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Meeting 2025 TMS Annual Meeting & Exhibition
Symposium Materials Processing Fundamentals: Thermodynamics and Rate Phenomena
Presentation Title Novel approach to measure the thermodynamic property of tri-calcium phosphate using the phase relation in the CaO-SiO2-P2O5 ternary system
Author(s) Keijiro Saito, Kazuki Morita, Masakatsu Hasegawa
On-Site Speaker (Planned) Keijiro Saito
Abstract Scope Although several researchers reported the thermodynamic property of tri-calcium phosphate, their results exhibited large discrepancies, which could be a significant problem in material production. All previous studies were based on the CaO-P2O5 binary system, and their results for Ca3P2O8 include the inaccuracies originating from used thermodynamic data, e.g., Ca4P2O9 or phosphorus in reference metals. In contrast, this study focused on the CaO-SiO2-P2O5 ternary system as a novel approach. Oxide mixtures of Ca3P2O8+CaSiO3+SiO2 and Mg3P2O8+MgO were equilibrated with Cu-P alloys under an Ar+H2+H2O atmosphere. By combining thermodynamic data for CaSiO3 and Mg3P2O8, which were well assessed in the literature, the standard Gibbs energy of Reaction (1) was determined. P2(gas) + (5/2)O2(gas) + 3CaO(solid) = Ca3P2O8(solid) (1) Intrinsic systematic errors in the thermodynamic data for the Cu-P alloy would be canceled out in deriving Reaction (1) from the experiment with the two types of oxide mixtures.
Proceedings Inclusion? Planned:
Keywords Iron and Steel,

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A study of the time dependence of secondary phase formation
Analysis of circulation flow and mixing time in Ruhrstahl-Heraeus degasser with argon ladle bottom blowing through numerical modeling
Comparative Analysis of Commercial and Open-Source Software for Multiphase Flow Simulation in a Ladle Furnace Model
Comparative Study of Two Methodologies for the Analysis of the Thermal Evolution of Steel Slabs in a Reheating Furnace
Correlation of Bond Structures and Viscosity of Submerged Arc Welding Fluxes towards Shipbuilding Steels
EFFECT OF ARC TRANSIENTS ON FLOW IN VACUUM ARC REMELTING
Effect of Ladle Shroud Blockage on Flow Dynamics and Cleanliness of Steel in Coupled Ladle–Shroud–Tundish System
Effect of Stress, Temperature, and Langevin Friction on the Rate of Reaction in Dislocation Dipoles
Experimental and Computational Studies on Solid-State Dewetting of Single Crystal Nickel and Copper Thin Films
Exploring the Evolution of Steel Slag Chemistry: Foaming Properties
Fluid Dynamic Study of Flow Patterns Through the Implementation of a Swirl Nozzle in a Ladle Furnace
Improvement of Co-Ni-Re-Ti Mobility Descriptions in NIST Co-Ni Mobility Database
Metals extraction on Mars through carbothermic reduction: thermodynamic calculation and experimental result
Modeling Dynamic Burden Behavior in a Secondary Lead Reverberatory Furnace using Computational Fluid Dynamics
Mold simulator study of heat transfer behavior of medium carbon steel slag film inside continuous casting mold
Non-Metallic Inclusions in a High Manganese Steel Rail
Novel approach to measure the thermodynamic property of tri-calcium phosphate using the phase relation in the CaO-SiO2-P2O5 ternary system
Numerical modeling of SEN Depth on Heat Transfer, Fluid Flow and Solidification in Thin Slab Continuous Casting Mold
Numerical simulation of multiphase flow in a Single Snorkel Refining Furnace with dual injections of argon gas for the degassing process.
Numerical Simulation of Stirring Coil System for Use in the Steel Refining Ladle
Optimization of Rotary Kiln in Molybdenite Concentrate Oxidation for Molybdic Trioxide Production
Predicting Blast Furnace Raceway Dynamics Using Coupled Computational Fluid Dynamics-Discrete Element Method
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Study of the Heating System of a Metallurgical Crucible Through Experimentation and Numerical Simulation
Study of Transient Thermo-fluid Model of Meniscus Behavior in Continuous Casting Mold by Navier-Stokes-Cahn-Hilliard equation
Study on the Interaction between RH Refining Slag Performance and Refractory Material of Insertion Tube
Study on the mechanism of slag-sticking in the insertion tube of high carbon steel RH refining process
The Oscillating Drop’s Sensitivity to Thermophysical Properties of the Melt and Flow Conditions in Electromagnetic Levitation Experiments
Thermodynamic Analysis of Solid-State Reduction of Electric Arc Furnace Dust with Methane-Hydrogen Mixtures
Thermodynamic equilibria of yttrium and sulfur in liquid iron
Three dimensional effects in the dendritic growth competition of bi-crystals
Transient Evolution of Slag Droplets during Slab Continuous Casing Process
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