Functional Ceramics

Functional Ceramics is knowledge and technology-intensive products. It has found that the oxide conductor, a solid electrolyte, a piezoelectric, a nonlinear optical material, ferrite, memory materials, solar cells, and other high-temperature oxide superconductor. As electronic products to the compact size, versatility, reliability and high surface density and high integration of development, functional materials also has a continuous development.

(1) Electrical Insulation

Now commonly Al2O3 is used electrical insulating materials at home and abroad. New electronic insulating materials in recent years, such as AlN ceramics, has excellent properties of high strength, high insulation resistance, low dielectric constant, high thermal conductivity, etc., and the coefficient of thermal expansion can be matched with silicon, the main application as LSI and the power module circuit board heat dissipation.

(2) a dielectric material

For tuning circuits to protect the majority logic and memory unit ceramic capacitor dielectric material is BaTiO3-based materials, in addition to high dielectric composite perovskite materials to develop a frequency of 105Hz, the dielectric constant of the high dielectric material up to 105 currently it appears grain boundary layer capacitors, dielectric constant conventional ceramic capacitor increased several times or even several times.

(3) a piezoelectric ceramic material

Common piezo elements: sensors, gas ignition, alarm, audio equipment, medical diagnostic equipment and communications. Typically piezoelectric material is PZT, a new type of piezoelectric ceramic materials are: high sensitivity, high stability piezoelectric ceramics, electrostrictive ceramics, pyroelectric ceramic materials.

(4) magnetic ceramic material

Magnetic ceramic material can be divided into two types of hard magnetic and soft magnetic material, the former is easy magnetization, but also easy to lose magnetism. Representative hard magnetic material ferrite magnets and rare earth magnets, primarily used for magnets and magnetic storage element. Soft magnetic material easy magnetization and demagnetization, the magnetic field direction can be changed in response to an alternating magnetic field is mainly used for electronic components.

(5) superconducting ceramic material

From the 1980s to study superconducting ceramics has been a major breakthrough for high-temperature superconducting ceramic materials research and application closely watched. Over the last few years, China's research in this area has been in the world's advanced level. Current application of high temperature superconducting material is moving in high-current applications, electronic applications, anti-magnetic and other aspects of development.

(6) anti-bactericidal ceramic material

Bactericidal anti-ceramic material is a new generation of functional materials with the development of science and social civilization produced. Inorganic anti-microbial fungicide according to the mechanism can be divided into three categories: one is primarily by physical adsorption or ion exchange silver, copper, zinc and other anti-bactericidal action of metal or ions fixed in the zeolite, apatite, the second category is the role of the photocatalytic titanium dioxide particles of anti-bactericide, titanium dioxide in the light enables oxygen molecules into active oxygen, aquatic life so that oxygen free radicals play an antimicrobial sterilization; silica, glass and other inorganic materials on a carrier made ; the third category is having a far-infrared radiation function of bactericidal anti-material, limited anti-bactericidal effect far infrared, so this material must be used in conjunction with the former two materials, in order to have better value.