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Silicon Nitride (Si3N4) Powder is a...
HMNP-1674
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Silicon Nitride (Si3N4) Powder is a grey powder. Moh's hardness is 8.5. It has excellent thermal stability, thermal shock resistance, and high resistivity, and can only be corroded by dilute hydrofluoric acid and hot sulfuric acid. There are other structural compositions of silicon nitride such as Si2N, SiN, and Si2N3, which are sub-stable phases.
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Purity | 97.00% - 99.999% |
CAS | 12033-89-5 |
Molecular Formula | Si3N4 |
Silicon Nitride (Si3N4) Powder is a grey powder. Moh's hardness is 8.5. HM provides high-quality Silicon Nitride (Si3N4) Powder at a competitive price, which is an important structural ceramic material. It is a super-hard substance, inherently lubricious and resistant to wear and tear, and is an atomic crystal; it resists oxidation at high temperatures. It is also resistant to hot and cold shocks, and will not shatter when heated in air to over 1000 °C, sharply cooled, and then sharply heated.
Product | Phase Ratio | Purity (%) | Particle D50 (μm) | Element content (%) | Impurity (ppm) | |||||
N | O | C | Si free | Fe | Al | Ca | ||||
SiN | β>50% | 99.999 | <2.5 | >38.5 | <0.8 | <0.15 | <0.3 | <5 | <3 | <3 |
SiN | β>50% | 99.999 | <0.8 | >38.0 | <2.0 | <0.2 | <1.2 | <30 | <20 | <20 |
SiN | α>70% | 99.95 | <0.8 | >38.5 | <1.0 | <0.2 | <0.5 | <50 | <200 | <50 |
SiN | α>92% | 99.50 | <2.5 | >38.5 | <2.5 | <0.2 | <0.5 | <2000 | <2000 | <500 |
SiN | α>95% | 99.00 | <5.0 | >38.0 | <2.0 | <0.2 | <0.5 | <4000 | <4000 | <1000 |
SiN | Amorphous | 97.00 | <50nm | >38.0 | <0.2 | <0.05 | N/A | <600 | <5 | <5 |
Silicon nitride is divided into α, β, and three crystal types.
Silicon nitride (Si3N4) can be produced as a powder or as a film. The main methods are direct nitridation of silicon, the reaction of SiCl4 and NH3, carbothermal reduction of SiO2, and CVD. These versatile methods yield Si3N4 with high hardness, melting point, and chemical resistance for many applications.
Silicon nitride powder has various applications due to its high-temperature resistance, high strength, and good thermal shock resistance. Adding fluxes lowers the sintering temperature of silicon nitride ceramics to 1500-1700°C using discharge plasma sintering. Although silicon nitride ceramics have excellent properties, their high cost limits market share. Reducing costs will expand their applications.
Silicon Nitride (Si3N4) Powder should be kept sealed and stored in a cool and dry place. The vacuum packing is 100g/bag, 1kg/bag, 25 kg/drum, or as required.
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