Sample assessment
Carbonyl iron was divided between two long treatment periods. Similar endpoints make measurement repeatability central to any duration-selection decision. The laboratory test record documents this preparation only; applying the method to another batch requires a matched trial.
Recorded objective
Compare samples processed for 12 and 24 hours; no numerical size limit is recorded.
Equipment and selection
The recorded planetary machine is XQM. The corresponding TENCAN family is the Vertical Planetary Ball Mill. The jar volume identifies the test container and does not establish an exact machine variant or production capacity. Equipment association follows the recorded machine designation.
Test setup
| Recorded planetary machine | XQM |
|---|---|
| Documented setup | 1 L zirconia jar with standard zirconia balls; recorded charge 1061 g; dry milling; speed setting 500. |
| Recorded operating cycle | Run 5 / pause 1; units not stated in mode field |
Speed values are reproduced as recorded settings. A rotational unit and planetary-disc versus jar-speed basis are not stated, so these numbers are not labelled rpm.
Recorded procedure and results
The 12-hour preparation measured D50 = 5.02 µm and D90 = 7.93 µm. The 24-hour preparation measured D50 = 4.97 µm and D90 = 7.98 µm. The source describes separate portions for the two durations and gives no independent feed distribution.
Interpretation
The distributions were similar at the two endpoints: D50 was slightly lower at 24 hours while D90 was slightly higher. That small mixed difference is not evidence that doubling the time improved the whole distribution. No adverse processing outcome is reported.
Practical precautions
Use matched sample portions and the same analytical dispersion to evaluate repeatability before choosing a duration. Review oxidation, wear and thermal effects separately, since those properties were not measured in this comparison.
TENCAN alternatives to evaluate
For follow-up comparison, consider the TENCAN Omnidirectional Planetary Ball Mill. For carbonyl iron, a matched QXQM trial can test whether changing orientation affects the carbonyl-iron distribution across the two durations. Keep sample mass, media and sampling times controlled. This is a proposed comparison; the test record does not demonstrate a superior result for that alternative. Confirm jar compatibility and the permitted complete loaded mass before selecting a configuration.
Procedure records XQM; related product is the corresponding tested machine family. Exact variant is not inferred from jar size.
About this trial
TENCAN laboratory trial, 2023. Observations above come from this experimental record; selection considerations and proposed comparisons are engineering interpretation. Results apply to this sample and recorded conditions.