44MR | APPO | AVPS | AVSC | BDGC | BDLB | BLOI | BWIW | CCON | CDRY | CEC | CLWC | CMST | COLE | COVB | CSSS | DENS | DFAC | DFDM | DIEL | DNLP | DS | DSHR | DSRN | DSTR | DTMP | EBCT | EM20 | FRFU | FRRD | FRTG | FSHR | FSTR | GBMF | GEBR | GLAZ | GLFL | GLHD | GLLE | GSPT | GTTM | HDMI | HEGF | HMA | HMAN | HMOH | IFP | IWCT | L10M | L1M | | L2M | L30M | L5 | L5M | LDW | LOI | LQLM | MDPS | MLRG | MOIP | MOR | MOR5 | MORD | OLAD | P200 | P325 | PBPO | PCE | pHPG | pHPW | PPD | PRSM | PSHP | RC | RHEO | SADR | SAMG | SCLE | SHAB | SIEV | SLBY | SOLU | SPHC | SSAB | SVWT | TGA | THCO | TNST | TREL | TRMN | TSFL | UPSD | WABS | WOPL | WRA | WSR | XREF

L20M - % < 20 microns Test

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

Variables

VAL - Value (V)

Related Information

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. We use the SIEV test to log results.

Links

Tests Average Particle Size (Microns)
Tests % < 10 microns
Tests % < 30 microns
Glossary Ultimate Particles
Utlimate particles of ceramic materials are finer than can be measured even on a 325 mesh screen. These particles are the key players in the physical presence of the material.
Typecodes Particle Tests
Tests conducted to determine particle populations, sizes, shapes, densities, surface areas, etc.

By Tony Hansen


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