Effect of magnesium and zinc on phase formation of pyrochlore-type Bi2Mg(Zn)1-хMxTa2O9.5-Δ (M-Cr, Fe) ceramics

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Effect of magnesium and zinc on phase formation of pyrochlore-type Bi₂Mg(Zn)_1-хM_xTa₂O_9.5-Δ (M-Cr, Fe) ceramics. / Zhuk, N. A.; Makeev, B. A.; Krzhizhanovskaya, M. G.; Korolev, R. I.

In: Ceramics International, Vol. 49, No. 3, 01.02.2023, p. 5496-5509.

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

BibTeX

@article{18a30132a75a43e99789e1e426035836,

title = "Effect of magnesium and zinc on phase formation of pyrochlore-type Bi2Mg(Zn)1-хMxTa2O9.5-Δ (M-Cr, Fe) ceramics",

abstract = "New pyrochlores (sp. gr. Fd-3m) of Bi2Mg(Zn)1-хMхTa2O9.5-Δ (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°С 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°С. 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°С.",

keywords = "Bismuth tantalate pyrochlore, Ceramics, Magnesium and zinc doping, Phase formation",

author = "Zhuk, {N. A.} and Makeev, {B. A.} and Krzhizhanovskaya, {M. G.} and Korolev, {R. I.}",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier Ltd and Techna Group S.r.l.",

year = "2023",

month = feb,

day = "1",

doi = "10.1016/j.ceramint.2022.10.073",

language = "English",

volume = "49",

pages = "5496--5509",

journal = "Ceramics International",

issn = "0272-8842",

publisher = "Elsevier",

number = "3",

}

RIS

TY - JOUR

T1 - Effect of magnesium and zinc on phase formation of pyrochlore-type Bi2Mg(Zn)1-хMxTa2O9.5-Δ (M-Cr, Fe) ceramics

AU - Zhuk, N. A.

AU - Makeev, B. A.

AU - Krzhizhanovskaya, M. G.

AU - Korolev, R. I.

PY - 2023/2/1

Y1 - 2023/2/1

N2 - New pyrochlores (sp. gr. Fd-3m) of Bi2Mg(Zn)1-хMхTa2O9.5-Δ (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°С 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°С. 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°С.

AB - New pyrochlores (sp. gr. Fd-3m) of Bi2Mg(Zn)1-хMхTa2O9.5-Δ (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°С 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°С. 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°С.

KW - Bismuth tantalate pyrochlore

KW - Ceramics

KW - Magnesium and zinc doping

KW - Phase formation

UR - http://www.scopus.com/inward/record.url?scp=85139734347&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/a92d58db-13ce-3610-94bf-f532f6710fc5/

U2 - 10.1016/j.ceramint.2022.10.073

DO - 10.1016/j.ceramint.2022.10.073

M3 - Article

AN - SCOPUS:85139734347

VL - 49

SP - 5496

EP - 5509

JO - Ceramics International

JF - Ceramics International

SN - 0272-8842

IS - 3

ER -

ID: 99748687