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The ternary system Na2O–ZnO–WO3: Compounds and phase relationships |
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| Authors: | Fengbo Yan Dagui Chen Wei Li Zhang Lin Zhenguo Zhao Liping Xue Feng Huang Jingkui Liang |
| Affiliation: | aState Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People's Republic of China bBeijing National Laboratory for Condensed Matter Physics, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, People's Republic of China cInternational Centre for Materials Physics, Chinese Academia Sinica, Shenyang 110016, People's Republic of China |
| Abstract: | The subsolidus phase relationships of ternary system Na2O–ZnO–WO3 have been investigated by X-ray diffraction (XRD) and differential thermal analyzer (DTA). All the samples were synthesized in the temperature range from 530 to 850 °C in air. There are one ternary compound and five binary compounds in the Na2O–ZnO–WO3 system, which can be divided into eight three-phase regions. The crystal structure of the ternary compound Na3.6Zn1.2(WO4)3 is determined by single-crystal structure analysis method. It belongs to triclinic system with space group and lattice constants a = 7.237 (5) Å, b = 9.172 (6) Å, c = 9.339 (6) Å and = 94.920 (4)°, β = 105.772 (9)°, γ = 103.531 (8)°, Z = 2. DTA analyses indicate that the compound Na2WO4 is not suitable to be the flux for ZnO crystal growth below 1250 °C, since no liquidus was observed in the system before 1250 °C. |
| Keywords: | ZnO–Na2O–WO3 system X-ray diffraction Phase relation DTA Na3.6Zn1.2(WO4)3 |
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