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Si3N4 Beads

Silicon Nitride has good high temperature strength, creep resistance and oxidation resistance, Silicon Nitride offers the low thermal expansion coefficient gives good thermal shock resistance compared with most ceramic materials.
Silicon nitride is sintered at high temperature( around 2000℃) and highly densified . Compared to silicon carbide, silicon nitride has better mechanical strength and thermal shocking resistance. It also posses excellent electrical insulating property, wear resistance and corrosion resistance
Availability:
Quantity:

9414



Product Introdution:

 Silicon Nitride Ceramic Ball is the most ideal bearing ball for bearing applications, due to the excellent properties of silicon nitride ceramics, it has many irreplaceable advantages comparing to traditional steel materials, such as: high mechanical strength, low wear loss, good self-lubrication, low density, high corrosion resistance, good electrical insulation etc.              

Therefore, Silicon Nitride Balls are mostly used for some harsh working conditions: high speed/super speed bearings, high precision bearings, bearings in vacuum, high/low temperature bearings.


 Moreover, Silicon Nitride Ceramic Balls can also used as valve ball or measurement balls in chemical pumps/high temperature pumps/metdering pumps.





Feature:

  High Hardness and wear-resistant, Strong acid, alkali resistance, can also be used in Seawater, Nonmagnetic, electrical insulation, can also be used in magnetic field, Centrifugal force is small when rotating due to the low density, Coefficient of Thermal Expansion is only 1/4 of GCrls, can be used in high temperature etc.




Physical Parameterts:


Chemical Composition: Si3N4≥95%
Bulk Density: 3.2±0.05g/cm3
Elastic Modulus: 350GPa
Hardness Vickers: 1870HV
Bending Strength 780MPa
Fracture Toughness 7.2MPa·m1/2
Thermal Expansion Coefficient: 3.2 10-6/K
Thermal Conductivity: 25W/(m·K)




Size Available:


Available Size:(mm) Round Φ0.8-Φ180;
cylinder 3*3, 5*5, 7*7, 10*10, 12.7*12.7, 15*15;


Remarks:We could also produce customized products as to customer’s request.


Feature:

  High Hardness and wear-resistant, Strong acid, alkali resistance, can also be used in Seawater, Nonmagnetic, electrical insulation, can also be used in magnetic field, Centrifugal force is small when rotating due to the low density, Coefficient of Thermal Expansion is only 1/4 of GCrls, can be used in high temperature etc.


Application:

1. Precision machinery industry under harsh working environments such as high temperature, high vacuum, corrosion, and high speed;

2. High temperature and harsh environment such as foundry industry;
3. Aluminum casting parts and consumables;
4. PV industry, precision electronics and aviation;
5. Automobile, new energy industry.etc.




Packing & Delivery:

5

Package:

    25KG/Plastic Drum, 800-1000KG/Pallet with shrink wrapped.


Storage:

    The grinding media should be stored in a dry and clean place.

Chemical Composition:

Composition

ZrO 

CeO + Others 

Content %

≥80

≤20


Typical Properties:

Specific Gravity

g/cm³

Bulk Density

g/cm³

Bending Strength

MPa

Hardness

Hv

Fracture Toughness

MPam1-2

Crushing Load

Kgf(Φ1.50mm)

Sphericity

(%)

≥5.95

≥3.70

1000-1200

≥1150

7

≥70

≥98


Sizes Φ:


Size (mm)

Size(mm)

Size(mm)

Size(mm)

0.4-0.6

1.0-1.2

1.6-1.8

2.4-2.6

0.6-0.8

1.2-1.4

1.8-2.0

2.6-2.8

0.8-1.0

1.4-1.6

2.2-2.4

2.8-3.0

Note: Size can be customized as per request.


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