|
Comparison of the
Wear Rates of Magnesia Stabilized Media
and Uniceram's YSZ Grinding Media
Grinding System:
Typical Planet Mill
Rotation Speed: 201 R.P.M.
Testing Time: 44 Hours
Mill Charge:
Note: MSZ
denotes Magnesia Stabilized Zirconia
|
Set A |
Set B |
|
Variables for Evaluation |
|
45 Pieces of 3/8” Cylinders of
MSZ Material |
45 Pieces of 3/8” Cylinders of
YSZ Material |
|
Constant Factors: Medium of the
Mill |
|
YSZ Grinding Media
Φ
6.5mm: 1 Kilo |
YSZ Grinding Media
Φ
6.5mm: 1 Kilo |
|
Alumina Powder: 180
gm |
Alumina Powder: 180
gm |
|
Water: 400 ml |
Water: 400 ml |
Procedure:
Set A is loaded into the media mill and
the mill is run continuously for 44 hours.
The mill is then emptied and the contents
are dried. The weight loss is then
measured with help of a sensitive scale.
The same procedure is repeated for Set B.
Since media mills are loaded on volume
basis, we have taken equal volumes of
media. Hence to determine wear rate, we
have to evaluate it as a part of the
initial weight and the time the mill was
run.
Results:
| |
Set A |
Set B |
|
Variable Contents for Evaluation |
45 pieces of 3/8” Cylinders of
MSZ Material |
45 pieces of 3/8” Cylinders of
YSZ Material |
|
Original Weight (gm) |
135.33 |
205.97 |
|
Final Weight (gm) |
131.36 |
204.93 |
|
Loss in Weight (gm) |
3.97 |
1.04 |
|
Wear Rate per Hour*
(gm/gm - hour) |
666.72 x 10-6 |
114.75 x 10-6 |
*Wear Rate
per Hour is evaluated by the following
equation:
Wear Rate =
(Original weight – Final Weight)
(Original Weight x Time)
Relative Wear
Rate of YSZ with reference to Magnesia
Stabilized Zirconia:
From the above results, it may be surmised
that Magnesia Stabilized Zirconia wears
about 6 times faster than Yttria
Stabilized Zirconia.
*Please note that
this is a typical test result and should
be only used for guidance. Individual
results may vary depending on various
application factors. |
