Table 1 Geometric mean diameter of beryllium powders and process-sampled particles

Material

Stage

D₅₀ (μm)

PCM

CCSEM

LPC

2

2.5

3.0 (1.8)

NP^B

1.5 (1.8)

3

1.7

2.7 (1.7)

NP

1.3 (1.5)

4

0.9

2.0 (1.5)

1.1 (1.9)

1.1 (1.6)

2

2.5

1.0 (1.3)

NP

1.1 (1.3)

3

1.7

1.2 (1.5)

NP

1.0 (1.3)

4

0.9

1.0 (1.4)

0.9 (1.5)

1.0 (1.3)

2

2.3

1.2 (1.6)

NP

--^C

3

1.5

1.1 (1.6)

NP

--

4

0.7

1.2 (1.6)

1.0 (1.9)

--

2

2.3

2.1 (1.9)

NP

1.1 (1.3)

3

1.5

1.9 (1.7)

NP

1.0 (1.3)

4

0.7

1.6 (1.7)

--^D

0.9 (1.3)