Overview of Silicon Nitride

Silicon Nitride (Si₃N₄) is a critical ceramic material renowned for its exceptional mechanical properties, high-temperature resistance, and chemical stability. It is widely used in the fabrication of high-temperature structural components, bearings, cutting tools, and electronic devices. Silicon Nitride can be prepared through methods such as reaction sintering or hot pressing, resulting in two crystalline forms: α-Si₃N₄ and β-Si₃N₄, depending on the production process.

Features of Silicon Nitride

High Hardness and Wear Resistance: Silicon Nitride boasts remarkable hardness and wear resistance, making it ideal for high-performance cutting tools.

Thermal Stability: It maintains excellent mechanical properties at extremely high temperatures, with a maximum usage temperature exceeding 1200°C.

Good Chemical Stability: It shows great resistance to corrosion by most molten metals and acid-base solutions.

Low Density: Compared to metal materials, Silicon Nitride has a lower density, beneficial for reducing the weight of structural components.

Excellent Electrical Insulation Properties: It is a preferred choice for electronic packaging materials.

(High purity si3n4 products silicon nitride powder for ceramic refractory smelting)

Specification of High purity si3n4 products silicon nitride powder for ceramic refractory smelting

High purity silicon nitride (Si3N4) powder is a premium-grade ceramic material designed for demanding applications in ceramic refractory smelting, high-temperature commercial processes, and advanced engineering porcelains. This product is manufactured with advanced nitridation or carbothermal decrease approaches, making certain phenomenal chemical security, thermal resistance, and mechanical toughness.

** Specs: **.
– ** Pureness: ** ≥ 99.9% Si3N4, with trace contaminations (Fe, Al, Ca, and so on) controlled listed below 0.1% to enhance performance in extreme settings.
– ** Phase Structure: ** Mainly α-phase (≥ 90%) for exceptional sinterability, with optional β-phase adjustments for customized thermal shock resistance.
– ** Particle Size: ** Customizable distributions varying from submicron (0.5– 1.0 µm) to nanoscale (50– 200 nm), maximized for dense ceramic creating and uniform refractory coatings.
– ** Thickness: ** 3.1– 3.3 g/cm ³ (academic), guaranteeing light-weight yet durable refractory options.
– ** Thermal Characteristics: ** Melting point > 1900 ° C; thermal conductivity 20– 30 W/m · K (room temperature level); low thermal growth (3.2 × 10 ⁻⁶/ ° C )for stability under rapid temperature level fluctuations.
– ** Oxidation Resistance: ** Secure in oxidizing atmospheres up to 1200 ° C and inert atmospheres as much as 1800 ° C. ** Applications: **.
– ** Refractory Elements: ** Linings for furnaces, ladles, and crucibles in steel smelting (iron, aluminum, copper), offering corrosion resistance against molten steels and slags.
– ** Advanced Ceramics: ** Sintered parts like cutting devices, bearings, and turbine elements needing high wear resistance and thermal endurance.
– ** Compound Products: ** Reinforcement additive for metal or polymer matrices to enhance hardness and thermal shock resistance.

** Handling Standards: **.
– Sintering at 1600– 1800 ° C in nitrogen atmospheres returns > 99% dense ceramics. Suitable with hot pressing, trigger plasma sintering (SPS), or shot molding.
– ** Security: ** Non-toxic yet calls for dealing with in low-dust problems; use PPE to avoid breathing.

** Packaging: ** Vacuum-sealed, moisture-proof bags (1 kg, 5 kg, 25 kg) or bulk containers. Custom-made packaging offered.

** Conformity: ** Meets ISO 20507, ASTM C863, and RoHS requirements.

High-purity Si3N4 powder ensures dependability in extreme thermal and mechanical problems, boosting the effectiveness and longevity of refractory and ceramic systems. Perfect for industries prioritizing precision, longevity, and high-temperature performance.

(High purity si3n4 products silicon nitride powder for ceramic refractory smelting)

Applications of High purity si3n4 products silicon nitride powder for ceramic refractory smelting

High purity silicon nitride (Si3N4) powder is an essential material in sophisticated ceramic refractory applications, particularly in high-temperature smelting procedures. Its outstanding thermal stability, mechanical stamina, and resistance to thermal shock and rust make it suitable for requiring industrial atmospheres. In smelting operations, Si3N4-based porcelains are made use of to produce crucibles, cellular linings, and components that hold up against liquified metals, slag, and severe temperature levels exceeding 1,500 ° C. The material’s low thermal development coefficient reduces cracking under quick temperature fluctuations, ensuring resilience in heating system linings and thermocouple sheaths.

In refractory porcelains, Si3N4 enhances the efficiency of kiln furnishings, such as setters and saggers, by offering premium resistance to oxidation and chemical attack from aggressive melts like light weight aluminum, copper, or steel. Its non-wettability with liquified steels lowers contamination, improving item purity in accuracy casting. Additionally, silicon nitride’s high crack toughness and put on resistance expand the life span of smelting devices, minimizing downtime and maintenance costs.

For smelting applications entailing reactive or corrosive settings, Si3N4 acts as a barrier layer in composite refractories, preventing disintegration and thermal destruction. Its protecting properties likewise add to power performance by keeping constant furnace temperatures. In non-ferrous steel handling, silicon nitride components make certain trusted efficiency in ladles, tundishes, and pouring systems, also under cyclic heating and cooling.

The high purity of Si3N4 powder (normally ≥ 99.9%) is vital for lessening contaminations that could jeopardize refractory stability. This purity guarantees steady sintering behavior, leading to dense, defect-free ceramic structures with ideal thermal and mechanical homes. Industries such as steelmaking, factories, and glass production rely upon Si3N4-based refractories to achieve high efficiency, lowered material waste, and enhanced security in severe operating conditions. By integrating silicon nitride right into refractory systems, producers attain longer-lasting, high-performance solutions tailored for the extensive needs of contemporary smelting and metallurgical procedures.

Company Introduction

Welcome to JatujakGuide,a leading global supplier of high-quality silicon nitride (Si₃N₄) products. We specialize in providing advanced ceramic materials that offer exceptional strength, thermal stability, and wear resistance, making them ideal for industries such as aerospace, automotive, and electronics. Our state-of-the-art manufacturing processes ensure superior product quality and consistency. With a commitment to innovation and customer satisfaction, we deliver reliable and cost-effective solutions worldwide. Whether you need silicon nitride for cutting tools, bearings, or thermal management applications, trust [Your Company Name] to meet your needs. Partner with us for high-performance materials and expert support.

If you have any questions, please feel free to contact us(nanotrun@yahoo.com).

Payment Methods

T/T, Western Union, Paypal, Credit Card etc.

Shipment Methods

By air, by sea, by express, as customers request.

5 FAQs of High purity si3n4 products silicon nitride powder for ceramic refractory smelting

**What is high-purity silicon nitride (Si3N4) powder?**
High-purity silicon nitride powder is a ceramic material composed of silicon and nitrogen, synthesized under controlled conditions to achieve minimal impurities (typically ≥99.9%). It exhibits exceptional thermal stability (up to 1800°C in inert environments), high mechanical strength, corrosion resistance, and low thermal expansion. Its refined particle size and uniform morphology make it ideal for demanding applications like advanced refractories and high-performance ceramics.

**Why is silicon nitride powder used in ceramic refractory smelting?**
Silicon nitride’s extreme heat resistance, thermal shock tolerance, and chemical inertness make it ideal for refractory linings in smelting furnaces. It withstands molten metals, slag, and corrosive gases while maintaining structural integrity at high temperatures. Its low thermal conductivity also improves energy efficiency by reducing heat loss. These properties extend furnace lifespan and enhance process reliability in harsh smelting environments.

**What purity levels are available for silicon nitride powder?**
High-purity Si3N4 powders are available in grades ranging from 99% to 99.99% purity. Higher purity grades (e.g., 99.9%) minimize contaminants like oxygen, iron, or aluminum, which can degrade performance in critical applications. Ultra-high-purity variants are tailored for advanced ceramics, semiconductor components, or aerospace materials where even trace impurities affect thermal or mechanical properties.

**How is silicon nitride powder processed into ceramics?**
The powder is shaped using techniques like pressing, injection molding, or slip casting, then sintered at high temperatures (1600–1900°C) in nitrogen-rich atmospheres. Advanced methods like hot isostatic pressing (HIP) or reaction-bonded silicon nitride (RBSN) enhance density and strength. Additives like Y2O3 or Al2O3 may be used to promote sintering and refine microstructure for specific mechanical or thermal requirements.

**What are the storage and handling guidelines for silicon nitride powder?**
Store in airtight, moisture-proof containers to prevent oxidation or hydrolysis. Avoid exposure to humid environments, as moisture can form ammonia and silica, altering composition. Handle using non-reactive tools (e.g., stainless steel or plastic) to avoid contamination. Use PPE like N95 masks and gloves to minimize inhalation or skin contact. Keep away from acids or strong alkalis to maintain chemical stability.

(High purity si3n4 products silicon nitride powder for ceramic refractory smelting)