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  • Ceramic Materials and Their Properties

    • Zirconia Balls

    Zirconia Balls Uses:

    High precision zirconia balls are available in many sizes.  Zirconia balls are most commonly used as check valves in flow control applications.  When subject to stress by impact, grinding, or cracking, a zirconia ball undergoes “transformation toughening” which stops cracks from spreading and actually makes the ball stronger in the stressed area than what it was originally.

    Corrosion Resistance:

    Zirconia balls also feature resistance to abrasion and corrosion and are chemically inert to molten metals, organic solvents, caustics, and most acids.

    Characteristics:

    1. Density 6 g/cm3
    2. Good wearability
    3. Max working temperature up to +400C
    4. High hardness Hv 1200
    5. Nonmagnetic
    6. Electrical isolating
    7. Self-lubricating
    8. Excellenct corrosion resistance
    9. Not applicable for high speed bearings
    Balls dimension Regularvalue

    (mm)

    		 Balls Qty/Kg
    mm inch SSiC Si3N4 ZrO2 Al2O3
    0.5  0.5000
    0.7 0.7000
    1/32 0.7938
    0.8 0.8000
    1 1.0000
    1.2 1.2000 349761 345389 183291 283396
    1.3  1.3000
    1.5 1.5000 179077 176839 93845 145099
    1/16 1.5785 151068 149180 79167 122404
    5/64 1.9844
    2 2.0000 75548 74604 39519 61213
    3/32 2.3812 44764 44204 23458 36270
    2.5 2.5000 38681 38197 20270 31341
    7/64 2.7781
    3 3.0000 22385 22105 11731 18137
    1/8 3.1750 18884 18647 9896 15301
    3.5 3.5000 14096 13920 7387 11422
    5/32 3.9688 9668 9547 5066 7834
    4 4.0000 9444 9325 4949 7652
    4.5 4.5000 6632 6550 3476 5374
    3/16 4.7625 5595 5525 2932 4533
    5 5.0000 4835 4775 2534 3918
    5.5 5.5000 3633 3587 1904 2943
    7/32 5.5562 3524 3480 1847 2855
    15/64 5.9531 2865 2829 1501 2321
    6 6.0000 2798 2763 1466 2267
    1/4 6.3500 2360 2331 1237 1913
    6.5 6.5000 2201 2173 1153 1783
    17/64 6.7469 1968 1943 1031 1594
    7 7.0000 1762 1740 923 1428
    9/32 7.1438 1658 1637 869 1343
    7.5 7.5000 1433 1415 751 1161
    5/16 7.9375 1209 1193 633 979
    7.98  7.9800
    8 8.0000 1180 1166 619 956
    8.5 8.5000 984 972 516 797
    11/32 8.7312 908 897 476 736
    9 9.0000 829 819 434 672
    9.5 9.5000 705 696 369 571
    3/8 9.5250 699 691 367 567
    10 10.000 604 597 317 490
    13/31 10.319 550 543 288 446
    11 11.000 454 448 238 368
    13/32  10.3188
    7/16 11.113 440 435 231 357
    11.5 11.500 397 392 208 322
    29/64 11.509 396 392 208 321
    15/32 11.906 358 354 188 290
    12 12.000 350 345 183 283
    31/64 12.303 325 320 170 263
    1/2 12.700 295 291 155 239
    13 13.000 275 272 144 223
    17/32 13.494 246 243 129 199
    14 14.000 220 218 115 178
    9/16 14.288 207 205 109 168
    15 15.000 179 177 94 145
    19/32 15.0812 176 174 92 143
    5/8 15.8750 151 149 79 122
    16 16.0000 148 146 77 120
    21/32 16.6688 130 129 68 106
    17 17.0000 123 121 64 100
    11/16 17.4625 113 112 59 92
    18 18.0000 104 102 54 84
    23/32 18.2562 99 98 52 80
    19 19.0000 88 87 46 71
    3/4 19.0500 87 86 46 71
    25/32 19.8438 77 76 41 63
    20 20.0000 76 75 40 61
    13/16 20.6375 69 68 36 56
    21 21.0000 65 64 34 53
    22 22.0000 57 56 30 46
    7/8 22.2250 55 54 29 45
    23 23.0000 50 49 26 40
    29/32 23.0188 50 49 26 40
    15/16 23.8125 45 44 23 36
    24 24.0000 44 43 23 35
    25 25.0000 39 38 20 31
    1 25.4000 37 36 19 30
    26 26.0000 34 34 18 28
    1 1/16 26.9875 31 30 16 25
    28 28.0000 28 27 14 22
    1 1/8 28.5750 26 26 14 21
    30 30.0000 22 22 12 18
    19/16  30.1625
    5/4 31.7500
    1 3/8 34.9250
    35 35.0000
    1 1/2 38.1000
    1 5/8  41.2750
    1 11/16  42.8625
    1 7/8  47.6250
    2 50.8000

    Zirconia Balls – High Temperature Resistance and Toughness

    As a new type of ceramic bearing material, zirconia ball has excellent physical and chemical properties. Zirconium oxide is also used as a refractory material and high temperature resistant material in industrial production. Due to its high toughness, high strength and high wear resistance, and its excellent thermal insulation properties, the zirconia ball is also very close to steel, so it is the core component of the bearing and also meets the high bearing requirements in various fields.

    Other Advantages of Zirconia Balls

    Because zirconia balls are resistant to magnetism, insulation, wear, corrosion, oil-free self-lubrication, high temperature resistance, and high cold resistance, they can also be used under extremely harsh environmental conditions. Ceramic bearings with zirconia balls are more effective than conventional ball bearings and plain bearings in terms of product life and noise stability. At the same time, the thermal conductivity of zirconia balls is also the lowest among the common ceramic material bearings.

    Zironica Balls – Ball Bearing New Materials

    In the new materials research and development, zirconia balls have sensitive electrical performance parameters and are mainly used in various fields such as sensors, fuel cells and high temperature heating elements. Among various functional component devices, zirconia balls are also electrically conductive and are also well utilized in oxygen sensors for monitoring and quality inspection.

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