High purity high temperature resistant alumina ceramic ring

Overview of Alumina Ceramic Rings

Alumina ceramic rings are a type of ceramic product with alumina as the main component. Alumina ceramic rings have high hardness, second only to diamond, and are very wear-resistant. They have good chemical stability and can maintain performance in corrosive environments. They have high mechanical strength and can withstand greater pressure and impact.

Alumina ceramic rings are commonly used in electronics, machinery, chemical industry and other fields, such as insulating parts, wear-resistant parts, sealing elements, etc., providing reliable protection for the operation of related equipment and products.

Features of Alumina Ceramic Rings

Alumina ceramic rings have many remarkable features. Alumina ceramic rings are resistant to high temperatures and can maintain stability in high-temperature environments without melting or losing structural stability.

Alumina ceramic rings are highly resistant to corrosion and can resist erosion by a variety of chemicals, including acids and alkalis. Alumina ceramic rings have high hardness, second only to diamond, and have good wear resistance, which can effectively resist wear and scratches. Alumina ceramic rings have high mechanical strength, strong pressure and impact resistance and can maintain a stable shape under vibration and high-pressure environments.

Alumina ceramic rings have excellent insulation properties and high resistivity and are insulators at room temperature, so they can be used in equipment that requires insulation. Alumina ceramic rings have a low thermal expansion coefficient and can adapt to thermal expansion and contraction under high-temperature conditions, reducing stress and damage caused by temperature changes.

In addition, alumina ceramic rings also have good chemical stability and biological inertness, making them suitable for a variety of harsh environments. However, alumina ceramic rings are difficult to process, and their hardness and brittleness make them prone to peeling during processing.

Specifications table of Alumina Ceramic Rings

Specification	Details
Material	Al₂O₃
Purity	85%-99.8%, common specifications include 95%, 99%, 99.7%, etc.
Color	White or ivory
Density (g/cm³)	3.70-3.92
Hardness (Mohs)	9
Hardness (HRA)	85-91
Hardness (HV₁)	13.8-18 GPa
Tensile Strength (Kpsi)	32-38
Flexural Strength (Kpsi)	52-55
Compressive Strength (Kpsi)	300-377
Elastic Modulus (GPa)	330-380
Fracture Toughness (MPa·m¹/²)	3-4.5
Thermal Expansion Coefficient (10⁻⁶/℃)	6.8-7.8
Thermal Conductivity (W/m·K)	25-32
Thermal Shock Stability (ΔT, ℃)	198-220
Max Working Temperature (℃)	1350-1750
Volume Resistivity (25℃, Ω·cm)	≥10¹⁴
Dielectric Strength (KV/mm)	15-22
Dielectric Constant (20℃, 1MHz)	7.6-11.5
Dielectric Loss Factor (tanδ, 1MHz)	1×10⁻³-3×10⁻³

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Applications of Alumina Ceramic Rings

Alumina ceramic rings play an important role in many fields due to their excellent properties. Alumina ceramic rings are widely used in the chemical industry for equipment such as distillation, absorption of liquids and gases, desulfurization systems, and gas-liquid separators. Their corrosion resistance and high-temperature stability make them an ideal material choice.

In the electronics industry, alumina ceramic rings are used as insulating sleeves, electronic ceramic capacitors and other components to provide reliable insulation for electronic equipment. In the mechanical field, alumina ceramic rings are used to manufacture wear-resistant parts such as bearings and sealing rings. Their high hardness and wear resistance can effectively extend the service life of the equipment. In the aerospace field, alumina ceramic rings can be used for sealing and insulating parts of engines and gas turbines to withstand high temperature and high pressure environments to ensure flight safety.

In addition, alumina ceramic rings are also used to manufacture medical devices such as artificial joints. Their good biocompatibility and chemical stability make them ideal medical materials. In the field of environmental protection, alumina ceramic rings are used as efficient filter materials to handle hydrocarbon adsorption processes, remove impurities, and ensure the smooth progress of the production process.

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 Rings

Q1:What are the reasons for the quality problems such as spots, plaques, and color differences on the surface of alumina ceramic rings?

Black, brown, brown and pink spots appear on the surface, and the main impurity components are Fe. The main impurities of pink spots are Fe, Cr, and Ni, which are generally caused by mechanical iron particles mixed into the raw materials and ceramic production process; dark spots (negative spots), black cloud spots and other plaques are mainly caused by ceramic formula, production process and process problems; the overall yellow or gray color difference phenomenon is mainly caused by impurity pollution introduced during the production process.

Q2:How to solve the problems of spots, plaques, color difference on the surface of alumina ceramic rings?

When molding, pay attention to selecting raw materials with good quality and low iron content and perform magnetic separation to remove iron when necessary; pay attention to whether the lining bricks of the ball mill fall off and repair them in time; install magnetic separation to remove iron during slurry transportation, hot air furnace, hot air filtration to prevent rust from entering the material in the hot air system; all conveying pipelines should be lined with polyurethane as much as possible.

Q3:How to use alumina ceramic rings correctly?

When using alumina ceramic rings, avoid rapid temperature changes and choose slow heating and cooling methods. At the same time, check for obvious defects before use and avoid using cracked or damaged products. During operation, use and store with care to avoid collision or falling.

Q4:How to clean and maintain alumina ceramic rings?

Clean the surface of the product regularly; you can use a mild detergent and a soft cloth to wipe it, and avoid using too intense cleaning methods to avoid damaging the surface. At the same time, the alumina ceramic rings should be properly stored to avoid moisture, heat or other chemical substances.

Q5:What is the replacement cycle of alumina ceramic rings?

The replacement cycle of alumina ceramic rings depends on the environment and conditions of use. Generally, it is recommended to remove 1/4 of the ceramic rings after 8-10 months of use and add new ones, and so on, until all the old ceramic rings are replaced.