Dongguan Ming Rui Ceramic Technology Co.,ltd
Dongguan Ming Rui Ceramic Technology Co., Ltd
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Insulating Zirconia ZrO2 Ceramic Location Dowel Pin For Welding
| Product Name | Insulating Zirconia ZrO2 Ceramic Location Dowel Pin For Welding |
| Material | Zirconia |
| Color | White, Black |
| OD | 0.2mm - 50mm, And According to drawings |
| Length | 5mm - 400mm, And According to drawings |
| Surface Roughness | Ra0.05 |
| Torlerance | +/- 0.001mm |
| Lead time: | 15 - 30days |
| Max. working temperature | 1500 -1700 °C |
| Samples | Avaliable |
| Shipping: | Air Express (DHL/UPS/TNT/ FedEx) or Ocean Shipping |
During the process of high precision electric resistance welding, the accurate locating of nuts on workpiece is an important problem needed to be solved, therefore welding location dowel pin was produced. In the past, KCF welding pins was used extensively, but the pins are electric conductive with only a small insulating layer on the outside surface. When the insulating layer was worn, electric spark will occur and easily damage thread of nuts, leading to unnecessary repair of nuts and affecting production efficiency.
Zirconia ceramic has good electrical insulation, zirconia ceramic welding pins willl have no the same problem as KCF pins. Moreover, zirconia ceramic has very high hardness and good wear resistance, ceramic pins will have much longer lifespan than KCF, it will reduce the process to exchange of welding pins.
1. Electrical Insulation
2. High Hardness (Moh's hardness 9)
3. Low wear loss
4. Much longer lifespan, reducing the frequent exchange
Mingrui offers you a wide range of production facilities like extrusion, injection moulding, pressing and casting. Depending on product geometry and quantities, we will choose the suitable technique for your products.For the final finishing of the parts we use CNC machining centres, equipped with diamond tools in order to meet high accuracies.
Our aim is to offer the ideal solution for any application. Our engineers therefore offer custom solutions that range beyond our existing product portfolio. With our well-equipped industrial development facilities, we produce innovations that can be rapidly commercially exploited.
Properties Sheet of zirconia and alumina :
| Properties | Units | 95 Alumina | 99 Alumina | ZrO2 |
| Density | g / cm³ | 3.65 | 3.92 | 5.95-6.0g/cm³ |
| Water absorption | % | 0 | 0 | 0 |
| Coefficient of thermal expansion | 10-6/K | 7.9 | 8.5 | 10.5 |
| Modulus of Elasticity Young's Mod | GPa | 280 | 340 | 210 |
| Poisson's ratio | / | 0.21 | 0.22 | 0.3 |
| HV Hardness HV | MPa | 1400 | 1650 | 1300-1365 |
| Flexural Strength @ room temperature | MPa | 280 | 310 | 950 |
| Flexural Strength @700°C | MPa | 220 | 230 | 210 |
| Compressive Strength @ room temperature | MPa | 2000 | 2200 | 2000 |
| Fracture Toughness | MPa *m 1/2 | 3.8 | 4.2 | 10 |
| Heat conductivity @ room temperature | W/ m*k | 18-25 | 26-30 | 2-2.2 |
| Electrical Resistivity @ room temperature | Ω*mm2 /m | >1015 | >1016 | >1015 |
| Max use temperature | °C | 1500 | 1750 | 1050 |
| Resistance to acid alkaline | / | high | high | high |
| Dielectric Constant | / | 9.5 | 9.8 | 26 |
| Dielectric Strength | KV/mm | 16 | 22 | / |
| Thermol Shock Resistance | △ T ( °C ) | 220 | 180-200 | 280-350 |
| Tensile Strength @ 25 °C | MPa | 200 | 248 | 252 |
