Fundamental investigations for the design of fluorine free mold powder compositions

Publikation: Beitrag in Buch/Bericht/KonferenzbandBeitrag in Konferenzband


The influence of the CaO/SiO2 ratio on flux viscosity at 1300°C, break temperature and crystallization was investigated.
The thermo-chemical software FactSage was used for the calculation of the viscosity, the equilibrium phase content and the liquidus temperature. Based on these results, two sample series with 8.8 wt% TiO2, 5 wt% B2O3 and CaO/SiO2 ratios from 0.8-1.2 were manufactured. Series M1 contained Li2O which was replaced by a higher content of Na2O for F-free mixtures in series M2. The viscosity and break temperature were determined through rotational viscometry, the crystallization temperature and crystalline fraction by a so called Furnace Crystallization Test, a macro style differential thermal analysis which enables a mineralogical investigation of the samples afterwards.
The experiments exhibited that the break temperature, the liquidus temperature and the crystalline fraction rose with increasing C/S ratio while the viscosity decreased for both sequences.
TitelAdvances in Molten Slags, Fluxes, and Salts: Proceedings of the 10th International Conference on Molten Slags, Fluxes and Salts
Redakteure/-innenRamana G Reddy, Pinakin Chaubal, P.Chris Pistorius, Uday Pal
ErscheinungsortSeattle Washington USA
ISBN (elektronisch)978-1-119-30876-8
PublikationsstatusVeröffentlicht - 22 Mai 2016
VeranstaltungThe 10th international conference on molten slags, fluxes and salts - Seattle, USA / Vereinigte Staaten
Dauer: 22 Mai 201625 Mai 2016


KonferenzThe 10th international conference on molten slags, fluxes and salts
KurztitelMOLTEN 2016
Land/GebietUSA / Vereinigte Staaten


  • fluorine free
  • mold powder
  • crystallization

Dieses zitieren