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% < 20 microns - L20M

This test procedure was employed in the Foresight Ceramic Database and now is available for those having an account at Insight-Live.com. Accumulating test data using the variables defined in these procedures enables us to create tools that enable you to compare the physical properties of materials and recipes.

Notes

The percentage of a material powder whose absolute particles are smaller than 20 microns.

Variables

VAL - Value (V)

A root-of-two series of test sieves

A root-of-two series of test sieves

The coarsest screen is at the top, the finest on the bottom. The opening for each is shown on the label. They are chosen such that each successive screen going down has an opening that is about half the area of the one above it. Using this series you can produce a practical measurement of the distribution of particle sizes in ceramic materials and bodies used in traditional ceramics (structural products industries, like brick, measure coarser particles than this, starting at perhaps 10 mesh and ending at 70). The 325 screen on the bottom is only used sometimes, it is difficult to finer-that-325 particles to pass through it because it blinds. It is not possible to shake powder through sieves that are this fine, samples must be washed through.

Out Bound Links

  • (Glossary) Ultimate Particles

    Processed ceramic materials are typically ground to 200 mesh and feel very fine to the touch. With some you can detect some particle grains between your fingers. The amount of these "physical particles" can be measured by washing or shaking the ceramic powder through a sieve. Using water washing and...

  • (Typecodes) 5: PTT - Particle Tests

In Bound Links

  • (Tests) AVPS - Average Particle Size (Microns)
  • (Tests) L10M - % < 10 microns
  • (Tests) L30M - % < 30 microns

By Tony Hansen




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