Wear-resistant and corrosion-resistant alumina ceramic plunger

Overview of Alumina Ceramic Plunger

Alumina ceramic plunger is a widely used industrial component. It is made of high-purity alumina powder through molding, high-temperature sintering and other processes. It has extremely high hardness and wear resistance, second only to diamond, and can effectively resist the wear of the material on the plunger surface. At the same time, the alumina ceramic plunger has good corrosion resistance and high-temperature resistance and can still maintain stable operation under harsh working conditions. The smooth surface and high-precision size of the alumina ceramic plunger can achieve a good sealing effect and reduce leakage. It is often used in plunger pumps and other equipment in hydraulic, mining, chemical and other industries, which can effectively improve the service life and work efficiency of the equipment.

Features of Alumina Ceramic Plunger

Alumina ceramic plungers have excellent performance. The surface of alumina ceramic plungers is smooth, and the dimensional accuracy is high, which can achieve a good sealing effect and reduce leakage. Alumina ceramic plungers have excellent wear resistance and corrosion resistance. Under normal use, the service life of alumina ceramic plungers is 10-20 times longer than that of metal plungers. They can withstand corrosion from various strong acids and alkalis to prevent the plunger body from rusting and cracking. They also have the characteristics of high-temperature resistance, insulation, good biocompatibility, etc., and can work stably under special environments.

The microporous structure of the working surface of the alumina ceramic plunger has a self-lubricating effect, which changes the sliding friction and lubrication mechanism of the traditional plunger pump, reduces sliding resistance and wear, and improves the working efficiency and reliability of the pump.

In addition, the processing concentricity of the alumina ceramic plunger is high, which can adapt to the working conditions of large flow, high stroke frequency and large particles.

Specifications table of Alumina Ceramic Plunger

Parameter	Description	Typical Value/Range
Material	Main material used for the plunger	99.5% – 99.9% Alumina (Al₂O₃)
Density	Material density	3.9 – 4.0 g/cm³
Hardness	Vickers hardness	1800 – 2000 HV
Flexural Strength	Ability to withstand bending forces	350 – 400 MPa
Compressive Strength	Ability to withstand compressive forces	2500 – 3000 MPa
Fracture Toughness	Resistance to crack propagation	4 – 5 MPa·m½
Dielectric Strength	Electrical insulation capability	15 – 20 kV/mm
Thermal Conductivity	Ability to conduct heat	20 – 30 W/m·K
Coefficient of Thermal Expansion	Expansion rate with temperature change	7 – 8 x 10⁻⁶ /°C
Surface Finish	Surface roughness	Ra 0.1 – 0.5 µm (polished)
Dimensional Tolerance	Precision of dimensions	±0.05 mm (typical)
Corrosion Resistance	Resistance to chemical attack	Excellent in most acids and alkalis
Operating Temperature Range	Temperature range for normal operation	-50°C to 1800°C (depending on application)
Maximum Working Pressure	Maximum pressure it can withstand	Up to 100 MPa (depending on design)
Lubrication Requirement	Need for lubrication	Low or no lubrication required due to self-lubricating properties
Color	Appearance	White or off-white
Customization	Ability to customize dimensions and shapes	Available based on customer requirements

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Applications of Alumina Ceramic Plunger

Alumina ceramic plunger is a high-performance ceramic component with high-purity aluminum oxide (Al₂O₃) as the main component. It plays an important role in many industrial fields due to its excellent physical and chemical properties. In the field of mechanical manufacturing, alumina ceramic plungers are widely used to manufacture high-precision hydraulic cylinder plungers. I

In the chemical industry, alumina ceramic plungers are often used as plungers for metering pumps in strong acid and alkaline environments.

In the field of electronic equipment manufacturing, alumina ceramic plungers can be used to manufacture high-precision injection molding mold plungers. Its good electrical insulation and high-precision processing capabilities can ensure accuracy and surface quality during the molding process, meeting the high-precision and high-quality requirements of electronic component manufacturing.

 Alumina ceramic plungers are also widely used in equipment in the food processing and pharmaceutical industries. Its good biocompatibility enables it to meet the strict requirements of these industries for hygiene and safety.

All in all, alumina ceramic plungers have become an important component in modern industry due to their many excellent properties, providing a strong guarantee for the efficient and stable operation of various equipment.

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 Plunger

Q1:What are the advantages of alumina ceramic plungers compared to plungers made of other materials:？

Compared with metal plungers, it has better oxidation resistance, corrosion resistance, and wear resistance, is not easy to deform, can maintain high precision for a long time, and is light in weight; compared with plastic plungers, it is resistant to high temperatures, has high hardness, and has better dimensional stability; compared with silicon carbide plungers, it has relatively low cost and high-cost performance, so it has become the preferred material in many fields.

Q2:What matters need to be paid attention to when using alumina ceramic plungers？

During installation, ensure that the plunger and sleeve are well matched, the contact surface is kept clean, and after installation, the threads must be tightened and sealed with sealant; during use, suitable hydraulic oil must be selected, filtered and replaced regularly; cooling water must be passed when the pump is started and working to prevent the plunger from bursting due to temperature changes; check the seals regularly and replace them in time; avoid overload operation and long-term operation without lubrication or semi-lubrication, and prevent foreign matter from entering the system and scratching the plunger surface.

Q3:How to judge whether the alumina ceramic plunger needs to be replaced？

If the plunger surface has obvious wear, scratches, cracks and other damage, or the clearance with the sleeve is too large, resulting in increased leakage, unstable working pressure, insufficient flow and other problems, affecting the normal operation and work efficiency of the equipment, the alumina ceramic plunger needs to be replaced in time.

Q4:How long is the service life of an alumina ceramic plunger？

Its service life is affected by many factors, such as working environment, frequency of use, load size, maintenance and so on. Under normal working conditions, the service life of a high-quality alumina ceramic plunger can usually reach several years or even more than ten years. In contrast, the service life of a metal plunger is generally shorter, which may be only a few months to a year.

Q5:The price of alumina ceramic plungers is relatively high, is it cost-effective?

Although the initial investment cost of alumina ceramic plungers is relatively high, due to its excellent wear resistance, corrosion resistance and long service life, it can greatly reduce the number of equipment repairs and replacements and reduce equipment downtime and maintenance costs. In the long run, its comprehensive use cost may be lower than that of traditional metal plungers, and it has a higher cost-effectiveness.