Customized Industrial Ceramic Alumina Ceramic Rods

Overview of Alumina Ceramic Rod

The main component of an alumina ceramic rod is alumina (Al2O3), which has the characteristics of high hardness (second only to diamond), high-temperature resistance, electrical insulation and corrosion resistance. Alumina ceramic rods can be mainly used as mechanical seals, high-temperature furnace components and electronic and electrical insulation components. It is mainly made of alumina powder through molding and sintering processes and is widely used in many industrial fields such as machinery, electronics, chemicals, aerospace, etc. Alumina threaded rod is a rod-shaped material made of ceramic material with alumina (Al2O3) as the main component, and has similar properties and applications to alumina ceramic rods.

Features of Alumina Ceramic Rod

In terms of mechanical properties, alumina ceramic rods have a high hardness, second only to diamond, which makes them excellent in wear resistance, able to withstand large friction and maintain the stability of their structure, and not prone to wear. At the same time, alumina ceramic rods also have high strength, good indicators such as flexural strength, can maintain the stability of shape and performance under certain pressure and external force, and are not prone to damage such as breakage. The Mohs hardness of alumina threaded rods can reach level 9, second only to diamond, which can significantly increase product life and reduce equipment maintenance costs.

From the perspective of thermal performance, alumina ceramic rods have good high-temperature resistance and can work stably in a high-temperature environment. They will not show a significant drop in performance or structural damage due to high temperature. They have strong thermal stability and can adapt to temperature changes. Alumina threaded rods can withstand temperatures up to 1650°C and are suitable for high-temperature industrial kilns and glass manufacturing.

In terms of electrical properties, alumina ceramic rods have excellent electrical insulation, which can effectively prevent the passage of current and ensure the safety of use. They can be used as good insulating materials in the fields of electronics and electrical engineering. In addition, alumina ceramic rods also have certain dielectric properties, which have certain blocking and reflection effects on electromagnetic waves. In addition, alumina threaded rods have excellent electrical insulation and are ideal materials for insulating parts in the field of electronics and electrical engineering.

In terms of chemical properties, alumina ceramic rods have strong corrosion resistance, can resist the erosion of various chemical substances, such as acids and alkalis, and can maintain good performance in scenes with more complex chemical environments. In corrosive environments such as chemical and pharmaceutical industries, alumina threaded rods show extremely strong corrosion resistance and can be used to manufacture acid-resistant pump impellers, pipe linings, etc.

In terms of optical properties, alumina ceramic rods have good light transmittance and can be used in some fields that have certain requirements for optical properties.

Specifications table of Alumina Ceramic Rod

Parameter	Details
Material	High-purity alumina (Al₂O₃) with typical content ≥99.5%
Form	Solid rod
Dimensions	– Diameter: Available in standard sizes (e.g., 5 mm, 10 mm, 15 mm, etc.)<br>- Length: Customizable (e.g., 50 mm to 500 mm)
Tolerance	±0.1 mm for diameter; ±1 mm for length
Hardness	Vickers hardness ≥1800 HV
Density	3.95 g/cm³
Flexural Strength	≥350 MPa
Compressive Strength	≥2000 MPa
Fracture Toughness	3.5 – 4.5 MPa·m½
Thermal Properties	– Thermal Conductivity: 20 – 30 W/m·K<br>- Coefficient of Thermal Expansion: 8.0 x 10⁻⁶ /K (20 – 1000°C)
Electrical Properties	– Volume Resistivity: >10¹⁴ Ω·cm<br>- Dielectric Constant: 10 – 11 (1 MHz)
Chemical Resistance	– Excellent resistance to acids and alkalis<br>- Stable in most chemical environments
Surface Finish	– Standard: Polished to ≤0.5 µm roughness<br>- Custom options available (e.g., grinding, etching)
Color	White or near-white
Applications	– Mechanical seals<br>- Wear-resistant components<br>- Electrical insulators<br>- High-temperature fixtures<br>- Chemical processing equipment
Packaging	– Individual rods wrapped in protective film<br>- Shipped in sturdy cartons to prevent damage
Customization	– Available in custom sizes, shapes, and surface treatments upon request

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Applications of Alumina Ceramic Rod

In the industrial field, alumina ceramic rods can be used to manufacture various wear-resistant parts, such as bearings, bushings, seals, etc., to improve the operating efficiency and reliability of mechanical equipment; in the chemical industry, alumina ceramic rods can also be used to make reactor linings, agitators, etc. to resist the corrosion of chemical substances; in the automotive manufacturing field, alumina ceramic rods can be used in engine parts, such as turbocharger rotors, etc., to improve the performance and efficiency of the engine. Alumina threaded rods are used to manufacture high-load mechanical parts, such as bearings, bushings, etc.

In the field of electronics, alumina ceramic rods have become ideal materials for electronics due to their good electrical insulation and thermal stability. Alumina ceramic rods can be used to manufacture packaging shells for electronic components to protect internal chips from the influence of the external environment; in circuit boards, alumina ceramic rods can be used as substrate materials to provide stable electrical connections and mechanical support; in addition, in some high-frequency electronic devices, alumina ceramic rods can also be used to make resonators, filters and other components to improve the signal processing capabilities of the equipment. Alumina threaded rods can be used as insulating connectors to prevent electrical failures.

In the medical field, alumina ceramic rods can be used to manufacture medical devices such as artificial joints and dental implants because of their good biocompatibility, non-toxicity and non-irritation. These ceramic products not only have good mechanical properties and can withstand the physiological load of the human body but also will not cause the body’s immune response, providing patients with a safer and more reliable treatment option. Alumina threaded rods can be used to manufacture medical devices such as artificial joints.

In addition, alumina ceramic rods can also be used in the aerospace field, and can be used to manufacture aircraft engine parts, thermal protection systems for spacecraft, etc. In the field of environmental protection, alumina ceramic rods can be used as filter components in sewage treatment equipment, using their high hardness and corrosion resistance to filter impurities in sewage effectively; in daily life, some high-end kitchen knives also use alumina ceramic materials, which are much sharper and more wear-resistant than traditional knives, bringing convenience to people’s lives. Alumina threaded rods can be used to manufacture aircraft engine parts and thermal protection systems for spacecraft.

Company Profile

RBOSCHCO is a trusted global chemical material supplier & manufacturer with over 12 years of experience in providing super high-quality chemicals and Nanomaterials. The company exports to many countries, such as the USA, Canada, Europe, UAE, South Africa, Tanzania, Kenya, Egypt, Nigeria, Cameroon, Uganda, Turkey, Mexico, Azerbaijan, Belgium, Cyprus, Czech Republic, Brazil, Chile, Argentina, Dubai, Japan, Korea, Vietnam, Thailand, Malaysia, Indonesia, Australia, Germany, France, Italy, Portugal etc. As a leading nanotechnology development manufacturer, RBOSCHCO dominates the market. Our professional work team provides perfect solutions to help improve the efficiency of various industries, create value, and easily cope with various challenges. If you are interested, please send an email to sales1@rboschco.com

Payment Term

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

Shipment Term

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

5 FAQs of Alumina Ceramic Rod

Q1:What should be paid attention to during the use of alumina ceramic rods?

When installing alumina ceramic rods, attention should be paid to the matching of size and precision to ensure the accuracy of installation. During use, it should be avoided from drastic temperature changes and external force impact to prevent cracks or damage to the material. At the same time, regular inspections and maintenance should be carried out to detect and deal with potential problems in a timely manner.

Q2:What is the hardness of alumina ceramic rods? Can they be processed?

 Alumina ceramic rods have a very high hardness, second only to diamond. This makes them less susceptible to wear during use but also increases the difficulty of processing them. Usually, professional diamond tools are required for processing.

Q3:What economic benefits can the use of alumina ceramic rods bring?

In some high-wear, high-corrosion or high-temperature working conditions, the use of alumina ceramic rods can significantly increase the service life of the equipment, reduce the frequency of maintenance and replacement, and thus reduce the operating cost of the equipment. In addition, its good electrical insulation and high-temperature resistance also help to improve the operating efficiency and safety of the equipment, further bringing economic benefits.

Q4:What factors affect the price of alumina ceramic rods?

 The price of alumina ceramic rods is mainly affected by factors such as raw material costs, production processes, product specifications and performance requirements. Generally speaking, the price of high-purity, high-performance alumina ceramic rods is relatively high.

Q5:How are alumina ceramic rods made?

The production of ceramic rods mainly includes the following steps:

The first is powder preparation, which involves ultra-fine grinding of high-density powders, uniform distribution, and adding diluents and plasticizers according to different molding process requirements to improve the molding properties of the powders.

Then comes the molding process. Common molding methods include dry pressing, injection molding, isostatic pressing, etc. Dry pressing is suitable for ceramic rods with simple shapes and increased sizes; injection molding is suitable for products with complex shapes; isostatic pressing can make the blanks evenly compressed in all directions, dense and with excellent performance.

The next step is the drying process. The formed blanks need to be dried in a controlled environment, such as a drying oven, to remove moisture and solvents to prevent cracking or warping during subsequent evaporation.

The last step is the sintering step, where the dried green body is placed in a high-temperature furnace and sintered at a high temperature of 1600°C to 1800°C to allow atomic diffusion and bonding to occur between the alumina powder particles, thereby increasing the density and strength, and ultimately forming a dense alumina ceramic rod.