The ternary system Na2O-ZnO-WO3: Compounds and phase relationships

The ternary system Na2O-ZnO-WO3: Compounds and phase relationships
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三元体系 Na2O-ZnO-WO3:化合物和相关系

DOI:
10.1016/j.jallcom.2007.04.024
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发表时间:
2008-06
影响因子:
6.2
通讯作者:
Li, Wei
Li, Wei
中科院分区:
材料科学2区
文献类型:
--
作者:
Zhao, Zhenguo;Huang, Feng;Lin, Zhang;Liang, Jingkui;Chen, Dagui;Xue, Liping;Yan, Fengbo;Li, Wei

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用X射线衍射(XRD)和差热分析(DTA)研究了Na_2 O-ZnO-WO_3三元体系的亚固相线相关系。所有样品在空气中在530至850°C的温度范围内合成。Na_2 O-ZnO-WO_3体系中有1个三元化合物和5个二元化合物,可分为8个三相区。用单晶结构分析方法测定了三元化合物Na3.6Zn1.2(WO 4)3的晶体结构。属三斜晶系,空间群P1,晶格常数a=7.237(5),B=9.172(6),c=9.339(6),α=94.920(4)°,β=105.772(9)°,γ=103.531(8)°,Z=2。差热分析表明,Na_2WO_4不适合作为ZnO晶体生长的助熔剂,因为在1250 °C之前体系中没有液相线。
The subsolidus phase relationships of ternary system Na2O–ZnO–WO3have 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–WO3system, which can be divided into eight three-phase regions. The crystal structure of the ternary compound Na3.6Zn1.2(WO4)3is determined by single-crystal structure analysis method. It belongs to triclinic system with space group P1¯ and lattice constants a=7.237 (5)Å, b=9.172 (6)Å, c=9.339 (6)Å and α=94.920 (4)°, β=105.772 (9)°, γ=103.531 (8)°, Z=2. DTA analyses indicate that the compound Na2WO4is not suitable to be the flux for ZnO crystal growth below 1250°C, since no liquidus was observed in the system before 1250°C.
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发表时间: 2000-06
影响因子: 1.8
作者:
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通讯作者: T. Sekiguchi;S. Miyashita;K. Obara;T. Shishido;N. Sakagami
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发表时间: 1964-01-01
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