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.

Phase transition temperature and negative thermal expansion of Sc-substituted In2(MoO4)3 ceramics

2020 ◽  
Vol 55 (14) ◽  
pp. 5730-5740
Author(s):  
Zhiping Zhang ◽  
Yuenan Wang ◽  
Weikang Sun ◽  
Xiuyun Zhang ◽  
Hongfei Liu ◽  
...  
Keyword(s):  
Phase Transition ◽  
Thermal Expansion ◽  
Transition Temperature ◽  
Phase Transition Temperature ◽  
Negative Thermal Expansion

scholarly journals Study of Negative Thermal Expansion and Shift in Phase Transition Temperature in Ti4+- and Sn4+-Substituted ZrW2O8Materials

2008 ◽  
Vol 47 (2) ◽  
pp. 736-741 ◽  
Author(s):  
Klaartje De Buysser ◽  
Isabel Van Driessche ◽  
Bart Vande Putte ◽  
Paul Vanhee ◽  
Joseph Schaubroeck ◽  
...  
Keyword(s):  
Phase Transition ◽  
Thermal Expansion ◽  
Transition Temperature ◽  
Phase Transition Temperature ◽  
Negative Thermal Expansion

A Linear Scaling Law for Predicting Phase Transition Temperature via Averaged Effective Electronegativity Derived from A2M3O12-based Compounds

2021 ◽  
Author(s):  
Huanli Yuan ◽  
Chunyan Wang ◽  
QiLong Gao ◽  
Gaojie Zeng ◽  
Juan Guo ◽  
...  
Keyword(s):  
Phase Transition ◽  
Thermal Expansion ◽  
Transition Temperature ◽  
Phase Transition Temperature ◽  
Scaling Law ◽  
Negative Thermal Expansion ◽  
Linear Scaling ◽  
Ion Conduction

Chemical flexibility of A2M3O12-based compounds enables design of materials with versatile functionalities such as ferroelastic switching, ion conduction and negative thermal expansion (NTE) above ferroelastic transition temperature (Tt), promising for...

scholarly journals Phase Transition and Coefficients of Thermal Expansion in Al2−xInxW3O12 (0.2 ≤ x ≤ 1)

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4021
Author(s):  
Andrés Esteban Cerón Cerón Cortés ◽  
Anja Dosen ◽  
Victoria L. Blair ◽  
Michel B. Johnson ◽  
Mary Anne White ◽  
...  
Keyword(s):  
Phase Transition ◽  
Thermal Expansion ◽  
Thermal Shock ◽  
Monoclinic Phase ◽  
Ceramic Materials ◽  
Precipitation Method ◽  
Scanning Calorimetry ◽  
Orthorhombic Crystal ◽  
Co Precipitation

Materials from theA2M3O12 family are known for their extensive chemical versatility while preserving the polyhedral-corner-shared orthorhombic crystal system, as well as for their consequent unusual thermal expansion, varying from negative and near-zero to slightly positive. The rarest are near-zero thermal expansion materials, which are of paramount importance in thermal shock resistance applications. Ceramic materials with chemistry Al2−xInxW3O12 (x = 0.2–1.0) were synthesized using a modified reverse-strike co-precipitation method and prepared into solid specimens using traditional ceramic sintering. The resulting materials were characterized by X-ray powder diffraction (ambient and in situ high temperatures), differential scanning calorimetry and dilatometry to delineate thermal expansion, phase transitions and crystal structures. It was found that the x = 0.2 composition had the lowest thermal expansion, 1.88 × 10−6 K−1, which was still higher than the end member Al2W3O12 for the chemical series. Furthermore, the AlInW3O12 was monoclinic phase at room temperature and transformed to the orthorhombic form at ca. 200 °C, in contrast with previous reports. Interestingly, the x = 0.2, x = 0.4 and x = 0.7 materials did not exhibit the expected orthorhombic-to-monoclinic phase transition as observed for the other compositions, and hence did not follow the expected Vegard-like relationship associated with the electronegativity rule. Overall, compositions within the Al2−xInxW3O12 family should not be considered candidates for high thermal shock applications that would require near-zero thermal expansion properties.

Temperature dependence of piezoelectric properties of 0.67 Pb(Mg1/3Nb2/3)O3–0.33 PbTiO3 single crystals

2003 ◽  
Vol 18 (2) ◽  
pp. 537-541 ◽  
Author(s):  
Ping-chu Wang ◽  
Xiao-ming Pan ◽  
Dong-lin Li ◽  
Yuan-wei Song ◽  
Hao-su Luo ◽  
...  
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Temperature Dependence ◽  
Single Crystals ◽  
Phase Transition Temperature ◽  
Room Temperature ◽  
Piezoelectric Properties ◽  
Device Design ◽  
Temperature Range ◽  
Approach Zero

Piezoelectric properties k33 and d33 of 0.67 Pb(Mg1/3Nb2/3)O3–0.33 PbTiO3 single crystals grown by a modified Bridgman method were measured in the temperature range of 20–150 °C. Recoverability of the properties after the samples were heated to 110 °C, above the ferroelectric–ferroelectric (F–F) phase transition temperature of the composition, was found. From 20 to approximately 80 °C, k33 increases slightly, while d33 is almost doubled. Between approximately 90 and 100 °C, k33 decreases sharply to roughly a level of PZT-5 ceramics and d33 decreases to about 700 pC/N. They increase again with further increase of temperature; at 140 °C they attain 0.74 and approximately 1300 pC/N, respectively, and then decrease quickly and approach zero at about 150 °C. When heating to 110 °C followed by cooling to room temperature, the property decay is small. After more than one dozen heating–cooling cycles, k33 and d33 tend to be stable at 0.89 and approximately 1220 pC/N, respectively. The results might be helpful for device design and applications of PMN–PT single crystals.

Impact of thermal expansion of substrates on phase transition temperature of VO2 films

2014 ◽  
Vol 116 (12) ◽  
pp. 123510 ◽  
Author(s):  
Joe Sakai ◽  
Mustapha Zaghrioui ◽  
Masaaki Matsushima ◽  
Hiroshi Funakubo ◽  
Kunio Okimura
Keyword(s):  
Phase Transition ◽  
Thermal Expansion ◽  
Transition Temperature ◽  
Phase Transition Temperature

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.

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