U257050 700 500 1099 228 16300 3.19
U258040 800 400 1256 258 18500 3.61
U305040 30 500 400 70 942 148 13800 1.58
U306050 600 500 1130 178 16600 1.90
U307050 700 500 1318 207 19400 2.21
U308040 800 400 1508 234 21900 2.50
U309050 900 500 1695 265 24800 2.83
U356040 35 600 400 80 1319 180 19100 1.68
U357040 700 400 1539 210 22200 1.96
U358050 800 500 1758 241 25600 2.26
U359050 900 500 1978 271 28800 2.54
U3510050 1000 500 2198 301 32000 2.82
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