Re: Tapped Density Of Leadoxydes
the tapped density result can be affected by the state of the sample before the tapping, so where the powder has been transported it may be compacted together already and hence you may get a different result when testing.
Other things may affect it -
moisture pick up (and subsequent compaction during handling),
break up of particles during transportation and handling,
segregation of particles - so the customer may be testing the tapped density of a non-representative sample of the powder when they test e.g. they test a sample that contains large particles due to separation during transit - then they will get a different result to you
Are you doing this test to allow some measurement of the flow properties of the powder so the customer knows how to handle/process it? There are alternatives available, send me an e-mail and I can explain a bit more: ben@merrowscientific.com
Regards
Ben ■
Tapped Density of Leadoxydes
Hello
We are a producer of leadoxides. One quality parameter of these materials is the tapped density. We analyse this direct after the production. The leadoxide (grainsize < 20µm) is packed into container each 1700kg. Each container ist tested. After a few days the material is filled (12 Containers) into a silo truck. When the silo truck arrives at the customer, very often the result of the tapped density is as different as the results from us. Additional to this, the measurement system analyses of the method of tapped density is very bad. Why? The measurement methode shows very easy.
Can anybody tell us influences of the measurement of the tapped density.
Thank you for answer! ■