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| What is Zirconox • Micro Milling Beads • Macro Milling Beads |
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| • Zirconox - Micro Milling Beads • Typical Properties • Sieve Analysis • Remarkable Wear Resistance • Comparative Typical Property |
| • Application • Guidelines |
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| Remarkable Wear Resistance of Zirconox Micro Beads |
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| The following wear tests were carried out in high speed vertical lab bead mill on various ceramic micro milling beads. |
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| Type of Beads |
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Bead Size |
| Glass |
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Dia 1.2 -1.7mm |
| Duralox : 92% Al203 (Jyoti) |
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Dia 1.2 -1.7mm |
| Zirconium Silicate :ZrO2SiO2 (France) |
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Dia 1.0 -1.6mm |
| Mg PSZ : MgO-PSZ (Israel) |
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Dia 1.4 -1.7mm |
| Ce.PSZ : ZrO2CeO2 (USA) |
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Dia 1.0 -1.2mm |
| Zirconox : ZrO2CeO2 (Jyoti) |
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Dia 1.2 -1.7mm |
| YTZ : ZrO2Y2O3 (Japan) |
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Dia 1.0mm |
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| Mill Type Make |
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Vertical Lab Bead Mill, Union Process U.S.A. |
| Model |
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01-HDDM, High Speed Vertical Lab Bead Mill |
| Mill Container |
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High purity 99.5% Alumina |
| Mill capacity |
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500 cc Net Volume |
| Mill Agitator Speed |
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3000 RPM (9.45 m/s) |
| Material |
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Baryte Powder: 262 gm |
| Water |
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125 ml |
| Dispersant |
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30 ml |
| Ceramic Media |
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Quantity 315 ml |
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| After milling for 24 hours, beads were collected, washed and dried thoroughly, weighed on sensitive electronic balance (resolution: 10 mg) and the percentage weight loss was calculated as: |
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Where P = Percent Weight Loss, W1 = Initial Weight of Micro Beads, W2 = Final Weight of Micro Beads. The percent wear loss of beads was determined and tabulated as under:
The wear loss of Zirconox beads was found insignificant as well as caused lowest wear on mill contact parts. In most vigorous milling test at 3000 RPM (9.45 m/s), the average wear loss of Zirconox beads was observed @ 0.0017% per hour. |
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| Graphical Representation of Wear Test Results |
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| Media Type |
% Cumulative wt. loss |
Wear Test hrs. |
| Glass Beads |
6.698 |
15 |
| Alumina 92% Beads |
5.94 |
15 |
| Zirconium Silicate Beads |
0.383 |
15 |
| Ce Stabilized Beads (other make) |
0.32 |
15 |
| MgO Stabilized beads, USA |
0.828 |
15 |
| YTZ Stabilized beads, JAPAN |
0.035 |
15 |
| Zirconox beads, JYOTI |
0.054 |
15 |
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| Practical Wear test With Zirconox-grinding beads (1.7-2.4mm) In comparison to actually used glass beads. Test conducted by TECHNOPLAN FARBTECHNIK GMBH&CO.KG GERMANY, June 1999. |
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| In reference to the graph: |
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Initially the cost of Zirconox is higher by about 17 times than the glass beads. |
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In the course of usage of the mill for about 18 months, it is realized that the amount spent on both types of micro media is the same. |
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At the end of 24 months testing it is observed that the cost of glass beads has increased by 40 % than the Zirconox. |
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| Comments: |
| 1 |
The above trend is mainly due to exorbitantly high wear of glass beads in comparison to Zirconox beads. |
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Figures from the graph indicate that the wear of glass beads is about 300 times higher than that of Zirconox. |
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