Effect of magnesium and zinc on phase formation of pyrochlore-type Bi2Mg (Zn)1-XMxTa2O9.5-? (M-Cr, Fe) ceramics

被引：2
作者：
Zhuk, N. A. [1 ]
Makeev, B. A. [2 ]
Krzhizhanovskaya, M. G. [3 ]
Korolev, R. I. [1 ]
机构：
[1] Syktyvkar State Univ, Oktyabrsky Prospect 55, Syktyvkar 167001, Russia
[2] RAS, Komi Sci Ctr UB, Inst Geol, Pervomaiskaya St 48, Syktyvkar 167982, Russia
[3] St Petersburg State Univ, Univ Emb 7-9, St Petersburg 199034, Russia
来源：
CERAMICS INTERNATIONAL | 2023年 / 49卷 / 03期
关键词：
Ceramics; Bismuth tantalate pyrochlore; Magnesium and zinc doping; Phase formation; DIELECTRIC-PROPERTIES; ELECTRICAL-PROPERTIES; THERMAL-EXPANSION; CONDUCTIVITY; EQUILIBRIA; TANTALATE; SYSTEM;
D O I：
10.1016/j.ceramint.2022.10.073
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
New pyrochlores (sp. gr. Fd-3m) of Bi2Mg(Zn)1-XMXTa2O9.5-Delta (M -Cr, Fe) composition were obtained for the first time by the method of solid-phase synthesis. The process of phase formation of pyrochlores in the temperature range 650-1050 degrees C was studied. It has been established that the precursor of the pyrochlore phase in all cases is orthorhombic bismuth orthotantalate BiTaO4. The pyrochlore phase synthesis reaction proceeds predominantly at temperatures above 850-900 degrees C. The influence of magnesium and zinc on the course of pyrochlore synthesis was revealed. For chromium pyrochlores, the formation of intermediate phases such as Bi6Cr2O15, Bi16CrO27 was established; for iron-containing pyrochlores, Bi25FeO40 was identified as an intermediate phase. For all systems, the change in the parameter of the pyrochlore cell constant depending on the synthesis temperature was analyzed. The samples are characterized by a porous dendritic microstructure. The calcination temperature did not significantly affect the microstructure of the samples. The porosity of the samples was estimated. The optimal calcination temperature for obtaining phase-clean pyrochlores can be considered 1050 degrees C.
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页码：5496 / 5509
页数：14
相关论文
共 28 条
  • [1] Akselrud L. G., 1989, THES REP 12 EUR CRYS, P155
  • [2] Subsolidus phase equilibria and electrical properties of pyrochlores in the Bi2O3-CuO-Ta2O5 ternary system
    Chon, M. P.
    Tan, K. B.
    Khaw, C. C.
    Zainal, Z.
    Taufiq-Yap, Y. H.
    Chen, S. K.
    Tan, P. Y.
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2016, 675 : 116 - 127
  • [3] STRUCTURAL STUDIES OF SOME BODY-CENTERED CUBIC PHASES OF MIXED OXIDES INVOLVING BI2O3 - STRUCTURES OF BI25FEO40 AND BI38ZNO60
    CRAIG, DC
    STEPHENSON, NC
    [J]. JOURNAL OF SOLID STATE CHEMISTRY, 1975, 15 (01) : 1 - 8
  • [4] Observations on structural evolution and dielectric properties of oxygen-deficient pyrochlores
    Du, HL
    Wang, H
    Yao, X
    [J]. CERAMICS INTERNATIONAL, 2004, 30 (07) : 1383 - 1387
  • [5] Gattow G., 1964, Z. Anorg. Allg. Chem, V328, P44
  • [6] Temperature independent low loss dielectrics based on quaternary pyrochlore oxides
    Giampaoli, Gabriella
    Siritanon, Theeranun
    Day, Blake
    Li, Jun
    Subramanian, M. A.
    [J]. PROGRESS IN SOLID STATE CHEMISTRY, 2018, 50 : 16 - 23
  • [7] Structure and ionic conductivity of Bi6Cr2O15, a new structure type containing (Bi12O14)n8n+ columns and CrO42- tetrahedra
    Grins, J
    Esmaeilzadeh, S
    Hull, S
    [J]. JOURNAL OF SOLID STATE CHEMISTRY, 2002, 163 (01) : 144 - 150
  • [8] High temperature dielectric properties of cubic bismuth zinc tantalate
    Khaw, C. C.
    Tan, K. B.
    Lee, C. K.
    [J]. CERAMICS INTERNATIONAL, 2009, 35 (04) : 1473 - 1480
  • [9] Phase diagram of the Bi2O3-Cr2O3 system
    Liu, Y. H.
    Li, J. B.
    Liang, J. K.
    Luo, J.
    Ji, L. N.
    Zhang, J. Y.
    Rao, G. H.
    [J]. MATERIALS CHEMISTRY AND PHYSICS, 2008, 112 (01) : 239 - 243
  • [10] Experimental study of the Bi2O3-Fe2O3 pseudo-binary system
    Maître, A
    François, M
    Gachon, JC
    [J]. JOURNAL OF PHASE EQUILIBRIA AND DIFFUSION, 2004, 25 (01) : 59 - 67
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