Alumina Precision Ceramics High-Performance Materials For Demanding Applications In Electronics Industry And Medicine
Introduction
High-temperature, high-pressure, and corrosion-resistant alumina ceramic is a specialized advanced ceramic material primarily made from high-purity alumina (Al₂O₃). It is manufactured using advanced powder metallurgy techniques and ultra-high temperature sintering processes. This material excels in extreme industrial environments due to its exceptional hardness, remarkable wear resistance, outstanding chemical inertness, and excellent thermal stability. It is specifically engineered to ensure production safety, extend equipment service life, and reduce overall operational costs in the most demanding conditions.
Applications
This product is designed for use in industries where multiple harsh conditions such as high temperature, high pressure, severe abrasion, and strong corrosion are present:
-
Petrochemical Industry: High-temperature oil and gas valve seals, mechanical seal rings for pumps, reactor linings, catalyst supports.
-
Mechanical Seals: Seal rings and faces for reactors and pumps handling hazardous media (acids, alkalis, solvents) to prevent leaks.
-
Industrial Kilns & Furnaces: High-temperature furnace linings, thermocouple protection tubes, roller hearth kiln rollers, burner nozzles.
-
Aerospace: Used as high-temperature insulation components, sensor housings.
-
Nuclear Industry: Specific components requiring radiation and corrosion resistance.
Advantages
-
Exceptional High-Temperature Resistance: Can operate stably at temperatures up to 1600°C or higher long-term, without softening or oxidizing, and offers excellent thermal shock resistance.
-
Ultra-High Pressure Resistance: Possesses extremely high compressive strength (>2000 MPa), capable of withstanding extreme system pressures without deformation or bursting.
-
Superior Corrosion Resistance: Offers excellent resistance to most strong acids (e.g., hydrochloric, sulfuric), alkalis, and organic solvents, far outperforming metals like stainless steel or special alloys in terms of lifespan.
-
Excellent Wear Resistance: Second only to diamond in hardness, it effectively resists high-speed scouring by solid particles and cavitation erosion.
-
Good Insulation Properties: Maintains excellent electrical insulation even at high temperatures, ensuring operational safety.
Specifications Table
| Parameter | Typical Indicators / Specifications |
| Main Composition | Al₂O₃ |
| Alumina Content | 99% / 99.5% / 99.7% |
| Density | ≥ 3.85 g/cm³ |
| Compressive Strength | ≥ 2000 MPa |
| Flexural Strength | ≥ 300 MPa |
| Vickers Hardness (HV0.5) | ≥ 1600 |
| Maximum Service Temperature | 1650 °C (short-term up to 1800°C) |
| Coefficient of Thermal Expansion | 7.0 - 8.0 × 10⁻⁶/°C (20-1000°C) |
| Corrosion Resistance | Resists most acids and alkalis |
Manufacturing Process
High-purity ultra-fine alumina powder → Precise formulation → Spray granulation → Dry pressing/Isostatic pressing → Precision machining (green state) → Ultra-high temperature sintering (>1750°C) → Precision grinding with diamond grinding wheels → Non-destructive testing → Comprehensive inspection → Packaging.
Usage Instructions
-
Pre-Installation: Handle with care; avoid any mechanical impact. Clean the installation area to ensure it is free of hard particles.
-
During Installation: Ensure force is applied evenly. Avoid point impact or excessive preload force. For sealing applications, use specialized tools and torque wrenches.
-
Operation: Avoid sudden and severe temperature changes (thermal shock). Heating and cooling processes should be gradual.
-
Maintenance: Regularly inspect ceramic components for cracks or signs of severe wear and replace them promptly.
After-Sales Service
We provide professional technical selection support and comprehensive after-sales service. The product warranty period is 12 months, with lifelong technical consultation available. We承诺 (commit to) free repair or replacement for issues caused by material or manufacturing defects. Custom non-standard sizes are supported, and detailed installation manuals are provided.
FAQ
Q1: How does it differ from standard 95% alumina ceramic?
A1: The main differences lie in purity, performance, and cost. High-purity alumina (99%+) offers far superior high-temperature performance, corrosion resistance, hardness, and strength compared to 95% alumina. However, it also comes with higher costs and manufacturing complexity, making it suitable for the most extreme conditions.
Q2: How much pressure can it withstand?
A2: Its compressive strength is extremely high. The actual pressure-bearing capacity depends on the specific design of the component (e.g., thickness, shape). With proper design, it can withstand static pressures of several hundred Megapascals (MPa).
Q3: Is it prone to cracking under thermal shock?
A3: Compared to metals, ceramics are more sensitive to thermal shock. However, we have improved its thermal shock resistance by optimizing the microstructure and sintering process. It is advisable to avoid rapid temperature changes in system design. If frequent thermal cycling is required, please inform us in advance for material selection tailored to this need.
Product Tags:
|
|
Alumina Precision Ceramics High-Performance Materials For Demanding Applications In Electronics Industry And Medicine Images
|
