Silicon nitride is a compound of silicon and nitrogen. Si3n4 is the most thermodynamic stable in silicon nitride. It is white, high melting point solid, relative chemical inert, diluted HF and hot H2SO4 attack. It works very hard (8.5 on the MoHS), which has high thermal stability. By the way, silicon nitride cost is also cheap.
Silicon nitride powder is an inorganic substance, and the chemical formula is Si3N4. It is an important structural ceramic material with high hardness, which has lubricity and wear resistance, an atomic crystal; antioxidation at high temperatures. Moreover, it can resist the impact of the cold and cold, heated into the air to 1000 ° C or more, and the sharp cooling and then heating, and it will not be broken. It is precise because silicon nitride ceramics have such excellent properties, and people often utilize them to make mechanical components such as bearings, air turbine blades, mechanical seals, permanent molds. If silicon nitride ceramics resistant to high temperatures and are not easily transferred, the heat-inspiration surface of the engine member can be improved, not only the quality, but also saves fuel, but also improves thermal efficiency.
Silicon nitride is difficult to produce as a bulk material—it cannot be heated over 1850 °C, which is well below its melting point, due to dissociation to silicon and nitrogen. Therefore, the application of conventional hot press sintering techniques is problematic. Bonding of silicon nitride powders can be achieved at lower temperatures through adding additional materials (sintering aids or "binders") which commonly induce a degree of liquid phase sintering. A cleaner alternative is to use spark plasma sintering where heating is conducted very rapidly (seconds) by passing pulses of electric current through the compacted powder. Dense silicon nitride compacts have been obtained by this technique at temperatures 1500–1700 °C. Feel free to send an inquiry to get the latest price if you would like to buy Silicon Nitride Si3N4 Powder in bulk.
Product Characteristics of Silicon Nitride
Low density
High-temperature strength
Superior thermal shock resistance
Excellent wear resistance
Good fracture toughness
Mechanical fatigue and creep resistance
Good oxidation resistance
Specification of Silicon Nitride
Product Name: Silicon Nitride
Purity: 99%
Particle Size: 0.5um-1um (α phase)
Chemical Composition of Silicon Nitride
Si3N4 | N | O | C | Fe | Al | Ni | Zn |
＞99% | ＞38.9% | 0.6-1.2 | ＜0.2 | ＜120ppm | ＜3ppm | ＜1ppm | ＜1ppm |
The hexagonal β-Si3N4 can directly carry out silicon nitride and nitrogen can be carried out in a 100-1400 ° C.
SiCL4 (L) + 6 NH3 (g) → Si (NH) 2 (S) + 4 NH4Cl (S) under conditions of 0 ° C
3 Si (NH) 2 (S) → Si3N4 (S) + N2 (g) + 3 H2 (g) under the conditions of 1000 ° C
Or use a carbon thermal reduction reaction in a nitrogen atmosphere of 1400-1450 ° C under a nitrogen atmosphere:
3 SiO2 (S) + 6 C (S) + 2 N2 (g) → Si3N4 (S) + 6 CO (g)
However, if the purity of silicon raw materials used will cause silicon nitride produced containing impurity silicate and iron. The silicon nitride synthesized by diamine decomposing is an amorphous shape, and it is necessary to further do an annealing treatment in nitrogen at 1400-1500 ° C to convert it into crystalline powder, and diamine decomposition is only important. Commercially in nitriding method to produce silicon nitride. The carbon-thermal reduction reaction is the simplest way to produce silicon nitride is also the most cost-effective means of manufacturing a silicon powder in industrial.
The electron-level silicon nitride film is made by chemical vapor deposition or plasma enhanced chemical vapor deposition techniques:
3 SiH4 (G) + 4 NH3 (g) → Si3N4 (S) + 12 H2 (g)
3 SiCL4 (G) + 4 NH3 (g) → Si3N4 (S) + 12 HCl (g)
3 SiCL2H2 (G) + 4 NH3 (g) → Si3N4 (S) + 6 HCl (g) + 6 H2 (g)
If you want to deposit silicon nitride on the semiconductor substrate, there are two methods available for use:
The vertical or horizontal tube furnace is performed at a relatively high temperature using low-pressure chemical vapor deposition techniques.
Plasma enhanced chemical vapor deposition techniques are carried out at a relatively low temperature in vacuum conditions.
The cell parameters of silicon nitride are different from single textile silicon. Therefore, depending on the deposition method, the generated silicon nitride film will generate tension or stress. In particular, when using plasma-enhanced chemical vapor deposition techniques, tension can be reduced by adjusting deposition parameters.
The silica was prepared by soluble gel, and then the silicon nanowires were treated with silica gel thereby in which carbon-thermal reduction method and nitride were treated. The special carbon particles in silica gel are produced by glucose at 1200-1350 ° C.
Hexagonal boron nitride is white (clean appearance), non-toxic and non-conductive. It is an excellent substitute for other commonly used lubricants in metal processing (such as graphite, molybdenum disulfide, organic wax and oil). In most cases, boron nitride can greatly improve the efficiency of these applications.
Manufacturing structure: such as metallurgy, machinery, aviation, aerospace.
Surface treatment of metals and other materials: such as molds, cutting tools, turbine blades.
Composites: such as metal, ceramic and graphite composite, rubber, plastic
Colorless, transparent self-lubricating wear nanoparticle membrane for mobile phones;
Advanced surface protection such as a car;
Jack joint;
Ball valve and part;
Corrosion-resistant turbine;
Metallurgical, aviation, chemical, energy and machinery industry make parts such as bead/roller bearings, sleeves, valves and other wear;
Making cutting tools, molds, cylindrical wall coating, turbine rotors and blades;
Manufacturing composite materials such as ceramic, graphite, rubber, metal, adhesive, etc.
Nozzle, rocket and missile spray pipe.
Tongrun Nano Technology Co. Ltd. (TRUNNANO) is a trusted global chemical material supplier & manufacturer with over 12 years of experience in providing super high-quality chemicals and nanomaterials, including boride powder, nitride powder, graphite powder, sulfide powder, 3D printing powder, etc.
The company has professional technical and quality supervision departments, a well-equipped laboratory with advanced testing equipment, and an after-sales customer service center.
If you are looking for high-quality Silicon Nitride, please get in touch with us or click on the needed products to send an inquiry.
We have many different kinds of packing which depends on the silicon nitride Si3N4 powder quantity.
Silicon nitride Si3N4 powder packing: vacuum packing, 100g, 500g or 1kg/bag, 25kg/barrel, or as your request.
Silicon nitride Si3N4 powder shipping: could be shipped out by sea , by air, by express as soon as possible once payment receipt.
L/C, T/T, Western Union, Paypal, Credit Card etc.
Q1
How does the purity of silicon nitride powder affect its performance?
Answer: The purity of silicon nitride powder has an important impact on its performance. High-purity silicon nitride powder has better physical and chemical properties, such as higher hardness, strength, wear resistance and thermal stability. Therefore, the raw material quality and preparation process need to be strictly controlled during the production process to obtain high-purity silicon nitride powder..
Q2
What is the price of silicon nitride powder?
Answer: The price of silicon nitride powder is relatively high, mainly due to its complex production process, high raw material cost and wide range of applications. Prices are also affected by factors such as market supply and demand, product quality and purity.
Q3
What should you pay attention to when using silicon nitride powder?
Answer: When using silicon nitride powder, care needs to be taken to avoid contact with moist environments to prevent the powder from clumping. At the same time, attention needs to be paid to controlling the temperature and atmosphere during the preparation process to obtain high-quality silicon nitride powder. In addition, silicon nitride powder may produce dust during use, and dust prevention measures need to be taken to protect the health of operators.
Q4
What is the development trend of silicon nitride powder?
Answer: With the continuous development of ceramic materials, refractory materials, abrasives and other fields, the demand for silicon nitride powder will continue to grow. At the same time, with the continuous improvement of the preparation process and the improvement of purification technology, the performance and purity of silicon nitride powder will also be further improved. In the future, silicon nitride powder is expected to be used in more fields and promote the development of related industries.
Q5
What are the advantages of silicon nitride powder compared to other ceramic materials?
Answer: Compared with other ceramic materials, silicon nitride powder has higher hardness, strength and wear resistance, as well as better thermal shock resistance and chemical stability. In addition, silicon nitride powder also has high thermal conductivity and low thermal expansion coefficient, giving it better performance in high temperature environments. These advantages make silicon nitride powder have broad application prospects in the field of ceramic materials.
Silicon nitride is known as Si3N4 powder, it's a super-hard substance, which has lubricity itself, and is resistant to wear and oxidation at high temperatures. Purity: 99% Particle Size: 0.5um-1um
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