Realizing isotropic negative thermal expansion covering room temperature by breaking the superstructure of ZrV2O7

2020 ◽  
Vol 116 (18) ◽  
pp. 181902 ◽  
Author(s):  
Wei Wei ◽  
Qilong Gao ◽  
Juan Guo ◽  
Mingju Chao ◽  
Lunhua He ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Room Temperature ◽  
Negative Thermal Expansion

Polymorphism in Ho2(MoO4)3

2013 ◽  
Vol 28 (S2) ◽  
pp. S33-S40 ◽  
Author(s):  
C. González-Silgo ◽  
C. Guzmán-Afonso ◽  
V. M. Sánchez-Fajardo ◽  
S. Acosta-Gutiérrez ◽  
A. Sánchez-Soares ◽  
...  
Keyword(s):  
Phase Transition ◽  
Thermal Expansion ◽  
Room Temperature ◽  
Linear Expansion ◽  
Negative Thermal Expansion ◽  
Thermal Treatments ◽  
Positive Coefficient ◽  
X Ray ◽  
Expansion Coefficients ◽  
First Time

Two polymorphs of Holmium molybdate, known as β'-phase and γ-phase, were prepared by solid state reaction with different thermal treatments. These polycrystalline samples have been studied for the first time by X-ray thermodiffractometry from room temperature up to 1300 K. We found that the initial β'-phase undergoes a transition to a β-phase and then to a γ-phase. The γ (hydrated)-phase, turns to the γ (dehydrated)-phase and then to the β-phase. Each sequence involves a reversible and an irreversible phase transition for Ho2(MoO4)3. Both polymorphs have remarkable physical properties like nonlinear optics, ferroelectricity and negative thermal expansion. We have calculated the linear expansion coefficients of both phases. We have obtained a positive coefficient for the β'-phase and a negative one for the γ-phase. Moreover, we have made a comparison of the obtained coefficients with previous results for other rare earth molybdates.

Negative Thermal Expansion of Ni-Doped MnCoGe at Room-Temperature Magnetic Tuning

2019 ◽  
Vol 11 (19) ◽  
pp. 17531-17538 ◽  
Author(s):  
Qingyong Ren ◽  
Wayne Hutchison ◽  
Jianli Wang ◽  
Andrew Studer ◽  
Guohua Wang ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Room Temperature ◽  
Negative Thermal Expansion ◽  
Magnetic Tuning

The tunable negative thermal expansion covering a wide temperature range around room temperature in Sn, Mn co-substituted Mn3ZnN

2020 ◽  
Vol 49 (30) ◽  
pp. 10407-10412
Author(s):  
Shugang Tan ◽  
Chenhao Gao ◽  
Cao Wang ◽  
Tong Zhou ◽  
Guangchao Yin ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Wide Temperature Range ◽  
Room Temperature ◽  
Negative Thermal Expansion ◽  
Temperature Range

Based on anti-perovskite Mn3ZnN, the negative thermal expansion (NTE) temperature can be effectively broadened via co-substituting Sn, Mn.

scholarly journals Giant negative thermal expansion covering room temperature in nanocrystalline GaNxMn3

2015 ◽  
Vol 107 (13) ◽  
pp. 131902 ◽  
Author(s):  
J. C. Lin ◽  
P. Tong ◽  
X. J. Zhou ◽  
H. Lin ◽  
Y. W. Ding ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Room Temperature ◽  
Negative Thermal Expansion

Bulk thermal expansion for tungstate and molybdates of the type A2M3O12

1999 ◽  
Vol 14 (3) ◽  
pp. 912-915 ◽  
Author(s):  
T. A. Mary ◽  
A. W. Sleight
Keyword(s):  
Thermal Expansion ◽  
Room Temperature ◽  
Negative Thermal Expansion ◽  
Observed Behavior

Bulk thermal expansion properties of 19 members of the A2M3O12 family of tungstates and molybdates were determined from room temperature to 800 °C. The observed behavior ranges from strong negative thermal expansion (α = −11 × 10−6 K−1) in Sc2W3O12 to near zero thermal expansion in Al1.68Sc0.02In0.30W3O12.

Colossal negative thermal expansion with an extended temperature interval covering room temperature in fine-powdered Mn0.98CoGe

2016 ◽  
Vol 109 (24) ◽  
pp. 241903 ◽  
Author(s):  
Jianchao Lin ◽  
Peng Tong ◽  
Kui Zhang ◽  
Haiyun Tong ◽  
Xinge Guo ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Temperature Interval ◽  
Room Temperature ◽  
Negative Thermal Expansion

Order–disorder transformation of intercalated cations triggering huge negative thermal expansion, switchable dielectrics and ion conduction near room temperature in a 2D vanadium oxide hybrid

2019 ◽  
Vol 7 (42) ◽  
pp. 13243-13252 ◽  
Author(s):  
Zhi-Yuan Yao ◽  
Yin Qian ◽  
Qiu Ren ◽  
Guo-Qin Zhang ◽  
Jin Zhang ◽  
...  
Keyword(s):  
Phase Transition ◽  
Thermal Expansion ◽  
Vanadium Oxide ◽  
Room Temperature ◽  
Negative Thermal Expansion ◽  
Ion Conduction ◽  
Disorder Phase Transition

A 2D vanadium oxide hybrid crystal shows an order–disorder phase transition at ∼328 K/316 K upon heating/cooling, which triggers huge negative thermal expansion, switchable dielectrics and ion conduction near room temperature.

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