Precision ceramics include a wealth of types such as alumina, zirconia, silicon carbide, and aluminum nitride. With the advancement of manufacturing technology, the types of raw materials used, the size of particles, and the firing method are also changing to achieve various characteristics. According to different uses and purposes, select suitable precision ceramic materials, determine the shape, sinter, and process them into various products.
This is a widely used material as a representative of precision ceramics.
The material has excellent mechanical strength, electrical insulation, high frequency loss, thermal conductivity, heat resistance, wear resistance and corrosion resistance. Sapphire is a single crystal of alumina.
This is a precision ceramic with high strength and toughness. It can also be applied to knives (scissors, kitchen knives, etc.) that were impossible in the past. Single crystals have high refractive index and can sparkle like diamonds, so they are also used in jewelry.
The material has excellent toughness and thermal shock resistance at high temperatures, is light in weight, and has high corrosion resistance, making it an ideal choice for engine components.
Silicon Carbide (SIC)
This material is an artificial compound that does not exist in nature, synthesized by quartz sand and carbon. In addition to maintaining strength at high temperatures (1,500°C), it also has the characteristics of light weight, good corrosion resistance, and excellent performance as a heat-resistant material.
Aluminum Nitride (AlN)
Aluminum nitride has high thermal conductivity and is suitable for applications such as packaging materials for semiconductor parts that require heat dissipation.
The material has a low coefficient of thermal expansion and, therefore, has excellent thermal shock resistance. It is widely used in porous materials such as honeycomb carriers, refractory materials for electric heaters, and equipment materials for the chemical industry.
Magnetic body of fine ceramics. Because this material has high magnetic permeability, high electrical resistance and excellent wear resistance, it is widely used in magnetic heads and high-frequency magnetic cores.
Barium titanate (BaTiO3)
This material has a high dielectric constant in precision pottery and has excellent power storage performance, so it is mainly used as a material for capacitor parts. The dielectric properties will vary greatly due to the difference in the added elements.
Lead Zirconate Titanate
The material is used as a piezoelectric material, and has the function of generating vibration when an electric signal is applied, and converting it into an electric signal when vibration is applied. This feature (piezoelectricity) can be fully utilized for various electronic components (ceramic oscillators, ceramic filters, piezoelectric components, etc.).
The material has low microwave loss and excellent high-temperature insulation. The surface is smooth and can be used for electronic tube parts, circuit parts and circuit boards.
The material has a large thermal expansion coefficient and is easy to weld with metal and glass.
The material has a small thermal expansion coefficient and excellent thermal shock resistance, so it can be used for heat-resistant parts, wire-wound resistor skeletons, and electronic tube parts.
Mullite has excellent heat resistance and thermal shock resistance, especially good creep characteristics, and is an excellent heat-resistant material. The thermal expansion coefficient close to that of semiconductor silicon chips is also one of its characteristics.
The electrical and mechanical properties are better than ordinary porcelain, and at the same time, the mechanical processing performance is good.