Investigations on the crystallisation of potassium molybdenum bronzes from flux melts
✍ Scribed by T. Aichele
- Publisher
- John Wiley and Sons
- Year
- 2007
- Tongue
- English
- Weight
- 167 KB
- Volume
- 42
- Category
- Article
- ISSN
- 0232-1300
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✦ Synopsis
Results are presented to identify the fields of primary crystallisation of red and blue potassium molybdenum oxide bronzes K 0.30 MoO 3 and K 0.33 MoO 3 in the ternary system K 2 MoO 4 -MoO 3 -MoO 2 . Starting from crystal growth experiments for the preparation of bronze crystals by electrolytic reduction the binary marginal systems K 2 MoO 4 -MoO 3 as well as MoO 3 -MoO 2 and further pseudo-binary sections have been investigated by differential thermo-analysis, hot-stage microscopy, and by quenching experiments under inert gas. We succeeded in determining phase transition temperatures in the binary section Mo 4 O 11 -K 2 Mo 2 O 7 . Temperature and composition ranges have been found in this section to crystallise red and blue potassium molybdenum oxide bronzes.