Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2018

Идентификатор DOI: 10.1039/c7qi00782e

Аннотация: Crystal structure evolution and temperature-dependent phase transition of solid solutions are much desired for the understanding of the optimization of functional properties. Herein, the NASICON-type NaZr2(PO4)3-SrZr4(PO4)6 solid solutions with the formula Na(2-2x)Srx[] xZr4(PO4)6 (0 ≤ x ≤ 1), where [] represents the vacancy, were prepared by the sol-gel method, and their crystal structures, phase transitions and thermal expansion properties were investigated in detail. In the range of x = 0.3-0.35, there is a reversible structural phase transition R3c ↔ R3 and the different structural models of the R3 phase and R3c phase were built to better understand the phase transition mechanism. We determined the phase transition boundary between the R3c and R3 structures and predicted the phase transition temperature of Na(2-2x)Srx[] xZr4(PO4)6 with any x for further investigation of controlled physical properties. The results indicated that Na0.5Sr0.75[] 0.75Zr4(PO4)6 showed a near zero thermal expansion in the temperature range of 450-600 K, which can find potential applications. © 2018 the Partner Organisations.

Журнал: Inorganic Chemistry Frontiers

Выпуск журнала: Vol. 5, Is. 3

Номера страниц: 619-625

ISSN журнала: 20521553

Издатель: Royal Society of Chemistry

• Liu Ying (Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing Municipal Key Lab New Energy Mat & Techno, Beijing 100083, Peoples R China)
• Molokeev Maxim S. (Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia; Far Eastern State Transport Univ, Dept Phys, Khabarovsk 680021, Russia)
• Liu Quanlin (Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing Municipal Key Lab New Energy Mat & Techno, Beijing 100083, Peoples R China)
• Xia Zhiguo (Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing Municipal Key Lab New Energy Mat & Techno, Beijing 100083, Peoples R China)

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