The specific applications of ceramic sticks in band heaters mainly revolve around three core roles: fixing the heating element, optimizing heat transfer, and ensuring safe insulation.
1. Fixing & Positioning the Heating Wire
Ceramic sticks have pre-drilled holes or grooves to thread and secure the high-temperature heating wire (e.g., nickel-chromium alloy wire). This prevents the wire from shifting, overlapping, or touching the metal shell of the band heater during operation—avoiding short circuits and uneven heating caused by wire displacement.
2. Enhancing Heat Conduction Efficiency
As a material with excellent thermal conductivity, ceramic sticks quickly transfer the heat generated by the heating wire to the inner wall of the band heater. This allows the heater to uniformly transfer heat to the heated object (e.g., plastic extruder barrels, injection molding machine nozzles), ensuring stable and efficient heating of the target.
3. Providing High-Temperature Electrical Insulation
Ceramic sticks act as an insulation barrier between the energized heating wire and the metal body of the band heater. They maintain reliable insulation even at high temperatures (often above 500°C), preventing current leakage to the metal shell and eliminating safety hazards like electric shocks.
Technical Parameters
| Item |
Unit |
Zirconia ceramic |
99% alumina ceramic |
96% alumina ceramic |
95% alumina ceramic |
Steatite ceramic |
Mullite ceramic |
Cordierite ceramic |
| Bulk density |
g/cm3 |
6 |
3.8 |
3.7 |
3.6 |
2.8 |
2.2 |
2.3 |
| Water absorption |
% |
0 |
0 |
0 |
0 |
0 |
12 |
12 |
| Thermal Conductivity |
(w/m.k) |
10 |
19-30 |
16-28 |
14-24 |
2-3 |
2-6 |
1.3-1.8 |
| Resistance to thermal shock,Minimum |
TK? |
70 |
150 |
140 |
140 |
80 |
150 |
300 |
| Withstand voltage,Minimum |
KV |
15 |
20 |
18 |
18 |
20 |
25 |
- |
| Flexural strength |
Mpa |
1000 |
300 |
280 |
240 |
120 |
120 |
30 |
| Sintering temperature |
β |
1500 |
1670 |
1600 |
1600 |
1250 |
1250 |
1250 |
| Maximum working temperature |
β |
1200 |
1500 |
1200 |
1200 |
800 |
1000 |
1000 |
Application
Specifically used for high-temperature and high-voltage insulation parts, circuit substrates, high-temperature devices, etc. As the main representative of precision ceramic materials, it is widely used in industries such as semiconductors, petrochemicals, and electronics.
Advantages
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Certificate
FAQ
1. How can you get quotation?
Please kindly send me your drawing with technic requirement and demand quantity.
If you don't have the drawing, please kindly courier samples to us. we will quote our best price in 24 hours.
2. How can you get samples?
We can supply free samples if we have them in stock. If we haven't produce the products, we can supply some free samples after getting tool fee. Please take note that the courier fee should be at destination.
3. What’s the lead-time for samples and batch orders?
It is 18days for supplying samples. It is around 25days for batch orders.
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