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Full Record for Micrograph 191
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- Micrograph no
- 191
- Brief description
- Dolomite (Ca,Mg)(CO3)2
- Keywords
- carbonate, ceramic
, dolomite, ore - Categories
- Ceramic
- System
- CaCO3-MgCO3
- Composition
- CaO 57, MgO 41 (wt%), + Fe2O3, SiO2 and Al2O3 (typical)
- Standard codes
- Reaction
- Processing
- As mined ore with some beneficiation
- Applications
- Used as an additive to control slag basicity in steelmaking and as source of doloma for refractories.
- Sample preparation
- Polished + etch in 5% HF for 30s.
- Technique
- Scanning electron microscopy (SEM) in backscattered electron imaging (BEI) mode
- Length bar
- 30 μm
- Further information
- The microstructure shows single phase equiaxed dolomite grains. Compare to the micrograph of doloma (ID 192) which shows 2-phases (MgO and CaO) formed after calcinations of the dolomite.
- Contributor
- Prof W E Lee
- Organisation
- Department of Engineering Materials, University of Sheffield
- Date
- 02/09/02
- Licence for re-use
Attribution-Non-Commercial-Share Alike 2.0 UK: England & Wales