Plan a trial for your application
Thermal interface potting compounds
Disperse at equal volume fraction. Record pourable working time, mixed viscosity and thermal conductivity after cure.
Thermally conductive pads
At the same pad thickness and compression, compare thermal resistance and electrical insulation. Distinguish powder data from pad performance.
Purchase specifications and incoming inspection
Include the intended grade or current specification in the enquiry. Use the table to compare selection criteria and inspection conditions. The specification agreed by both parties defines the contractual limits. Denka · DAM series spherical alumina: size and applications ↗
| Property | Unit | Published or agreed specification | Test conditions and checks |
|---|---|---|---|
| Median particle size D50 | µm | Denka DAM-45 third-party typical value 42.8 | Request coarse-end particle size and its measurement method. Select against the actual filling gap. |
| Specific surface area | m²/g | Denka DAM-45 typical value: 0.2. | Match adsorption method and pretreatment before comparing results. |
| Thermal conductivity of the filled material | W/(m·K) | Confirm the customer’s target for the finished composite. | Keep resin, filler volume fraction, specimen density and temperature constant. |
When approving a sample, record the grade, methods, limits and specification revision. On receipt, match the packing lot number to the lot-specific COA and record the measured values and release decision.
From samples to commercial delivery
Packaging and receiving
Check surface treatment and moisture-resistant inner bags. Mark coarse and fine grades with size range and lot.
Storage and handling
For thin parts, agree a maximum particle size and foreign-matter check. Retain the full incoming size distribution.
Sample and order lead times
Specify colour code, surface treatment or filler grade and whether a single lot is required. Confirm trial quantity, MOQ, retention across lots and arrival.
Questions from the plant
What if increasing filler content makes the compound too viscous?
Compare flow, thermal conductivity and settling in the same resin at defined volume fractions.
Why do potting compounds scratch or block at equal D50?
Check the coarse tail, sieve residue and equipment clearance. Record agglomerates and viscosity before and after filtration.
Report a delivery or batch issue
Include the order number, lot number from the package, label photos and inspection records for the affected lot. When retesting, check Particle size distribution, sphericity, Surface treatment.
Request documents for your application
TDS · Technical data sheet
For grade selection and sample approval, specify the grade and revision required.
SDS · Safety data sheet
Specify the country or region of use and the required language.
COA · Certificate of analysis
Request a sample COA during supplier review. For incoming inspection, provide the actual lot number.