Crystal structures, thermal expansion and phase transitions of mixed Pr1-xLaxAlO3perovskites

2009 ◽  
Vol 6 (5) ◽  
pp. 1008-1011 ◽  
Author(s):  
Tetyana Basyuk ◽  
Leonid Vasylechko ◽  
Igor Syvorotka ◽  
Ulrike Schmidt ◽  
Dmytro Trots ◽  
...  
2018 ◽  
Vol 5 (3) ◽  
pp. 619-625 ◽  
Author(s):  
Ying Liu ◽  
Maxim S. Molokeev ◽  
Quanlin Liu ◽  
Zhiguo Xia

Structures and phase transitions depending on compositions and temperature between R3̄c and R3̄ in Na(2−2x)Srx[ ]xZr4(PO4)6 have been investigated.


1970 ◽  
Vol 25 (7) ◽  
pp. 1115-1119 ◽  
Author(s):  
Bert Jansson ◽  
Carl-Axel Sjoblom

The linear thermal expansivities of polycrystalline samples of mixtures of Li2SO4 with K2SO4 and with Na2SO4 have been measured with a “Fused-Quarz Tube” apparatus 1. Phase transitions are accompanied by changes in the expansion coefficient and also by volume changes. The observed expansion coefficient is constant over wide temperature intervals. Simple crystal structures show higher expansivities than more complex structures. The “pre-melting” phenomenon in Li2SO4 does not measurably influence the thermal expansion. A method has been devised to correct the observations for the plastic flow of the crystals close to the melting points


2015 ◽  
Vol 652 ◽  
pp. 287-291 ◽  
Author(s):  
Xiaojuan Li ◽  
Zengzhe Xi ◽  
Peng Liu ◽  
Wei Long ◽  
Pinyang Fang

2008 ◽  
Vol 34 (4) ◽  
pp. 436-442 ◽  
Author(s):  
M. I. Georgievskaya ◽  
R. S. Bubnova ◽  
S. K. Filatov ◽  
V. L. Ugolkov

1967 ◽  
Vol 70 (10) ◽  
pp. 1633-1637 ◽  
Author(s):  
Masanori NAGATANI ◽  
Makoto HAYAMA ◽  
Noboru YAMAZOE ◽  
Tetsuro SEIYAMA

2008 ◽  
Vol 20 (21) ◽  
pp. 6666-6676 ◽  
Author(s):  
Qingdi Zhou ◽  
Paul J. Saines ◽  
Neeraj Sharma ◽  
Jimmy Ting ◽  
Brendan J. Kennedy ◽  
...  

Materials ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 3945 ◽  
Author(s):  
Qiang Ma ◽  
Lulu Chen ◽  
Heng Qi ◽  
Qi Xu ◽  
Baohe Yuan ◽  
...  

In this investigation, ZrxY2−xVxMo3−xO12 (0 ≤ x ≤ 1.4) is developed and the effects of the substitutions of Zr4+/V5+ for Y3+/Mo6+ in Y2Mo3O12 on the hygroscopicity and thermal expansion property are investigated. For the smaller substitution content (x ≤ 0.5), their crystal structures remain orthorhombic, while there is crystal water still in the lattice. The linear coefficients of thermal expansions (CTEs), for x = 0.1, 0.3, 0.5, and 0.7, are about −4.30 × 10−6, −0.97 × 10−6, 0.85 × 10−6, and 0.77 × 10−6 K−1, respectively, from 476 to 773 K, which means that the linear CTE could be changed linearly with the substitution content of Zr4+/V5+ for Y3+/Mo6+ in Y2Mo3O12. As long as the substitution content reaches x = 1.3/1.4, almost no hygroscopicity and low thermal expansion from room temperature are obtained and are discussed in relation to the crystal structure and microstructure.


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