Experimental Determination of Phase Equilibria in the REM2O3-SiO2 (REM = Y/Yb/La) Systems at Elevated Temperature

Longgong Xia; Dmitry Sukhomlinov; Fengchun Ye; Zhihong Liu; Pekka Taskinen

doi:10.1007/s11837-020-04473-1

Experimental Determination of Phase Equilibria in the REM₂O₃-SiO₂ (REM = Y/Yb/La) Systems at Elevated Temperature

Longgong Xia
, Dmitry Sukhomlinov
, Fengchun Ye
, Zhihong Liu^*
, Pekka Taskinen

^*Corresponding author for this work

Department of Chemical and Metallurgical Engineering

Central South University
Norwegian University of Science and Technology
Jiangxi Huagan Nerin Rare and Precious Metal Technology Co., Ltd.

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

6 Citations (Scopus)

100 Downloads (Pure)

Abstract

Phase relations in the REM₂O₃-SiO₂ (REM = Y/Yb/La) systems have been studied using the equilibration/quenching/scanning electron microscopy (SEM)-electron probe microanalysis (EPMA) technique. The solvus and liquidus between 1400°C and 1650°C have been determined. The results obtained in this study show that a maximum of 0.57 wt.% Yb₂O₃ can dissolve in SiO₂ phase, while the maximum solubility of La₂O₃ and Y₂O₃ in SiO₂ phase was 0.22 wt.% and 0.07 wt.%, respectively. Correspondingly, SiO₂ shows low solubility in La₂Si₂O₇, and nearly does not dissolve in Y₂Si₂O₇ or Yb₂Si₂O₇. No liquid phase was detected in the Y₂O₃-SiO₂ or Yb₂O₃-SiO₂ system in the temperature range of interest. One oxide liquid phase comprising 39.27 wt.% SiO₂ and 59.07 wt.% La₂O₃ was found in the La₂O₃-SiO₂ system sample equilibrated at 1653°C, revealing that the eutectic point temperature between La₂Si₂O₇ and SiO₂ is located between 1600°C and 1653°C. Results of this study were compared with previous observations, revealing significant differences.

Original language	English
Pages (from-to)	63-71
Number of pages	9
Journal	JOM
Volume	73
Issue number	1
Early online date	17 Nov 2020
DOIs	https://doi.org/10.1007/s11837-020-04473-1
Publication status	Published - Jan 2021
MoE publication type	A1 Journal article-refereed

Funding

The research was financially supported by the National Solid Waste Project (No. 2018YFC1902503) and Major Projects in Jiangxi Province (No. S2016YFSFG0009). The authors acknowledges the Analytical Center in Australia National University for EPMA analysis of the specimens. Mr. Chen JianBo’s help with the experiments is also warmly acknowledged.

Access to Document

10.1007/s11837-020-04473-1

CHEM_Xia_et_al_Experimental_determination_of_phase_equilibria_JOMAccepted author manuscript, 1.88 MB

Cite this

@article{8f7ca0a609ca400a96f78e74b8e3e427,

title = "Experimental Determination of Phase Equilibria in the REM2O3-SiO2 (REM = Y/Yb/La) Systems at Elevated Temperature",

abstract = "Phase relations in the REM2O3-SiO2 (REM = Y/Yb/La) systems have been studied using the equilibration/quenching/scanning electron microscopy (SEM)-electron probe microanalysis (EPMA) technique. The solvus and liquidus between 1400°C and 1650°C have been determined. The results obtained in this study show that a maximum of 0.57 wt.\% Yb2O3 can dissolve in SiO2 phase, while the maximum solubility of La2O3 and Y2O3 in SiO2 phase was 0.22 wt.\% and 0.07 wt.\%, respectively. Correspondingly, SiO2 shows low solubility in La2Si2O7, and nearly does not dissolve in Y2Si2O7 or Yb2Si2O7. No liquid phase was detected in the Y2O3-SiO2 or Yb2O3-SiO2 system in the temperature range of interest. One oxide liquid phase comprising 39.27 wt.\% SiO2 and 59.07 wt.\% La2O3 was found in the La2O3-SiO2 system sample equilibrated at 1653°C, revealing that the eutectic point temperature between La2Si2O7 and SiO2 is located between 1600°C and 1653°C. Results of this study were compared with previous observations, revealing significant differences.",

author = "Longgong Xia and Dmitry Sukhomlinov and Fengchun Ye and Zhihong Liu and Pekka Taskinen",

year = "2021",

month = jan,

doi = "10.1007/s11837-020-04473-1",

language = "English",

volume = "73",

pages = "63--71",

journal = "JOM",

issn = "1047-4838",

publisher = "Springer",

number = "1",

}

TY - JOUR

T1 - Experimental Determination of Phase Equilibria in the REM2O3-SiO2 (REM = Y/Yb/La) Systems at Elevated Temperature

AU - Xia, Longgong

AU - Sukhomlinov, Dmitry

AU - Ye, Fengchun

AU - Liu, Zhihong

AU - Taskinen, Pekka

PY - 2021/1

Y1 - 2021/1

N2 - Phase relations in the REM2O3-SiO2 (REM = Y/Yb/La) systems have been studied using the equilibration/quenching/scanning electron microscopy (SEM)-electron probe microanalysis (EPMA) technique. The solvus and liquidus between 1400°C and 1650°C have been determined. The results obtained in this study show that a maximum of 0.57 wt.% Yb2O3 can dissolve in SiO2 phase, while the maximum solubility of La2O3 and Y2O3 in SiO2 phase was 0.22 wt.% and 0.07 wt.%, respectively. Correspondingly, SiO2 shows low solubility in La2Si2O7, and nearly does not dissolve in Y2Si2O7 or Yb2Si2O7. No liquid phase was detected in the Y2O3-SiO2 or Yb2O3-SiO2 system in the temperature range of interest. One oxide liquid phase comprising 39.27 wt.% SiO2 and 59.07 wt.% La2O3 was found in the La2O3-SiO2 system sample equilibrated at 1653°C, revealing that the eutectic point temperature between La2Si2O7 and SiO2 is located between 1600°C and 1653°C. Results of this study were compared with previous observations, revealing significant differences.

AB - Phase relations in the REM2O3-SiO2 (REM = Y/Yb/La) systems have been studied using the equilibration/quenching/scanning electron microscopy (SEM)-electron probe microanalysis (EPMA) technique. The solvus and liquidus between 1400°C and 1650°C have been determined. The results obtained in this study show that a maximum of 0.57 wt.% Yb2O3 can dissolve in SiO2 phase, while the maximum solubility of La2O3 and Y2O3 in SiO2 phase was 0.22 wt.% and 0.07 wt.%, respectively. Correspondingly, SiO2 shows low solubility in La2Si2O7, and nearly does not dissolve in Y2Si2O7 or Yb2Si2O7. No liquid phase was detected in the Y2O3-SiO2 or Yb2O3-SiO2 system in the temperature range of interest. One oxide liquid phase comprising 39.27 wt.% SiO2 and 59.07 wt.% La2O3 was found in the La2O3-SiO2 system sample equilibrated at 1653°C, revealing that the eutectic point temperature between La2Si2O7 and SiO2 is located between 1600°C and 1653°C. Results of this study were compared with previous observations, revealing significant differences.

UR - https://www.scopus.com/pages/publications/85096104745

U2 - 10.1007/s11837-020-04473-1

DO - 10.1007/s11837-020-04473-1

M3 - Article

AN - SCOPUS:85096104745

SN - 1047-4838

VL - 73

SP - 63

EP - 71

JO - JOM

JF - JOM

IS - 1

ER -

Experimental Determination of Phase Equilibria in the REM₂O₃-SiO₂ (REM = Y/Yb/La) Systems at Elevated Temperature

Abstract

Funding

Access to Document

Other files and links

Fingerprint

Cite this