Ceramic tube is a new type of material which is formed by sintering zirconia and alumina ceramic materials. Ceramic tube is formed by isostatic pressing, hot pressing, dry pressing and other processes, and then waxed or degreased and then sintered at a high temperature. Ceramic tubes are used in aerospace, medical equipment, military machinery and other fields.

Ceramic Tube Material Classification

1． Zirconia Tube

The zirconia ceramic tube is a new type of industrial ceramic material made of highly refined, high-purity, ultra-fine, non-polar compound. Compared with traditional ceramics, it has a wider range of applications and is more durable and suitable for industrial use. The zirconia tube has good high temperature strength, high breaking strength, high hardness and good thermal shock resistance.

Zirconia tube technical parameters:

Density: 6g/cm3,

Hardness: 13.2GPa,

Flexural strength: 1000MPa,

Modulus of elasticity: 200Gpa,

Thermal conductivity: 2.6W/(m/K),

Coefficient of thermal expansion: 11×10-6/°C,

Maximum operating temperature: 2400°C.

2. Alumina Tube

Alumina ceramic tubes are a non-metallic material. Alumina ceramics are classified into 75, 85, 90, 92, 95, 97, 99 according to the content of aluminum. If the content is larger than 90, it is called high alumina ceramic, otherwise it is called ordinary alumina ceramic; if it is larger than 99, it is called super high alumina ceramic composite. Alumina tube has the advantages of high temperature resistance and low transportation cost. The disadvantages are poor toughness and easy fracture.

3. Zirconia Toughened Alumina Tube

Zirconium oxide toughened alumina tube (ZTA tube) has mechanical strength and wear resistance and can be used as an ideal material between zirconia and alumina. It was established that ZTA ceramic tube is stronger and tougher than regular alumina ceramics.

Ceramic Tube Application Field

Ceramic tubes are widely used in instrumentation, medical equipment, watches, abrasive tools, energy and power, construction, mechanical hardware, automotive, military, aerospace and other fields.

Ceramic Tube Color

The common color of ceramic tubes is white, also known as ivory. White tubes are also the most widely used of all ceramic rods. Of course, there are other colors of ceramic tubes, such as blue, black, gray ceramic rods, yellow, etc. The density and hardness of ceramic rods of different colors are different.

Ceramic Tube Forming Process

1. Isostatic Molding

Process: fill the powder into the rubber mold→ isostatic pressing → sintering → grinding and polishing

Advantages: high density, good quality, high volume molding

Disadvantages: high cost, unable to make special shapes

2. Injection Molding

Process: purchase airflow powder → with chemical components → stir evenly → dry → break → injection molding→ Discharge → Sintering → Post-processing

Advantages: special ceramic materials with special shapes and small sizes can be made, which can be mass-produced;

Disadvantages: Can not make products with large size