Introduction of Alumina Ceramic Casing
Alumina ceramic casing is a tubular component made of high-performance ceramic material, which is made of high-purity alumina (Al₂O₃) as raw material by high-temperature sintering. It has very high hardness, excellent abrasion resistance, corrosion resistance and electrical insulation, strong chemical stability, and is widely used in electronics, machinery, chemical industry and other fields, such as insulating casing, wear-resistant parts, etc., is an indispensable basic material in modern industry.
alumina ceramic casing
Characteristics of alumina ceramic casing
Super high performance index
Hardness and wear resistance: Vickers hardness ≥ 1800 HV, second only to diamond, in high load friction scenarios (e.g., bearings, seals), the wear rate is only 1/10 of the metal material, and the service life is increased by 5-8 times.
Electrical insulation: dielectric strength ≥15 kV/mm, volume resistivity ≥10¹⁶ Ω・cm, can be used as a reliable insulating component in high-voltage environments to prevent the risk of leakage.
Thermal stability: Operating temperature range - 50°C to 1800°C (vacuum environment up to 2000°C), coefficient of thermal expansion 7.5-8.0×10-⁶/°C, dimensional change rate < 0.3% at high temperature.
Chemical resistance and environmental adaptability
In addition to hydrofluoric acid, the corrosion rate of strong acid (e.g., sulfuric acid) and strong alkali (e.g., sodium hydroxide) is < 0.01 mm/year, which is suitable for corrosive environments such as chemical pipeline lining and reactor components.
The surface roughness Ra<0.8 μm, smooth inner wall to reduce media retention, can be used for food-grade, pharmaceutical-grade fluid transportation systems.
Precision machining and customization capability
Dimensional tolerances are controlled to ±0.05 mm, supporting customization of precision casing with an OD of 1-500 mm and a length of 5-3000 mm to meet micron-level precision requirements (e.g., semiconductor wafer transfer shaft casing).
Surface treatments such as polishing and coating (e.g., diamond-like coating (DLC)) are available to enhance adhesion and corrosion resistance further.
Alumina Ceramic Tubing Specifications
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Applications of Alumina Ceramic Tubing
Electronics and Semiconductor Industry
Wafer manufacturing: as a precision bushing for photolithography equipment, it is used with air-bearing to realize nano-scale positioning accuracy, and the surface roughness is controlled at Ra<0.2 μm to avoid particle contamination.
Power device packaging: Insulation sleeves are used for IGBT modules with dielectric strength to meet 1200V high-voltage environment, and high airtightness (leakage rate < 1×10-⁹ Pa・m³/s) is realized through ceramic-metal sealing technology.
Machinery and Automation
Industrial robots: The joint-bearing sleeve is made of wear-resistant alumina ceramics with a coefficient of friction of < 0.02. Together with grease, it can achieve 20,000 hours of trouble-free operation and reduce the frequency of maintenance.
Automotive components: new energy vehicle motor bushings and motor oil corrosion resistance, at the same time, can withstand 150 ° C high temperature and high-speed rotation (speed ≥ 20,000 rpm).
Chemical and new energy industry
Lithium battery production line: 95% alumina ceramic sleeve for positive and negative electrode material slurry transport, hydrofluoric acid corrosion resistance (HF concentration ≤ 5%), smooth inner wall to reduce slurry residue, cleaning cycle extended to 72 hours.
Chemical pipeline system: as a strong corrosive medium (such as concentrated nitric acid) transportation pipeline lining, the service life of stainless steel pipe to enhanced 10 times, reducing the risk of leakage and downtime costs.
Aerospace and Defense
Aero-engine: turbine blade cooling sleeve, stable in 1500°C gas environment, through the gradient material design (Al₂O₃-ZrO₂ composite layer) to reduce thermal stress, thermal shock resistance increased by 40%.
Missile guidance system: insulated support sleeve for an inertial navigation device, with dimensional stability of ≤±1 μm under temperature change from - 40°C to 120°C, guaranteeing guidance accuracy.
Company Profile
Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) is a trusted global chemical material supplier & manufacturer with over 12-year-experience in providing super high-quality chemicals and nanomaterials, including boride powder, nitride powder, graphite powder, ceramic products, 3D printing powder, etc.
The company has a professional technical department and Quality Supervision Department, a well-equipped laboratory, and equipped with advanced testing equipment and after-sales customer service center.
If you are looking for high-quality Ceramic Products please feel free to contact us or click on the needed products to send an inquiry.
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Q1:What are the advantages of alumina ceramic sleeves in lithium battery material delivery systems?
In recent years, 95% alumina ceramic sleeves have been widely used in lithium battery material delivery systems, mainly because of their better inner and outer tube material purity, higher wear resistance, corrosion resistance, impact resistance and high-temperature resistance, and smaller pipeline flatness, which can effectively improve the efficiency and safety of lithium battery material delivery and extend the service life of the delivery system.
Q2:How to choose a suitable alumina ceramic sleeve?
Consider the working temperature: Select alumina ceramic sleeves with appropriate purity and specifications according to the temperature conditions in actual applications to meet the use requirements in high-temperature environments.
Evaluate corrosion resistance requirements: For the corrosive substances in the conveyed medium and working environment, select alumina ceramic sleeves with corresponding corrosion resistance to ensure their stability and reliability in corrosive environments.
Determine the size specifications: According to the size and design requirements of the pipeline system, select the appropriate outer diameter, inner diameter length and other size specifications to ensure good matching and installation convenience between the ceramic sleeve and the pipeline.
Q3:What is the service life of alumina ceramic Sleeves?
Under normal use and maintenance, the service life of alumina ceramic Sleeves is long, generally up to several years or even longer, which is mainly due to its high hardness, wear resistance, corrosion resistance and high-temperature resistance.
Q4:What is the cost-effectiveness of using alumina ceramic Sleeves?
Although the initial investment cost of alumina ceramic Sleeves is relatively high, due to its long service life, low maintenance cost and high reliability, it can provide users with significant cost benefits in the long run. It can reduce equipment downtime and maintenance work, improve production efficiency, and reduce safety risks and production losses caused by equipment failure. Therefore, it is widely used in many industrial fields.
Q5:How high a temperature can alumina ceramic Sleeve withstand?
Alumina ceramic Sleeve has excellent high-temperature resistance and can work stably for a long time in high-temperature environments. Generally, it can withstand temperatures up to 1650℃ in an oxidizing atmosphere or a reducing atmosphere and can even withstand high temperatures of 2000℃ in a vacuum environment.
