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Jiangxi Sanxin Hi-Tech Ceramics Co., Ltd.
Silicon Nitride Powder
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Silicon Nitride Powder

Silicon Nitride is an important structural ceramic. It is an covalent crystal which is super hard, have lubricity, can stand wear and tear and antioxidant around high temperature. It won't break after hot (over 1000℃) and cold impact. Because of this character, people usually use it in making bearings, turbine blade, sealing ring, perpetual mould and other machinery components.

We can customize all kinds of silicon nitride powder: silicon nitride sintering powder, refining silicon nitride powder, silicon nitride formula powder, et.

Elements

Content (model)

Elements

Content (model)

Si%

99.9

O%

<0.9

Fe%

<0.11

N%

≥38

AI%

<0.05

α%

≥95

Ca%

<0.005

σRT/MPa

800-1000

C%

0.93

D50/μm

0.6

Silicon Nitride Powder

Power for silicon nitride (Si3N4) is light, hard, and has low thermal expansion coefficient. It has high mechanical strength, fracture toughness, and it is resistant to deformation at room temperature as well as at elevated temperature.

Si3N4 differs from other ceramics because it doesn't melt, but, between 1800 and 1900 °C, it decomposes and sublimates into Si and N. However, stabilized forms can be made. 

Engine parts: valves, pistons, etc. Gas turbines.

Diesel engines.

Cutting tools.

Bearings.

High strength over a wide temperature range.

High fracture toughness.

High hardness.

Outstanding wear resistance, both impingement and frictional modes.

Good chemical resistance.

Papermaking machine foils.

Wear parts.


Analyte

Result %

MKL

MKH

Typical

Max/Min

Typical

Max/Min

Si3N4

98.3

99.6%

Fe

0.25

0.19-0.30

0.04

0.03-0.06

Al

0.10

0.06-0.12

0.05

0.03-0.08

Ca

0.02

0.01-0.05

0.01

<0.02

Halides

<0.002

<0.002

<0.002

<0.002

C

0.2

<0.5

0.2

<0.5

O

0.7-1.5

0.7-1.5

0.7-1.5

0.7-1.5

Si, free

0.1

<0.2

0.1

<0.2

a- Si3N4

93

90-95

93

90-95

BET(m2/g)

(L) 6-8
(M) 8-10
(H)﹥10

6-12

(L) 6-8
(M) 8-10
(H)﹥10

6-12

D50(μm)

0.4-1.0

0.4-1.0

0.4-1.0

0.4-1.0

Physical performance.

Grain-size distribution.

Relative surface product.

Silt shape.

Above is through and latter synthesizes to the nitridationvariable, like Smashing, classification and other processing which the powder the controlled process determined. The B.E.T standard nitridedsilicon fine powder relative surface accumulates in 6m2/g and in the12m2/g level.

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