Phase transition and negative thermal expansion in orthorhombic Dy2W3O12

RSC Advances ◽  
2016 ◽  
Vol 6 (98) ◽  
pp. 96275-96280 ◽  
Author(s):  
Weigang Cao ◽  
Qiang Li ◽  
Kun Lin ◽  
Zhanning Liu ◽  
Jinxia Deng ◽  
...  
Keyword(s):  
Phase Transition ◽  
Thermal Expansion ◽  
Rare Earth ◽  
Rare Earth Element ◽  
Earth Element ◽  
Negative Thermal Expansion ◽  
Temperature Range

Orthorhombic Dy2W3O12 shows NTE (−2.6 × 10−5 °C−1) in the temperature range of 150–500 °C. So far, this value is the largest coefficient of negative thermal expansion in the A2W3O12 family (A = rare earth element).

Enhanced Negative Thermal Expansion in La1–xPrxFe10.7Co0.8Si1.5 Compounds by Doping the Magnetic Rare-Earth Element Praseodymium

2014 ◽  
Vol 53 (11) ◽  
pp. 5869-5873 ◽  
Author(s):  
Wen Li ◽  
Rongjin Huang ◽  
Wei Wang ◽  
Jie Tan ◽  
Yuqiang Zhao ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Rare Earth ◽  
Rare Earth Element ◽  
Earth Element ◽  
Negative Thermal Expansion ◽  
Magnetic Rare Earth

scholarly journals Negative thermal expansion in α-Zr2SP2O12 based on phase transition- and framework-type mechanisms

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Toshihiro Isobe ◽  
Yuko Hayakawa ◽  
Yuri Adachi ◽  
Ryosuke Uehara ◽  
Sachiko Matsushita ◽  
...  
Keyword(s):  
Phase Transition ◽  
Thermal Expansion ◽  
Hydrothermal Synthesis ◽  
Sulfur Content ◽  
Negative Thermal Expansion ◽  
Thermal Expansion Behavior ◽  
Temperature Range ◽  
Expansion Behavior

AbstractMaterials with negative coefficients of thermal expansion (CTEs) can be used to prepare composites with specific CTE values. Negative thermal expansion behavior can be primarily attributed to two types of mechanisms: phase transition- and framework-type mechanisms. This paper reports Zr2SP2O12, which has unique negative thermal expansion behavior involving both mechanisms. Zr2SP2O12 undergoes a framework-type mechanism at temperatures <393 K or >453 K and an isosymmetric phase transition at 393–453 K. The volumetric CTE of α-Zr2SP2O12 is ~−70 p.p.m./K during the isosymmetric phase transition, and this value can be decreased by decreasing the proportion of sulfur. The minimum volumetric CTE of α-Zr2S0.9P2O12-δ is ~−108 p.p.m./K in the temperature range of 393–453 K. Between 303 and 773 K, the volume of α-Zr2S0.9P2O12 − δ is reduced by ~1.3%. Finally, this paper presents methods for the hydrothermal synthesis of α-Zr2SP2O12 and for controlling the sulfur content.

Tailored phase transition temperature and negative thermal expansion of Sc-substituted Al2Mo3O12synthesized by a co-precipitation method

2019 ◽  
Vol 6 (7) ◽  
pp. 1842-1850 ◽  
Author(s):  
Hongfei Liu ◽  
Weikang Sun ◽  
Zhiping Zhang ◽  
Xiuyun Zhang ◽  
Yuxue Zhou ◽  
...  
Keyword(s):  
Phase Transition ◽  
Thermal Expansion ◽  
Transition Temperature ◽  
Phase Transition Temperature ◽  
Negative Thermal Expansion ◽  
Precipitation Method ◽  
Temperature Range ◽  
Co Precipitation

Sc3+substitution reduces theTcof Al2Mo3O12and makes it show stable negative thermal expansion in a wider temperature range.

RARE EARTH ELEMENT AND THORIUM ASSAYING IN PARTS OF THE EAST COAST, INDIA

2016 ◽  
Author(s):  
Shayantani Ghosal ◽  
◽  
Sudha Agrahari ◽  
Debashish Sengupta
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Earth Element ◽  
East Coast
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