Product Specifications
| Prod Model: |
HDC003 |
| Markets: |
North America,South America,Eastern Europe,Southeast Asia,Africa,Oceania,Mid East,Eastern Asia,Western Europe |
| Material: |
Silicon Nitride |
| Color: |
Dark Grey |
| Density: |
3.20 g/cm3 |
| Flexural Strength: |
650 MPa |
| Corrosion Rate: |
0.001-0.01 |
| Thermal Shock Resistance: |
450-650 T(C) |
| Compressive Strength: |
2200 MPa |
| Thermal Conductivity: |
25 W/M.K |
| Max. Working Temperature: |
1200 C |
| Water Absorption: |
0% |
| Quality: |
First Class |
| Classification: |
Silicon Dioxide |
| Grade Standard: |
Industrial Grade |
Product Description
Properties of Gas Pressure Sintered Si3n4 Silicon Nitride Ceramics
(1). Excellent in electrical insulation;
(2). High hardness and wear/corrosion resistance;
(3). High working temperature and thermal shock resistance
1. About Si3n4 Silicon Nitride Ceramics
Silicon Nitride has the most versatile combination of mechanical, thermal, and electrical properties of any technical ceramic material. It is a high performance technical ceramic that is extremely hard and has exceptional thermal shock and impact resistance. It surpasses most metals high temperature capabilities and has a superior combination of creep and oxidation resistance and high strength. Additionally, its low thermal conductivity and high wear resistance make it an excellent material that can withstand the toughest of conditions in the most demanding industrial applications. Silicon Nitride is an excellent choice when high-temperature and high-load abilities are needed.
2. Si3N4 Silicon Nitride Ceramics Properties:
- High strength over a large temperature range
- High fracture toughness
- Good flexural strength
- Mechanical fatigue & creep resistant
- Lightweight Low density
- High hardness and wear resistance, both impingement and frictional modes
- High stiffness
- Wear resistant
- Superior thermal shock resistance
- Does not break and its strength does not decline even when repeatedly dropped into room-temperature water after heating to 1, 400 ° C.
- Low thermal expansion
- Electrical insulator
- Good oxidation resistance
- Good chemical corrosion resistance
3. Si3N4 Silicon Nitride Ceramics Applications:
- Rotating ball & rollers bearings
- Cutting tools
- Engine moving parts _ valves, turbocharger rotors, rocker arm pads
- Induction heating coil supports
- Turbine blades, vanes, buckets
- Welding & brazing jigs
- Heating Element components
- Crucibles
- Metal tube forming rolls and dies
- TIG / Plasma welding nozzles
- Weld positioners
- Precision shafts and axles in high wear environments
- Thermocouple sheaths & tubes
- Semiconductor Process Equipment
|
Characteristics |
Unit |
95 Al2O3 |
99 Al2O3 |
ZrO2 |
GPSi3N4 |
BN |
Glass Ceramic |
|
Crystal Structure |
- |
hexagonal |
hexagonal |
tetragonal |
hexagonal |
hexagonal |
- |
|
Color |
- |
white |
ivory |
white |
gray |
white |
white |
|
Density |
g/cm³ |
3.65 |
3.88 |
5.95 |
3.22 |
2.26 |
2.55 |
|
Water Absorption |
% |
0 |
0 |
0 |
0 |
0.0-1.0 |
0 |
|
Young's Modulus |
Gpa |
280 |
350 |
205 |
295 |
670 |
65 |
|
Vickers Hardness |
Gpa |
14 |
20 |
12 |
18-20 |
- |
- |
|
Flexural Strength |
Mpa |
280 |
300 |
900 |
650 |
51 |
100 |
|
Compressive Strength |
Mpa |
2000 |
2500 |
2200 |
2200 |
23 |
500 |
|
Thermal Conductivity |
W/(m•K) |
18-25 |
30 |
2.2 |
25 |
20 |
1.70 |
|
Thermal shock resistance |
ΔT(C°) |
220 |
180-200 |
280-350 |
450-650 |
>1500 |
25-100 |
|
Max. Working Temperature |
C° |
1500 |
1700 |
850 |
1200 |
960 |
800 |
|
Volume Resistivity |
Ω . cm |
>10^15 |
>10^14 |
>10^12 |
>10^14 |
10^13 |
10^16 |
|
Dielectric Constant |
- |
9.50 |
9.80 |
26 |
8.20 |
4.08 |
6.02 |
|
Dielectric Strength |
kV/mm |
16 |
22 |
- |
16 |
375 |
40 |
Shenzhen HARD Precision Ceramics Co., Ltd. is a development, design, production, sales of advanced precision ceramic products.
HARD fine ceramic products are widely used in industrial machines and electronic equipment and devices. The superior electrical characteristics of fine ceramics are utilized in a variety of circuit boards and electronic parts. Their wear and corrosion resistance is beneficial in pumps nozzles and valve parts, and their high heat and thermal shock resistance is useful in ceramic engine parts.
