| 00:00:00 | Welcome |
| 00:00:14 | Introduction |
| 00:00:55 | Controlling powder bulk density by optimizing particle size and shape distribution |
| 00:01:21 | Abstract |
| 00:01:50 | Amazing fact # 99 |
| 00:02:47 | Obligatory Opening Quotation (O2Q) |
| 00:04:31 | Obligatory Opening Quotation (O2Q) - 2 |
| 00:04:44 | Format |
| 00:05:36 | Caution |
| 00:08:04 | Tableting (Am. spelling) |
| 00:10:42 | Plastic flow or brittle fracture? |
| 00:11:10 | Plastic flow or brittle fracture? |
| 00:12:54 | Dry/direct compaction |
| 00:13:27 | Dry/direct compaction - disadvantages |
| 00:14:07 | Factors influencing dispersion rheology |
| 00:14:55 | Particle size |
| 00:16:25 | Effect of particle size on viscosity |
| 00:17:16 | Particle size distributions |
| 00:18:30 | Particle size distribution |
| 00:19:08 | Effect of particle size distribution on viscosity |
| 00:20:04 | Effect of particle shape on viscosity |
| 00:20:09 | Effect of particle shape on viscosityShear thinning |
| 00:20:57 | Effect of particle size on tablet strength* |
| 00:21:38 | Key factors: particle size and shape |
| 00:22:36 | Ideal material |
| 00:24:09 | Effects of physical properties for starch acetate powders on tableting* |
| 00:24:37 | Ceramics |
| 00:25:00 | Ceramics – the challenge |
| 00:26:07 | Strength of materials |
| 00:27:24 | Propagation of cracks |
| 00:27:29 | Propagation of cracks – after Somasundaran |
| 00:28:42 | Useful paper |
| 00:30:20 | This leads to the comminution limit (CL) |
| 00:31:43 | And a slide I’ve used a lot…based on Kevin Kendall |
| 00:32:31 | And why are cracks important? |
| 00:33:27 | Agglomeration |
| 00:34:02 | Sintered metal components – powder metallurgy |
| 00:34:07 | Sintering time – Herring’s equation |
| 00:34:12 | Effect of shape |
| 00:34:58 | Effect of shape |
| 00:35:44 | Penrose tiling |
| 00:36:27 | Escher – my favorite (mathematical) artistAngels and Demons |
| 00:36:54 | The challenge |
| 00:37:07 | High strength materials |
| 00:38:12 | Pittcon 2014 & 2015 – a 3-D problemHow many candies in the jar? (10159 actually) |
| 00:38:39 | Important properties - particle size distribution |
| 00:39:13 | Adapted from PietschW Pietsch “Size enlargement by agglomeration” John Wiley & Sons (1999) |
| 00:40:22 | Pietsch (continued) |
| 00:40:50 | Dinger-Funk equation |
| 00:41:47 | Ideal particle size distribution – plotted on log-log paper |
| 00:42:05 | Here’s my D-F plots for the Mastersizer 3000 |
| 00:42:32 | Packing density |
| 00:43:35 | More applications you may not have considered |
| 00:44:27 | First, some more theory |
| 00:44:32 | Kyrylyuk – Slide 26 |
| 00:45:11 | Kyrylyuk – Slide 27 |
| 00:45:42 | Kyrylyuk – Slide 34 |
| 00:46:02 | Jean-Louis SalagerUniversidad de Los AndesMérida, Venezuela |
| 00:46:59 | Chapter by Piet Stroeven & Huan He |
| 00:47:25 | Asphalt/bitumen |
| 00:47:49 | References |
| 00:48:46 | References |
| 00:49:29 | Thank you! |
| 00:50:22 | Thank you for your attentionAny questions? |
| 00:53:53 | Contact Info |
Bulk density is a property of particulate matter including powders, granules or larger aggregates and is a measure of the weight per unit volume of a collection of particles. The control of bulk density is important for a variety of reasons.
For example, the compression conditions for a pharmaceutical tablet and the porosity of a ceramic green body are related to powder bulk density as are packaging requirements for storage or transport of a powder mass.
Powder particle size and shape distributions govern how particles can and will pack together and hence will influence a powders bulk density. The presence of voids and agglomerates also affect bulk density and can lead to areas of weakness in a structure (such as ceramics and sintered metal components) that industries aim to minimize by careful control of size and shape distributions.
This webinar explores the packing of materials from a semi-theoretical aspect leading onto the factors that lead to optimum packing of denser structures in the ceramics (size, shape, zeta potential) and sintered metal powder compaction industries.
For example, the compression conditions for a pharmaceutical tablet and the porosity of a ceramic green body are related to powder bulk density as are packaging requirements for storage or transport of a powder mass.
Powder particle size and shape distributions govern how particles can and will pack together and hence will influence a powders bulk density. The presence of voids and agglomerates also affect bulk density and can lead to areas of weakness in a structure (such as ceramics and sintered metal components) that industries aim to minimize by careful control of size and shape distributions.
This webinar explores the packing of materials from a semi-theoretical aspect leading onto the factors that lead to optimum packing of denser structures in the ceramics (size, shape, zeta potential) and sintered metal powder compaction industries.