Customized Precision Silicon Nitride Si3n4 Ceramic Substrate For Electrical Car
Material Introduction:
Silicon Nitride (Si3N4) is a widely used ceramic material in high temperature application, it has high strength in both room temperature and high temperature condition, the strength of silicon nitride can be kept up to 1200ºC; the low coefficient of thermal expansion make it a ceramic material possessing excellent thermal shock resistance; at the same time, it also has good thermal conductivity.
The main features of the Si3N4 ceramic tray and substrate
A. High thermal conductivity ( up to 70 W/m.k), 3 times that of alumina ceramic substrate;
B. The thermal expansion coefficient (3.1×10-6/ºC) matches the semiconductor silicon material (3.5-4.0×10-6/ºC);
C. The bending strength is higher than that of the alumina substrate, which is twice that of the alumina substrate;
D. Excellent electrical performance, with extremely high insulation resistance and low dielectric loss;
The specification of the ceramic tray and substrate
A. The typical thickness of the silicon nitride substrate covers 0.30mm, 0.5mm, 0.635mm, 1.0mm
B. We are supplying with many round ceramic wafers, square & rectangular ceramic substrate
C. The biggest diameter of the round ceramic wafer can be up to 400mm in 3mm, 4mm, 5mm thick
D. The max. side-length of the square and rectangular ceramic substrate can be 400mm by 500mm
E. Surface treatment: it can be one-side, or double side polished to be Ra0.4 or better
date sheet
| Item | Unit | Typical Values |
| Physical Properties |
| Density | g/cm3 | >3.2 |
| Mechanical Properties |
| Hardness | HRA90 |
| Vickers Hardness (Hv50) | HV0.5 | >1550 |
| Modulus of Elasticity | Gpa | 290 |
| Flexural Strength | Mpa | >600 |
| Compressive Strength | Mpa | 2500 |
| Fracture toughness | Mpam1/2 | >6.0 |
| Thermal Properties |
| Maximum use temperature | °C | 1200 |
| Thermal Conductivity | W/(m.k) | 15-20 |
| Thermal Expansion Coefficient | 10-6/°C | >3.1 |
| Thermal Shock Resistance | T°C | 500 |
| Specific Heat Capacity | KJ/kg.K | 700 |
| Electrical Properties |
| Dielectric Strength | KV/mm | 1 |
| Dielectric Constant | er |
| Volume Resistivity at 20°C | Ω.cm | 1.0X10(12) |
company information
Wuxi Special Ceramic Co.,Ltd mainly produces alumina, Silicon nitride, Zirconia, Steatite, Boron nitride, Cordierite,mullite products, widely used in metal welding, electronic conductor, mechanics, assembling, insulation, chemicals, instrument, textile, nuclear industry, aerial field.We accept trial produce according to the drawing or sample.It usually takes 30 days to finish trial product.Mass produce usually takes 30 days.Goods' package is carton or PLT.It can be negotiable with each other.
We mainly sell goods to toshiba lighting group in Japan and Europe.Our aim is to deliver goods with high quality at quick delivery date.
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