Remarkable Wear Resistance of Zirconox Micro Beads
The following wear tests were carried out in high speed vertical lab bead mill on various ceramic micro milling beads.
Type of Beads
Bead Size
Glass
:
Dia 1.2 -1.7mm
Duralox : 92% Al203 (Jyoti)
:
Dia 1.2 -1.7mm
Zirconium Silicate :ZrO2SiO2 (France)
:
Dia 1.0 -1.6mm
Mg PSZ : MgO-PSZ (Israel)
:
Dia 1.4 -1.7mm
Ce.PSZ : ZrO2CeO2 (USA)
:
Dia 1.0 -1.2mm
Zirconox : ZrO2CeO2 (Jyoti)
:
Dia 1.2 -1.7mm
YTZ : ZrO2Y2O3 (Japan)
:
Dia 1.0mm
Mill Type Make
:
Vertical Lab Bead Mill, Union Process U.S.A.
Model
:
01-HDDM, High Speed Vertical Lab Bead Mill
Mill Container
:
High purity 99.5% Alumina
Mill capacity
:
500 cc Net Volume
Mill Agitator Speed
:
3000 RPM (9.45 m/s)
Material
:
Baryte Powder: 262 gm
Water
:
125 ml
Dispersant
:
30 ml
Ceramic Media
:
Quantity 315 ml
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:
P=
W1 - W2
x 100%
--------------
W1
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.
Graphical Representation of Wear Test Results
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
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.
