Supplement; Recommended Combinations Of Shaking Flasks An Grinding Balls; Basic Analysis Of Materials For Shaking Flasks And Grinding Balls; Materials And Characteristics - Sartorius Mikro-Dismembrator U Bedienungsanleitung

6

Supplement

6.1

Recommended Combinations of Shaking Flasks an Grinding Balls

Shaking flasks
Grinding balls
PTFE with steel core
quartz agate
Chromium steel
Tungsten carbide
= optimum combination
6.2

Basic Analysis of Materials for Shaking Flasks and Grinding Balls

6.2.1 Materials and Characteristics

Material
PTFE
stainless steel
Chromium steel
Tungsten carbide
quartz agate
Stainless steel
--
= possible combination
Chemical composition, special notes
high purity PTFE, very low resistant to abrasion;
suitable for trace element analysis; not recommended for abrasive
samples
steel classific. 1.4301; corrosion resistant, X5CrNi 1810
(acc. to DIN 17440), medium resistant to abrasion;
composition: Fe = 68%, C = 0,07%, Si = 1,0%, Mn = 2,0%, Cr = 17-
20%, Ni = 8,5-10%
specific weight 7,85 g/ cm
composition: Fe = 86%, C = 1,5%, Cr = 12%, trace ingredients of W, Mo
or V
Specific weight 14,75 g/cm
resistant to abrasion;
composition: C = 5,7 - 5,8%, Co = 5,6 - 6%, Ti+Ta = 0,7 - 1%,
Fe < 0,1%
Brazilian agate of spec. weight: 2,6 g/cm
ray fluorescent assays and trace element analysis;
highly resistant to abrasion;
composition: SiO = 99,91%, Al
2
0,01%, K O = 0,01%, MnO = 0,01%, CaO = 0,01%, MgO = 0,01%
2
PTFE
3
, medium resistant to abrasion;
3
, well suited for abrasive samples; high
3
, well suitet for IR-, UR, and X-
O = 0,02%, Na O = 0,02%, Fe
2 3 2
0 =
2 3
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