Date recorded: May 16 2017

Duration: 01 hours 00 minutes 28 seconds

In this presentation, we explore the practical aspects of sieving method – the advantages and disadvantages. We will also compare the method to other techniques such as laser diffraction indicating the increased wealth of information that can be obtained with these more modern instrumental techniques.
Table of contents
1. Welcome
00:13
2. Introduction
01:27
3. A comparison of sieves and laser diffraction for particle size analysis
01:04
4. Abstract
00:49
5. Outline
00:52
6. They’re not the same are they?
02:12
7. Sieves – factors that play a role
01:24
8. Diffraction – factors that play a role
00:59
9. Grizzly Isle of Mull January 1999
00:47
10. All retained particles are considered the same (> 1”)
01:07
11. Sieves
00:57
12. Sieves
00:05
13. Why laser diffraction?
02:34
14. Laser diffraction – what are we measuring?
00:55
15. Measurement principle
01:27
16. Untitled
00:05
17. Halo around moon http://apod.nasa.gov/apod/ap030421.html
00:36
18. Size of droplets
01:19
19. Laser diffraction - disadvantages?
00:05
20. Variation of scattering angle with particle size
01:17
21. Iteration - the fit
00:57
22. Shape and laser diffraction
02:12
23. Laser diffraction and screen - resolution
01:43
24. Extremes of distributions
01:34
25. Continuous – discontinuous Sieve display as histogram!
00:39
26. Continuous – discontinuous Laser diffraction display as histogram
01:00
27. x100 – ISO13320:2009
00:35
28. Sieving - a common question
00:42
29. Sieving - a common question – 100 mm cubeSquare mesh screen
01:22
30. This particle will also pass the screen
01:14
31. Sieving – 100 mm cube particle twice the densitySquare mesh screen
00:56
32. Maximum dimension of a unit cube
00:23
33. What will/may a square screen pass?
00:42
34. Sieving - a common question
00:31
35. Sieving – shape dependence
00:44
36. Circular holes?
00:22
37. Sieves: calibration and verification
01:00
38. Cement (from NIST SP260-176)
00:40
39. Laser diffraction: calibration and verification
01:12
40. Cement
00:18
41. Sieves – resolution
00:29
42. Sieves - tolerance
01:32
43. In case you think that this is old and outdated..
00:05
44. NBS-1003cMeasured by sieves, diffraction and EZS
01:03
45. NBS-1003cMeasured by sieves, diffraction and EZS
00:14
46. NBS-1003cSieves – reproducibility - statistics – AFR calculations
00:44
47. NBS-1003cLaser diffraction – reproducibility - statistics – AFR calculations
00:34
48. Comparison of techniques – buyer beware!
02:09
49. Powder coatingFinal sieve set to 100mm2-bar pressure
00:25
50. Powder coatingFinal sieve set to 150mm1.5-bar pressure
00:37
51. Sieves - Ibuprofen
00:15
52. Sieves - Ibuprofen
00:26
53. Sieves - Ibuprofen
00:29
54. Sieving
00:27
55. So where did that quote really originate?
00:44
56. AIME March 1907 No 14
00:50
57. Notoriously inaccurate method
00:40
58. Route forward
02:14
59. Useful references
00:06
60. Past webinar
00:25
61. Thank you!
00:18
62. Thank you for your attentionAny questions?
05:51
63. Contact Information
00:51