Fundamental investigations for the design of fluorine free mold powder compositions
Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
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Advances in Molten Slags, Fluxes, and Salts: Proceedings of the 10th International Conference on Molten Slags, Fluxes and Salts. ed. / Ramana G Reddy; Pinakin Chaubal; P.Chris Pistorius; Uday Pal. Seattle Washington USA, 2016. p. 299.
Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
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TY - GEN
T1 - Fundamental investigations for the design of fluorine free mold powder compositions
AU - Marschall, Irmtraud
AU - Yang, Xiao
AU - Harmuth, Harald
PY - 2016/5/22
Y1 - 2016/5/22
N2 - 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.
AB - 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.
KW - fluorine free
KW - mold powder
KW - crystallization
U2 - DOI: 10.1002/9781119333197.ch32
DO - DOI: 10.1002/9781119333197.ch32
M3 - Conference contribution
SP - 299
BT - Advances in Molten Slags, Fluxes, and Salts: Proceedings of the 10th International Conference on Molten Slags, Fluxes and Salts
A2 - Reddy, Ramana G
A2 - Chaubal, Pinakin
A2 - Pistorius, P.Chris
A2 - Pal, Uday
CY - Seattle Washington USA
T2 - The 10th international conference on molten slags, fluxes and salts
Y2 - 22 May 2016 through 25 May 2016
ER -