Determination of gibbs energy of formation of cuspidine (3Cao.2Sio 2.CaF2) by transpiration method

Hiroyuki Fukuyama; Hideki Tabata; Tadayuki Oshima; Kazuhiro Nagata

doi:10.2355/isijinternational.44.1488

Determination of gibbs energy of formation of cuspidine (3Cao.2Sio ₂.CaF₂) by transpiration method

Hiroyuki Fukuyama, Hideki Tabata, Tadayuki Oshima, Kazuhiro Nagata

Center for Mineral Processing and Metallurgy (CMPM)

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

The standard Gibbs energy change of the following reaction of cuspidine (3CaO · 2SiO₂ · CaF₂) with water vapor has been determined by a transpiration method as 3CaO · 2SiO₂ · CaF₂(s) - H₂O(g) = 2(2CaO · SiO ₂)(s)+2HF(g) Δ_rG°/kJ=265-0.116T (±16) (1 22<T/K<1 469) From this result, the standard Gibbs energy of formation of cuspidine has been evaluated as, ΔA_fG°(cuspidine)/kJ mor1^-1 = -5 178+0.813T(±19) (1 221<T/K<1 469) The constituent activities of the CaO-Si0₂-CaF₂ system and fluorine emission from the system at elevated temperatures have been evaluated based on the obtained thermodynamic data.

Original language	English
Pages (from-to)	1488-1493
Number of pages	6
Journal	Isij International
Volume	44
Issue number	9
DOIs	https://doi.org/10.2355/isijinternational.44.1488
Publication status	Published - 2004

Keywords

3CaO.2SiOCaF
CaO-SiO-CaF system
Cuspidine
Gibbs energy of formation
Mold powder
Transpiration method

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.2355/isijinternational.44.1488

Cite this

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title = "Determination of gibbs energy of formation of cuspidine (3Cao.2Sio 2.CaF2) by transpiration method",

abstract = "The standard Gibbs energy change of the following reaction of cuspidine (3CaO · 2SiO2 · CaF2) with water vapor has been determined by a transpiration method as 3CaO · 2SiO2 · CaF2(s) - H2O(g) = 2(2CaO · SiO 2)(s)+2HF(g) ΔrG°/kJ=265-0.116T (±16) (1 22<T/K<1 469) From this result, the standard Gibbs energy of formation of cuspidine has been evaluated as, ΔAfG°(cuspidine)/kJ mor1-1 = -5 178+0.813T(±19) (1 221<T/K<1 469) The constituent activities of the CaO-Si02-CaF2 system and fluorine emission from the system at elevated temperatures have been evaluated based on the obtained thermodynamic data.",

keywords = "3CaO.2SiOCaF, CaO-SiO-CaF system, Cuspidine, Gibbs energy of formation, Mold powder, Transpiration method",

author = "Hiroyuki Fukuyama and Hideki Tabata and Tadayuki Oshima and Kazuhiro Nagata",

year = "2004",

doi = "10.2355/isijinternational.44.1488",

language = "English",

volume = "44",

pages = "1488--1493",

journal = "Transactions of the Iron and Steel Institute of Japan",

issn = "0915-1559",

publisher = "Iron and Steel Institute of Japan",

number = "9",

}

TY - JOUR

T1 - Determination of gibbs energy of formation of cuspidine (3Cao.2Sio 2.CaF2) by transpiration method

AU - Fukuyama, Hiroyuki

AU - Tabata, Hideki

AU - Oshima, Tadayuki

AU - Nagata, Kazuhiro

PY - 2004

Y1 - 2004

N2 - The standard Gibbs energy change of the following reaction of cuspidine (3CaO · 2SiO2 · CaF2) with water vapor has been determined by a transpiration method as 3CaO · 2SiO2 · CaF2(s) - H2O(g) = 2(2CaO · SiO 2)(s)+2HF(g) ΔrG°/kJ=265-0.116T (±16) (1 22<T/K<1 469) From this result, the standard Gibbs energy of formation of cuspidine has been evaluated as, ΔAfG°(cuspidine)/kJ mor1-1 = -5 178+0.813T(±19) (1 221<T/K<1 469) The constituent activities of the CaO-Si02-CaF2 system and fluorine emission from the system at elevated temperatures have been evaluated based on the obtained thermodynamic data.

AB - The standard Gibbs energy change of the following reaction of cuspidine (3CaO · 2SiO2 · CaF2) with water vapor has been determined by a transpiration method as 3CaO · 2SiO2 · CaF2(s) - H2O(g) = 2(2CaO · SiO 2)(s)+2HF(g) ΔrG°/kJ=265-0.116T (±16) (1 22<T/K<1 469) From this result, the standard Gibbs energy of formation of cuspidine has been evaluated as, ΔAfG°(cuspidine)/kJ mor1-1 = -5 178+0.813T(±19) (1 221<T/K<1 469) The constituent activities of the CaO-Si02-CaF2 system and fluorine emission from the system at elevated temperatures have been evaluated based on the obtained thermodynamic data.

KW - 3CaO.2SiOCaF

KW - CaO-SiO-CaF system

KW - Cuspidine

KW - Gibbs energy of formation

KW - Mold powder

KW - Transpiration method

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