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Ceramic Materials

  • Author:naky
  • Source:www.diecastingpartsupplier.com
  • Release on:2015-01-16
Ceramic Materials

Ceramic materials are natural or synthetic compounds after forming and sintering temperature of a class of
inorganic non-metallic materials. It has the advantage of high melting point , high hardness , high wear
resistance , resistance to oxidation and the like. Used as a structural material , tool material, since the
ceramic also has some special properties , but also as functional materials.

Mechanical properties
Ceramic materials are engineering materials stiffness Preferably , the highest hardness of the material , mostly
in hardness 1500HV or more. Ceramic high compressive strength but low tensile strength , ductility and toughness
is poor.

Thermal Characteristics
Ceramic materials generally have a high melting point ( mostly above 2000 ℃), and has excellent chemical
stability at high temperatures ; ceramic thermal conductivity is lower than a metallic material , a ceramic or a
good heat insulating material . While the linear expansion coefficient of the ceramic is lower than that of
metal , when the temperature changes , the ceramic has good dimensional stability.

Electrical characteristics
Most ceramics have good electrical insulation properties , and therefore produce a large number of various
voltages (1kV ~ 110kV) of the isolation device is used . Ferroelectric ceramics ( barium titanate BaTiO3) having
a high dielectric constant , can be used for the production of capacitors , under the action of an external
electric field of ferroelectric ceramics , can change shape , converting electrical energy into mechanical
energy ( having the characteristics of the piezoelectric material ) , can be used as amplifiers, record players
, ultrasonic instrument, sonar , and other medical sonographer . Ceramic also has a few properties of
semiconductors can be used as a rectifier.

Chemical properties
Ceramic materials easily oxidized at high temperatures , and acid , alkali, salt has good corrosion resistance.

Optical properties
Ceramic materials as well as the unique optical properties, can be used as solid-state laser materials, fiber
materials, optical storage devices , etc., can be used for high-pressure sodium lamp transparent ceramic tubes.
Magnetic ceramic ( ferrite such as : MgFe2O4, CuFe2O4, Fe3O4) in the audio tape , the application records,
transformer core , large computer memory device has a wide range of aspects of the future

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