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Packaging & Delivery
Product Description
Silicon Nitride Ceramic:
Silicon nitride ceramic is an inorganic material ceramic that does not shrink when sintered. Silicon nitride is very strong, especially hot pressed silicon nitride, which is one of the hardest substances in the world. It has high strength, low density and high temperature resistance.
Si3N4 ceramic is a covalent bond compound. The basic structural unit is a [SiN4] tetrahedron. The silicon atom is located at the center of the tetrahedron. There are four nitrogen atoms around it, which are located at the four vertices of the tetrahedron, and then every three A tetrahedron shares the form of an atom, forming a continuous and robust network structure in three dimensions.
Alumina ceramic properties:
High hardness, high strength, wear resistance, corrosion resistance, high temperature(1200°), good thermal diffusivity, good thermal shock resistance(avoid the temperature changing rapidly), good insulativity, low density. The comprehensive properties are best in most of structure ceramic.
| Property | Unit | Material | ||||
| Si3N4 | 99.5% Al2O3 | 99% Al2O3 | 96% Al2O3 | ZrO2 | ||
| Density | g/cm3 | ≥3.20 | ≥3.90 | ≥3.85 | ≥3.65 | ≥6.0 |
| Water absorption | % | - | 0 | 0 | 0 | 0 |
| Hardness | HV | - | 1700 | 1700 | 1500 | 1300 |
| Flexural strength | Mpa | ≥600 | ≥379 | ≥338 | ≥320 | ≥1200 |
| Compressive strength | Mpa | ≥2500 | ≥2240 | ≥2240 | ≥2000 | ≥1990 |
| Fracture toughness | Mpa m1/2 | 6 | 4-5 | 4-5 | 3-4 | 6.5-8 |
| Max. service temperature | ºC | 1200 | 1675 | 1600 | 1450 | 1000 |
| Coefficient of thermal expansion (CTE) | 1×10 -6 /ºC | 3.2 | 6.5~8.0 | 6.2~8.0 | 5.0~8.0 | 8.0~9.5 |
| Thermal shock | T(ºC) | ≥600 | ≥250 | ≥200 | ≥220 | ≥300 |
| Thermal conductivity(25ºC) | W/m.k | 20 | 30 | 29 | 24 | 3 |
| Volume resistivity | ohm.cm | |||||
| 25ºC | - | >1 x 10 14 | >1 x 10 14 | >1 x 10 14 | >1 x 10 11 | |
| 300ºC | - | 1 x 10 12 | 8 x 10 11 | 10 12 -10 13 | 1 x 10 10 | |
| 500ºC | - | 5 x 10 10 | 2 x 10 9 | 1 x 10 9 | 1 x 10 6 | |
| Insulation strength | KV/mm | 19 | 18 | 18 | 17 | |
| Dielectric constant(1Mhz) | (E) | 6 | 9.7 | 9.5 | 9.5 | 29 |
Yixing City is the famous pottery capital in China. Most of Chinese ceramic industry is in Yixing. Jiangsu Fist Special Ceramic Co., Ltd is located in Yixing, established in 2016.
1. We support OEM and ODM;
2.Timely response to your inquiry, multiple choice recommendations based on your demand, quickly respond mails and provide solutions;
3.Provide sample and trial order are accepted for the quality evaluation;
4.Arrange production on time and control quality strictly;
5. Book the earliest vessel or plane to guarantee the delivery time;
6. Provide all the detailed news and pictures from order to delivery;
Offer relative export documents and original certificate if needed;
7. Warm and considerable after-sale service.
Q: How long is your delivery time?
A: Generally it is 5-10 days if the goods are in stock. or it is 15-30 days if the goods are not in stock or customeriziation, it is according to quantity.
Q: How about the payment terms?
A: T/T or L/C are okay. We can negotiate.
Q: How can you get quotation?
A: Please kindly send me your drawing with technical requirement and demand quantity.
If you don't have the drawing,please kindly courier samples to us.We will quote our best price as soon as possible.