Corundum grinding ball

Alumina ceramic media for compatible nonmetallic powder processing, mixing and dispersion.

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Overview

Alumina ceramic media for compatible nonmetallic powder processing, mixing and dispersion. Select the alumina grade and diameter rather than treating every white ceramic ball as equivalent.

How it works

The grinding media forms part of the contact system between sample, media and mill. Material selection should balance the required mechanical action with chemical compatibility and the acceptable contribution from wear.

Alumina wear can contribute aluminium. Material hardness does not establish the operating temperature of a complete milling setup.

Key features

The catalog lists a broad 0.5–50 mm reference diameter range.
Density depends on the supplied material grade.
Assess alumina transfer and media wear using the actual jar and sample.

Specifications

Published catalog references are reproduced below. Nominal volume is not a sample-mass rating. Confirm the selected model, material grade, electrical supply and complete supplied configuration in the quotation.

Published media material references
Property	Reference
Material	alumina (corundum)
Composition / grade	α-Al₂O₃ ≥90% (published grade reference)
Diameter range	0.5–50 mm
Density	3.6–3.9 g/cm³
Hardness	Mohs 9
Supplied size distribution	Specify the required diameters and quantities
Grade / batch documentation	Confirm with the quotation; material references are not a batch certificate

Material properties are published references, not a certificate for a supplied batch or a complete assembly temperature/pressure rating.

Applications

Compatible ceramic raw materials, quartz, feldspar and refractory-material studies.

Suitability depends on the actual sample, process and analytical requirements; a listed application is not a guaranteed final-particle-size result.

Accessories and options

Specify the media grade, diameter mix, total charge and required documentation against the actual jar and sample. Confirm custom requirements in the quotation.

State the required grade, quantities, drawings and destination when requesting a quotation. Confirm what is included, the document requirements, packing and commercial terms; no generic delivery time or universal custom capability is assumed.

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Selection guidance

Match alumina (corundum) to the sample chemistry and the elements or residues that matter to the analysis. Then confirm the dimensions, complete loaded mass and operating arrangement against the selected mill.

Work through the selection guide · Request a configuration quotation

Trials and comparisons

Material/application reference

Alumina powder

XQM; exact model not recorded · Water-based wet milling

Sample: 100 g
Jar: 500 mL corundum jar; alumina media recorded
Recorded sampling / duration: 60 and 120 min samples

Recorded observations
Observation	Sampling time	D50 (µm)	D90 (µm)
Recorded sample 1	60 min	8.28	15.11
Recorded sample 2	120 min	5.19	10.90

Two starting grades appear in the entry, so no starting distribution is assigned to these measured samples. Jar/media grade, interruption history and measurement method are unspecified. This supports a material-level comparison of recorded time points, not proof of a premium-jar advantage.

How to plan a fair comparison

For a alumina (corundum) comparison, use matched sample portions and the same measurement/dispersion method. State the jar, media, mass/volume loading basis, processing schedule and contamination measurements. A change in material grade alone is not established as the cause of a result.

These anonymous records are not operating instructions. Measurement and dispersion methods are not fully specified in the test summaries; results apply to the reported samples and conditions.

Discuss a matched sample evaluation

Product FAQs

Can Mohs hardness be compared directly with a steel HRC value?

Mohs and Rockwell C are different hardness scales and are not directly interchangeable. Use the specified material grade and an appropriate test method when comparing ceramic and steel media.

Which alumina (corundum) ball diameter should I order?

The catalog diameter reference is 0.5–50 mm. Select diameters and the size mix around feed size, target result, jar volume and the chosen process. Alumina wear can contribute aluminium. Material hardness does not establish the operating temperature of a complete milling setup.

Can these balls replace another media material at the same mass?

The density reference for alumina (corundum) is 3.6–3.9 g/cm³. Equal mass does not give equal media volume when densities differ. Define the loading basis and review the total jar load before changing materials.

How should these balls be matched to a jar?

Check the jar working surface, media hardness/density, total loaded mass and sample chemistry. Alumina wear can contribute aluminium. Material hardness does not establish the operating temperature of a complete milling setup. A diameter that fits physically is not automatically an appropriate process choice.

Does the hardness value establish wear performance in my sample?

The published hardness reference is Mohs 9. Alumina wear can contribute aluminium. Material hardness does not establish the operating temperature of a complete milling setup. Assess wear with the actual sample, jar, loading and measurement method; hardness is not a sample-specific wear-rate result.

What grade and size information should I include in an inquiry?

Specify α-Al₂O₃ ≥90% (published grade reference), diameters within the 0.5–50 mm catalog reference, quantities and required grade/batch documents. Provide the actual jar, sample chemistry and contamination limits so TENCAN can review the pairing.

Start with your sample.

Nominal capacity, jar volume and usable sample load are different. Confirm the model, jars and electrical requirements with our engineers.

Choosing Jars and Grinding Media

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FOR YOUR MATERIAL?

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