Ceramic Tube

Ceramic Tube

Ceramic tubes are mainly composed of alumina, zirconia, silicon nitride and other ceramics. They provide excellent high temperature resistance, mechanical strength, electrical insulation, wear and corrosion resistance, etc., making them indispensable components in numerous industrial applications.

1.Characteristics of alumina tube

Resistance to High Temperatures

Because of their exceptional thermal stability, alumina tubes can withstand temperatures up to 1500°C. This makes them perfect for use in high-temperature applications including furnaces, kilns, and thermal processing systems.

Superior Mechanical Strength

Alumina tubes possess remarkable mechanical properties, such as high strength and hardness. Their hardness ensures resistance to wear and abrasion, making them suited for use with abrasive materials. Alumina tubes also have remarkable fracture toughness, which enables them to withstand thermal shocks and mechanical impacts without breaking.

Chemical Stability

Alumina tubes exhibit outstanding chemical stability, which means that they have great resistance to corrosion caused by a wide variety of acids, alkalis, and solvents. Due to this characteristic, they are appropriate for application in laboratory settings, chemical processing, electroplating, and other environments requiring corrosion resistance.

Electrical Insulation

Alumina tubes are extensively used in electrical insulating applications and electronic devices due to their superior electrical insulation. They are perfect for high-voltage applications and as electrical feedthroughs in vacuum systems because they continually provide insulation and protection against electric currents.

Customized Design

Alumina tubes can be tailored to varying sizes, shapes, and part configuration to fulfill specific application needs. Whether round, square, rectangular, or specialized designs, UNIPRETEC can customize the ceramic tubes to fit unique engineering designs and installation needs.

 

2.Characteristics of Zirconia Tube

Low Thermal Conductivity

Zirconia tubes function as excellent thermal insulators and thermal barriers in some applications due to their low thermal conductivity.

Chemical Inertness

Zirconia tubes are extremely resistant to chemical corrosion, making them ideal for applications that need exposure to harsh chemicals or corrosive substances.

Abrasion Resistance

Zirconia tubes have great resistance to abrasion, making them advantageous in situations where components are subjected to high levels of abrasive forces.

Dimensional Stability

Zirconia tubes are a dependable option for applications needing precise tolerances since they remain their size and shape even under the most challenging conditions.

 

3.Characteristics of Silicon Nitride Tube

Silicon nitride ceramics are covalent compounds composed of silicon and nitrogen atoms. The silicon nitride tubes have the following characteristics:

Superior Thermal Shock Resistance

Silicon nitride tubes exhibit exceptional thermal shock resistance and thermal stability. This indicates that they are resistant to fracturing or cracking in the face of sudden temperature changes. Because of this characteristic, they can be used in high-temperature environments like industrial furnaces, aerospace components, and automotive engines.

High Strength and Durability

Silicon nitride tubes have notable mechanical properties, such as outstanding toughness and strength, resistance to fracture and deformation when subjected to heavy loads, and so forth. Even under challenging and stringent operating conditions, they can guarantee dependable performance.

Wear Resistance

Silicon nitride tubes have excellent wear resistance, allowing them to endure abrasive contact and sliding forces while reducing the need for frequent replacements. This improves operational efficiency and prolongs service life.

Corrosion Resistance

Silicon nitride tubes are chemically inert, which ensures their longevity in applications involving chemicals or corrosive substances.

 

Dimension and Shape

Ceramic tubes can be made in a variety of shapes, such as round, square, and rectangular, etc. The dimensions can be precisely modified to match the application's unique requirements.

Surface Finish

Depending on the use, the surface of a ceramic tube can be finished from rough to polished, to ensure optimal performance and operation.

Tolerance and Accuracy

High precision and tight tolerances are both achievable in the production of ceramic tubes.

 

Factors Influencing the Price

Production Method

Methods such as extrusion, isostatic pressing, and slip casting have different cost implications. Extrusion might be less expensive for standard shapes, while isostatic pressing is used for high-precision components, increasing the price.

Finishing Processes

Additional finishing steps like grinding, polishing, and machining add to the overall cost.

Quantity and Customization

Batch Size

Larger production runs benefit from economies of scale, reducing the per-unit cost.

Customization

Custom specifications, including unique dimensions, specialized properties, or specific applications, will generally cost more.

General Price Ranges

While prices can vary widely, here are some general ranges for ceramic tubes based on common materials and sizes:

Alumina Tubes

Small, standard tubes (e.g., 1 cm diameter, 10 cm length): $10 - $50 each.
Larger or customized tubes: $100 - $500 or more each.

Zirconia Tubes

Small, standard tubes: $20 - $100 each.
Larger or customized tubes: $200 - $800 or more each.

Silicon Nitride Tubes

Small, standard tubes: $40 - $200 each.
Larger or customized tubes: $400 - $1,200 or more each.

Applications of Alumina Tube

- High temperature furnaces and kilns
- Chemical processing and corrosive environments
- Electronic devices and electrical systems
- Thermal management systems
- Semiconductor manufacturing and vacuum systems
- Oil and gas exploration and production

 

Applications of Zirconia Tube

-Furnace Components
-Pump Systems
-Chemical Processing
-Electronics and Electrical Engineering
-Molten Metal Handling
-Medical and Dental

 

Applications of Silicon Nitride Tube

-Automotive and aerospace applications
-Cylinder Sleeves
-Liner Tube
-Energy Industry
-Industrial Wear Components

Ceramic tubes provide excellent heat resistance, mechanical strength, electrical insulation, wear and corrosion resistance, thermal stability, etc., and can be widely used numerous industrial applications.

Manufacturing Process of Ceramic Tube

1.Raw Material Preparation

The process begins with preparing high-purity ceramic powder. The powder can be mixed with some additives.

2. Shaping

The raw material mixture is shaped into tubes using various techniques, such as extrusion, isostatic pressing, or slip casting.

3. Drying

The formed tubes are dried to remove excess moisture or binders.

4. Sintering

The dried tubes are subjected to high-temperature sintering, where they are heated to generate a dense and solid structure.

5. Finishing

The sintered tubes may undergo additional processes like polishing, in order to meet specific dimensional and surface finish requirements.

Ceramic Tube
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