Aluminum Nitride (AlN) powder is a versatile material known for its exceptional thermal and electrical properties. Its applications span across electronics, metallurgy, and ceramics, making it a critical component in modern technology. This guide provides an in-depth overview of AlN powder, from its composition and characteristics to its various applications and advantages. We’ll also compare different models, explore the pros and cons, and answer frequently asked questions.
Visão geral de Aluminum Nitride Powder
Aluminum Nitride (AlN) is a ceramic material with unique properties that set it apart from other compounds. Known for its high thermal conductivity, excellent electrical insulation, and stability under extreme conditions, AlN powder is indispensable in industries such as semiconductors, aerospace, and energy.
Key Features of AlN Powder
- High Thermal Conductivity: Efficient heat dissipation.
- Electrical Insulation: Ideal for electronic devices.
- Chemical Stability: Resistant to corrosion and oxidation.
- Wide Bandgap: Suitable for high-power electronic applications.
| Propriedade | Valor |
|---|---|
| Condutividade térmica | 170-200 W/mK |
| Resistividade elétrica | >10ⁱ⁰ Ω·cm |
| Ponto de fusão | 2,200°C |
| Densidade | 3.26 g/cm³ |
| Crystal Structure | Wurtzite |
Types and Models of AlN Powder
There are various models of AlN powder tailored for specific applications. Below is a list of popular models with descriptions:
- Grade A-100: High-purity powder with low oxygen content, ideal for high-performance electronic substrates.
- ThermaAlN-150: Designed for applications requiring superior thermal conductivity.
- NanoAlN-50: Nano-sized particles for advanced coatings and composites.
- EcoAlN-200: Environmentally friendly option with sustainable production methods.
- UltraFine-300: Ultra-fine powder for precision applications in semiconductors.
- AlN-XTreme: Enhanced toughness for structural ceramics.
- SuperPure-500: Ultra-high purity for research and specialized uses.
- IndustrialAlN-700: Cost-effective option for bulk applications in general industries.
- PowderFlex-400: Flexible grain sizes for diverse applications.
- HeatSinkAlN-800: Specifically engineered for heat sink and thermal management applications.
| Nome do modelo | Key Feature | Primary Application |
| Grade A-100 | High purity, low oxygen | Electronic substrates |
| ThermaAlN-150 | Superior thermal conductivity | Heat dissipation |
| NanoAlN-50 | Nano-sized particles | Coatings, composites |
| EcoAlN-200 | Sustainable production | General industrial use |
| UltraFine-300 | Ultra-fine grain | Precision electronics |
| AlN-XTreme | Enhanced toughness | Structural ceramics |
| SuperPure-500 | Pureza ultra-alta | Research, specialized electronics |
| IndustrialAlN-700 | Custo-benefício | Bulk industrial applications |
| PowderFlex-400 | Versatile grain sizes | Diversas aplicações |
| HeatSinkAlN-800 | Optimized for heat sinks | Thermal management |
Composition of AlN Powder
Aluminum Nitride powder is primarily composed of aluminum (Al) and nitrogen (N). The composition often includes trace impurities such as oxygen or carbon, depending on the production process.
| Elemento | Porcentagem |
| Alumínio (Al) | 50-55% |
| Nitrogênio (N) | 45-50% |
| Oxigênio (O) | <0,5% |
| Carbono (C) | <0,2% |
Manufacturers achieve high purity through processes such as carbothermal reduction or direct nitridation.
Characteristics of AlN Powder
Propriedades físicas
- Densidade: 3.26 g/cm³
- Color: Light gray or off-white
- Tamanho da partícula: Ranges from nanometers to micrometers
Propriedades térmicas
- Thermal Expansion Coefficient: 4.3 × 10⁻⁶ /°C
- Condutividade térmica: 170-200 W/mK
Electrical Properties
- Dielectric Constant: 8.6 at 1 MHz
- Resistividade elétrica: >10ⁱ⁰ Ω·cm
Propriedades quimicas
- Chemically inert under most conditions
- Resistant to corrosion and oxidation
| Propriedade | Descrição |
| Densidade | 3.26 g/cm³ |
| Expansão térmica | Low, ideal for stable structures |
| Estabilidade química | High resistance to oxidation |
| Resistividade elétrica | Excellent insulation properties |
Applications of AlN Powder
Aluminum Nitride powder is widely used in various industries. Here are some of its prominent applications:
| Setor | Aplicativo |
| Eletrônicos | Substrates, heat sinks, thermal interface materials |
| Cerâmica | Structural components, high-temperature coatings |
| Aeroespacial | Thermal management systems |
| Energia | LED technology, photovoltaic systems |
| Metalurgia | Crucibles, metal refining aids |
| Dispositivos médicos | Bio-compatible ceramics |
Especificações, tamanhos, classes e padrões
AlN powder comes in various sizes and grades to suit different applications. Below is a detailed comparison:
| Especificação | Range/Value |
| Tamanho da partícula | 0.1-10 micrometers |
| Nível de pureza | 95%-99.99% |
| Condutividade térmica | 170-200 W/mK |
| Conteúdo de oxigênio | <0,5% |
| Padrões | ASTM C1685, ISO 9001 |
Fornecedores e preços
AlN powder is available from various global suppliers. Pricing depends on purity, particle size, and order quantity.
| Fornecedor | Produto | Preço (USD/kg) | MOQ |
| Materion | Grade A-100 | $150-$200 | 1 kg |
| Advanced Ceramics | ThermaAlN-150 | $180-$250 | 5 kg |
| NanoMaterials Inc. | NanoAlN-50 | $300-$400 | 1 kg |
| GreenTech Materials | EcoAlN-200 | $120-$170 | 10 kg |
Advantages and Limitations of AlN Powder
Vantagens
- High thermal conductivity for efficient heat dissipation.
- Excellent electrical insulation properties.
- Chemically stable and resistant to oxidation.
Limitações
- Relatively high production costs.
- Brittle nature limits mechanical applications.
- Susceptibility to hydrolysis under specific conditions.
| Aspecto | Vantagens | Limitações |
| Condutividade térmica | Alta | None |
| Electrical Properties | Excellent insulation | Not conductive |
| Custo | High-end applications justify cost | Expensive for general use |
Perguntas frequentes
| Pergunta | Resposta |
| What is AlN powder used for? | It’s used in electronics, ceramics, aerospace, energy, and medical industries. |
| Why is AlN powder expensive? | The high cost is due to complex production processes and high purity levels. |
| How is AlN powder produced? | It’s typically made through carbothermal reduction or direct nitridation. |
| Can AlN powder conduct electricity? | No, it’s an excellent electrical insulator. |
| Is AlN environmentally friendly? | Yes, especially eco-friendly grades like EcoAlN-200. |
This comprehensive guide covers everything you need to know about Aluminum Nitride powder. Whether you’re selecting the right model for a specific application or comparing properties and costs, this article ensures you’re well-informed. Got questions? Dive into the FAQ or reach out to your supplier for expert advice!