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As is known to all, the main raw material of alumina ceramic sheet is alumina, which has certain unique advantages. It is known that alumina ceramic plate is a kind of material with high thermal condu...
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Product Name: Si3N4 ceramic rod plate
Date of listing:2019-01-24
  • Si3N4 ceramic rod plate Si3N4 ceramic rod plate
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mechanical components silicon nitride ceramic feedstock bar rod stick wholesale supplier

Silicon Nitride Ceramic:

Silicon nitride ceramic is an inorganic material ceramic that does not shrink when sintered. Silicon nitride is very strong, especially hot pressed silicon nitride, which is one of the hardest substances in the world. It has high strength, low density and high temperature resistance.
Si3N4 ceramic is a covalent bond compound. The basic structural unit is a [SiN4] tetrahedron. The silicon atom is located at the center of the tetrahedron. There are four nitrogen atoms around it, which are located at the four vertices of the tetrahedron, and then every three A tetrahedron shares the form of an atom, forming a continuous and robust network structure in three dimensions.

Alumina ceramic properties: High hardness, high strength, wear resistance, corrosion resistance, high temperature(1200°), good thermal diffusivity, good thermal shock resistance(avoid the temperature changing rapidly), good insulativity, low density. The comprehensive properties are best in most of structure ceramic.

Data Sheet↓

Item

Unit

Typical Values

Physical Properties

Density

g/cm3

>3.2

Mechanical Properties

Hardness

HRA90

Vickers Hardness (Hv50)

HV0.5

>1550

Modulus of Elasticity

Gpa

290

Flexural Strength

Mpa

>600

Compressive Strength

Mpa

2500

Fracture toughness

Mpam1/2

>6.0

Thermal Properties

Maximum use temperature

°C

1200

Thermal Conductivity

W/(m.k)

15-20

Thermal Expansion Coefficient

10-6/°C

>3.1

Thermal Shock Resistance

△T°C

500

Specific Heat Capacity

KJ/kg.K

700

Electrical Properties

Dielectric Strength

KV/mm

1

Dielectric Constant

er

Volume Resistivity at 20°C

Ω.cm

1.0X10(12)

Application industry: Machinery, electronic, semiconductor, chemical, petroleum, smelt.
Specific application: Welding shaft, electronic substrate, plunger, nozzle, slide guide, diesel parts, metal molding, shaft wheels etc.

 


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