The determination of 3D phase diagrams of the Cu2Ox-ZnO-SiO2 system

Longgong Xia, Zhihong Liu, Pekka Taskinen

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review


The smelting of Zn-bearing materials will produce high ZnO content slags, and the monitoring of slag properties has significant importance for the smelter. Phase diagrams can provide road maps in optimizing metallurgical processing parameters. The determination of phase diagrams in multicomponent
oxide systems needs sufficient experimental data. However, thermodynamic information of ZnO rich slags is incomplete in the literature. Therefore, systematic work has been performed to determine the phase relationships in the Cu-O-ZnO, Cu-O-SiO2, ZnO-SiO2, and Cu-OZnO-SiO2 systems in previous studies. Both liquidus temperatures and the solid solubility data have
been collected.
The equilibration/quenching/EDS technique has been applied in determining the eutectic point of the Cu-O-ZnO-SiO2 system. The technique used in this study involved preparation of a synthetic pellet of predetermined composition. The pellet placed in a suitable container was then equilibrated at the target temperature for certain period of time, followed by rapid quenching, so that the phase assemblages at high temperatures were frozen instantly. The compositions of all phases in equilibrium were measured by EDS from the polished sections.
All the results from the present study and previous studies have been used in constructing the 3D version of ternary phase diagrams of the Cu2Ox-ZnO-SiO2 system. The results of the present study will provide novel information and both for fundamental scientific research and industrial practices.
Original languageEnglish
Title of host publicationProceedings of EMC 2017
Place of PublicationClausthal-Zellerfeld
PublisherGDMB Verlag GmbH
Number of pages12
ISBN (Print)978-3-940276-74-2
Publication statusPublished - 2017
MoE publication typeA4 Article in a conference publication
Event European Metallurgical Conference - Leipzig, Germany
Duration: 25 Jun 201728 Jun 2017
Conference number: 9


Conference European Metallurgical Conference
Abbreviated titleEMC


  • Liquidus, Solubility, Zinc bearing materials, Pyrometallurgy, Slag, Equilibrium

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