A method for mounting, grinding and polishing very small laser-hit coal grains for microscopy and image analysis
✍ Scribed by Lee F. Brunckhorst
- Book ID
- 103092711
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 329 KB
- Volume
- 73
- Category
- Article
- ISSN
- 0016-2361
No coin nor oath required. For personal study only.
✦ Synopsis
Investigators at the Division of Coal and Energy Technology, CSIRO'*', have been looking at the combustion characteristics of very small monomaceral grains of coal by using a CO2 laser beam with very high heating rates (105"C s-'), with very rapid quenching in mid-burn. The particle is characterized petrologically before the burn, and the resulting chars are examined afterwards. These studies require the precise mounting, grinding and polishing of these very small partially pyrolysed char particles, 26 1.50 pm in size. A method has been developed to prepare individual grains within 10 min, with minimum loss (of grains) and a significant reduction of artefacts. The procedure, which is presented here, can be adapted to the preparation of other unusual samples, such as very thin fibres in axial or longitudinal section.