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What is Industrial Ceramics

Industrial ceramics, that is, ceramics for industrial production and industrial products. It is a kind of fine ceramics, which can play mechanical, thermal, chemical and other functions in application. Because industrial ceramics have a series of advantages such as high temperature resistance, corrosion resistance, wear resistance and erosion resistance, they can be used in harsh working environment instead of metal materials and organic macromolecule materials. They have become an indispensable important material in traditional industrial transformation, emerging industries and high-tech industries. They are used in energy, aerospace and machinery. It has very broad application prospects in automobile, electronics, chemical industry and other fields. Ceramics with good corrosion resistance and chemical stability in contact with biological enzymes are used to produce crucibles, heat exchangers and biomaterials such as dental artificial lacquer joints for smelting metals. Ceramics with unique neutron capture and absorption are used to produce various nuclear reactor structural materials.


Industrial ceramics refer to ceramics used in various industries. Industrial ceramics can be divided into ordinary ceramics and special ceramics.

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Classification of industrial ceramics:


Ordinary ceramics


Ordinary ceramics refer to clay ceramics, which are made of clay, feldspar and quartz. Their properties depend on the purity, particle size and proportion of the three raw materials. General texture is hard, corrosion-resistant, non-oxidizing, non-conductive, can withstand a certain high temperature and good processing formability.


Application:


Common ceramics in industry are mainly used for insulating electric ceramics, chemical ceramics with high acid and alkali requirements, structural parts with low bearing requirements, such as insulators, corrosion-resistant containers, pipes and decorative ceramics and tableware in daily life.


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alumina ceramic


According to the different main crystal phases in the ceramic body, it can be divided into corundum, corundum-mullite and mullite ceramics. It can also be divided into 75, 95 and 99 ceramics according to the mass fraction of AL2O3.


Application:


Alumina ceramics have high melting point, high hardness, high strength, good chemical corrosion resistance and dielectric properties. However, it has high brittleness, poor impact resistance and thermal shock resistance, and can not withstand drastic changes in environmental temperature. It can be used to manufacture high temperature furnace tubes, linings, spark plugs of internal combustion engines, cutting tools with high hardness, and thermocouple insulating sleeves.


Silicon carbide ceramics


Silicon carbide ceramics are characterized by high temperature strength, high heat conductivity, high wear resistance, corrosion resistance and creep resistance. They are often used as high temperature sintering materials in the fields of national defense and Aerospace Science and technology, i.e. nozzles for rocket nozzles, throats for casting metal, thermocouple bushings and furnace tubes. Pieces.


Application:


Because of its high heat conductivity, it can also be used to manufacture high temperature strength parts such as turbine blades and bearings, as well as materials for high temperature heat exchangers and nuclear fuel encapsulation materials.


Lithium oxide ceramics


The main crystalline phases of lithium oxide ceramics are nepheline (Li2O Al2O3 2SiO 2) and spodumene (Li2O Al2O3 4SiO 2). The main crystalline phases of lithium oxide ceramics are nepheline (Li2O Al2O3 4SiO 2). Their thermal expansion coefficient is low (in the range of 100 1000 C, it is - 0 Li2O is a kind of network external oxide, which can strengthen the glass network and effectively improve the chemical stability of glass.


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