Aluminum Oxide

Overview of Aluminum Oxide Ceramic Products

Aluminum oxide (Al₂O₃), commonly known as alumina, represents a class of advanced engineering ceramics renowned for their exceptional hardness, high strength, and excellent wear resistance. Alumina ceramics are engineered to deliver superior performance in demanding environments characterized by mechanical stress, abrasive conditions, and corrosive atmospheres. Utilizing high-purity aluminum oxide as the base material, these products offer unparalleled durability and reliability across various industries. Whether used in industrial machinery or cutting-edge electronic applications, alumina ceramics set new standards for performance and efficiency.

Features of Aluminum Oxide Ceramic Products

1. High Hardness: With a Mohs hardness rating of 9, alumina is one of the hardest materials available, second only to diamond.
2. Excellent Wear Resistance: The hardness and density of alumina make it highly resistant to wear and abrasion.
3. High Compressive Strength: Exhibits compressive strengths exceeding 4000 MPa, making it highly resistant to deformation under pressure.
4. Chemical Inertness: Highly resistant to corrosion from acids, alkalis, and organic solvents, ensuring long-lasting performance in harsh environments.
5. Thermal Stability: Can withstand continuous service temperatures up to 1700°C, making it suitable for high-temperature applications.
6. Low Thermal Expansion: Low coefficient of thermal expansion ensures dimensional stability even under rapid temperature changes.
7. Electrical Insulation: Excellent dielectric strength and resistivity make alumina suitable for use in electrical insulation applications.
8. Biocompatibility: Non-toxic and biocompatible, making it ideal for medical and dental applications.
9. Self-Lubricating Properties: Has a low coefficient of friction, reducing the need for additional lubricants in moving parts.

Specifications of Aluminum Oxide Ceramic Products

Property	Specification
Material Composition	High-purity aluminum oxide (Al₂O₃), often with dopants for specific applications
Density	3.95 - 4.02 g/cm³
Hardness (Mohs Scale)	9
Hardness (Vickers)	~1800 - 2200 HV
Fracture Toughness	3.5 - 4.5 MPa·m^(1/2)
Compressive Strength	> 3500 MPa
Tensile Strength	> 300 MPa
Flexural Strength	> 400 MPa
Elastic Modulus	370 - 400 GPa
Thermal Conductivity	20 - 35 W/m·K
Coefficient of Thermal Expansion (CTE)	7.5 - 8.6 × 10⁻⁶/°C
Maximum Service Temperature	Continuous up to 1700°C; intermittent up to 2000°C
Thermal Shock Resistance	ΔT > 500°C (depending on thickness and shape)
Dielectric Strength	> 15 kV/mm
Volume Resistivity	> 10¹⁶ Ω·cm at 25°C
Surface Resistivity	> 10¹⁴ Ω/sq at 25°C
Dielectric Constant (εr)	~9.8 at 1 MHz
Loss Tangent (tan δ)	< 0.0002 at 1 MHz
Chemical Resistance	Excellent resistance to acids, alkalis, and organic solvents
Porosity	< 0.5%
Water Absorption	< 0.1%
Color Options	Natural white; customizable colors through pigmentation
Finish Options	Polished, honed, matte, textured
Environmental Impact	Recyclable, low environmental footprint

Applications of Aluminum Oxide Ceramic Products

• Industrial Abrasives: Ideal for grinding, cutting, and polishing applications where durability and precision are critical.
• Mechanical Engineering: Suitable for wear-resistant components such as nozzles, dies, bearings, and seals.
• Chemical Processing: Used in pump components, valves, and other parts exposed to aggressive chemicals.
• Electronics: Beneficial for substrates, insulators, and packaging materials in electronic devices.
• Medical Devices: Applied in surgical instruments, implants, and dental restorations due to its biocompatibility and durability.
• Automotive Industry: Found in engine components, sensors, and brake systems where high temperatures and mechanical stress are common.
• Aerospace: Used in heat shields, engine components, and structural parts requiring high thermal stability and strength.
• Ceramic Armor: Employed in body armor and vehicle armor due to its high hardness and light weight.

Company Introduction

Advanced Ceramics is committed to being the world's leading provider of ceramic material solutions. Since our inception in 2012, we have focused on the development, production and sales of high-performance ceramic products, providing our customers with innovative products and quality services. With a deep understanding of material science and advanced manufacturing technology, we have won wide recognition in a variety of fields, including electronics, machinery, construction, and medical care.

Our core competitiveness lies in continuous technological innovation and strict quality control. We have an R&D team of senior scientists and engineers who are constantly exploring the application potential of new materials to ensure that our products are always at the forefront of the industry. At the same time, we have established a perfect quality management system, from the selection of raw materials to the finished product factory, each link is strictly tested to ensure the high quality and consistency of our products.

Advanced Ceramics' product line covers a wide range of ceramic applications, including but not limited to: high-precision electronic ceramic components, wear-resistant mechanical parts, decorative building materials, and medical implants. We not only provide standard products, but also customize ceramic products with special specifications and functions according to customers' needs. In addition, we actively promote the concept of green environmental protection, all production processes comply with international environmental standards, and strive to minimize the impact on the environment.

For more information, please feel free to contact us.(nanotrun@yahoo.com)

Payment Methods

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

Shipment Methods

By sea, by air, by express as soon as possible once payment receipt.

5 FAQs of Aluminum Oxide Ceramic Products

1. Q: What makes aluminum oxide ceramics so hard? A: Aluminum oxide's hardness comes from its strong ionic bonding within its crystalline structure, resulting in a material that resists deformation and wear.
2. Q: Can aluminum oxide ceramics be machined after sintering? A: While alumina is very hard, it can be machined using diamond tools. However, machining should be done by professionals familiar with ceramic machining techniques to avoid damage.
3. Q: How does aluminum oxide compare to traditional ceramics in terms of thermal shock resistance? A: Aluminum oxide has moderate thermal shock resistance; while not as high as some ceramics like silicon nitride, it benefits from its low coefficient of thermal expansion and good thermal conductivity.
4. Q: Are aluminum oxide ceramics suitable for high-temperature applications? A: Yes, aluminum oxide can withstand continuous service temperatures up to 1700°C, making it ideal for high-temperature environments, especially in vacuum or inert atmospheres.
5. Q: What maintenance do aluminum oxide ceramic surfaces require? A: Aluminum oxide ceramics are easy to maintain; regular cleaning with mild soap and water is usually sufficient. For tougher stains, non-abrasive cleaners can be used without damaging the surface.