Open Access

Journal of Materials Research and Technology

, volume 19 , pages 866-876

Effect of Na2O on the sintering and melting behavior of CaO-SiO2-CaF2 slag

Funian Han ¹

Liang Yu ²

Guangrui Wen ¹

Jing Guo ¹

Chunhua Ran ²

Shaopeng Gu ³

Hide authors affiliations Show authors affiliations: 3 affiliations

College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China |

Electron Microscopy Center of Chongqing University, Chongqing University, Chongqing, 400044, China |

College of Metallurgy and Energy, North China University of Science and Technology, Tangshan, 063210, China |

Publication type: Journal Article

Publication date: 2022-07-01

Elsevier

Journal of Materials Research and Technology

scimago Q1

wos Q1

SJR: 1.318

CiteScore: 9.5

Impact factor: 6.6

ISSN: 22387854, 22140697

DOI: 10.1016/j.jmrt.2022.05.080

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Metals and Alloys

Surfaces, Coatings and Films

Ceramics and Composites

Biomaterials

Abstract

In this study, the effect of Na 2 O on the sintering and melting behavior of representative CaO-SiO 2 -CaF 2 slag were synthetically investigated by TG-DSC, DIL, XRD, SEM, XPS, and BET. As expected, most shrinkage of CaO-SiO 2 -CaF 2 slags with and without Na 2 O during the sintering process originated from solid-phase sintering, and the formation temperature of cuspidine as the sintering phase was reduced by Na 2 O to 550 °C. While Na 2 O also transformed Ca 4 Si 2 O 7 F 2 to Ca 2 NaSiO 4 F at 650 °C–880 °C and caused unexpected volume expansion, owing to increased cell volume and corresponding pore expansion. Moreover, Na 2 O reduced the melting point of CaO-SiO 2 -CaF 2 slag and promoted the volatilization of fluoride by changing the final phase before melting.

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GOST |

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GOST Copy

Han F. et al. Effect of Na2O on the sintering and melting behavior of CaO-SiO2-CaF2 slag // Journal of Materials Research and Technology. 2022. Vol. 19. pp. 866-876.

GOST all authors (up to 50) Copy

Han F., Yu L., Wen G., Guo J., Ran C., Gu S. Effect of Na2O on the sintering and melting behavior of CaO-SiO2-CaF2 slag // Journal of Materials Research and Technology. 2022. Vol. 19. pp. 866-876.

RIS |

Cite this

RIS Copy

TY - JOUR

DO - 10.1016/j.jmrt.2022.05.080

UR - https://doi.org/10.1016/j.jmrt.2022.05.080

TI - Effect of Na2O on the sintering and melting behavior of CaO-SiO2-CaF2 slag

T2 - Journal of Materials Research and Technology

AU - Han, Funian

AU - Yu, Liang

AU - Wen, Guangrui

AU - Guo, Jing

AU - Ran, Chunhua

AU - Gu, Shaopeng

PY - 2022

DA - 2022/07/01

PB - Elsevier

SP - 866-876

VL - 19

SN - 2238-7854

SN - 2214-0697

ER -

BibTex

Cite this

BibTex (up to 50 authors) Copy

@article{2022_Han,

author = {Funian Han and Liang Yu and Guangrui Wen and Jing Guo and Chunhua Ran and Shaopeng Gu},

title = {Effect of Na2O on the sintering and melting behavior of CaO-SiO2-CaF2 slag},

journal = {Journal of Materials Research and Technology},

year = {2022},

volume = {19},

publisher = {Elsevier},

month = {jul},

url = {https://doi.org/10.1016/j.jmrt.2022.05.080},

pages = {866--876},

doi = {10.1016/j.jmrt.2022.05.080}

}

Publisher

Elsevier

Journal

Journal of Materials Research and Technology

scimago Q1

wos Q1

SJR

1.318

CiteScore

9.5

Impact factor

6.6

ISSN

22387854 (Print, Electronic)

22140697

Profiles

J L Guo