A prominent dielectric material with extremely high-temperature and reversible phase transition in the high thermally stable perovskite-like architecture

2015 ◽  
Vol 3 (24) ◽  
pp. 6350-6358 ◽  
Author(s):  
Fang-Fang Wang ◽  
Cheng Chen ◽  
Yi Zhang ◽  
Heng-Yun Ye ◽  
Qiong Ye ◽  
...  
Keyword(s):  
Phase Transition ◽  
High Temperature ◽  
Transition Temperature ◽  
Phase Transition Temperature ◽  
Dielectric Material ◽  
Dielectric Materials ◽  
Dielectric Anomaly ◽  
Thermally Stable ◽  
Reversible Phase Transition ◽  
Reversible Phase

A perovskite-like dielectric material (C3N2H5)·[Mn(HCOO)3] (1), exhibiting remarkably high Tc (phase transition temperature) and pronounced dielectric anomaly, can be considered as a model of novel extremely high-temperature dielectric materials.

Direct Observation of a Surface Phase Transition by hot Tunneling Microscopy

1992 ◽  
Vol 280 ◽  
Author(s):  
Ing-Shouh Hwang ◽  
Jene A. Golovchenko
Keyword(s):  
Phase Transition ◽  
High Temperature ◽  
Transition Temperature ◽  
Direct Observation ◽  
Surface Phase ◽  
Tunneling Microscopy ◽  
Tunneling Microscope ◽  
Surface Phase Transition ◽  
Reversible Phase Transition ◽  
Reversible Phase

ABSTRACTWe study a reversible phase transition of one monolayer of Pb on a Ge(l11) surface over a range of temperature from below to above the transition temperature (∼175°C) with the tunneling microscope. The high temperature l×1 phase is a ordered monolayer l×l 2D solid. Below the transition temperature, Pb atoms are displaced from their ideal T1 positions to form trimers with periodicity.

Multisequential reversible phase transition materials with Semiconducting and fluorescence properties：(C8H18BrN)2SnBr6

2021 ◽  
Author(s):  
Yao Liu ◽  
Yu-Kong Li ◽  
Ting-Ting Ying ◽  
Yu-Hui Tan ◽  
Yun Zhi Tang ◽  
...  
Keyword(s):  
Phase Transition ◽  
Dielectric Properties ◽  
Dielectric Material ◽  
Fluorescence Properties ◽  
Metal Halides ◽  
Inorganic Hybrid ◽  
Reversible Phase Transition ◽  
Reversible Phase

Organic-inorganic hybrid metal halides with dielectric properties have attracted widespread attention due to their applications in the field of optoelectronics. Here, we successfully synthesized a novel dielectric material (C8H18BrN)2SnBr6 (1),...

Tin based organic–inorganic hybrid semiconductors with reversible phase transition and dielectric anomaly

2020 ◽  
Vol 49 (21) ◽  
pp. 7252-7257 ◽  
Author(s):  
Xiuli You ◽  
Jiaojiao Yao ◽  
Zhenhong Wei
Keyword(s):  
Phase Transition ◽  
Dielectric Anomaly ◽  
Organic Amine ◽  
Inorganic Hybrid ◽  
Hybrid Compounds ◽  
Reversible Phase Transition ◽  
Hybrid Semiconductors ◽  
Reversible Phase

Two discrete tin based organic–inorganic hybrid compounds [(FMBA)2SnX6] (X = Cl and Br) showed reversible phase transition and dielectric anomaly above 400 K which were originated from the order-disorder of a fluorine-substituted organic amine.

A Reversible Non-disruptive Phase Transition Shown by the Zinc Iodide Dimethylformamide Complex ZnI2(dmf)2

1998 ◽  
Vol 54 (5) ◽  
pp. 663-670 ◽  
Author(s):  
R. A. Edwards ◽  
A. J. Easteal ◽  
O. P. Gladkikh ◽  
W. T. Robinson ◽  
M. M. Turnbull ◽  
...  
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Intermolecular Forces ◽  
Scanning Calorimetry ◽  
Space Group ◽  
Cell Parameters ◽  
Reversible Phase Transition ◽  
Higher Temperature ◽  
High Temperature Form ◽  
Reversible Phase

At 228 K crystals of ZnI2(dmf)2 show a reversible phase transition which does not disrupt the lattice. Above the transition temperature the space group is C2/c and the cell contains eight symmetrically equivalent molecules. Cooling to below the transition temperature has little effect on the cell parameters or on the Zn- and I-atom positions, but the space group is now P21/n and the asymmetric unit comprises two conformationally different molecules. These arise from cooperative rotations of either ca +25 or −43° about the Zn—O bond of one of the dmf ligands in the high-temperature form. This displacive transition involves large movements of some atoms. The corresponding chloride and bromide are isomorphous with the higher temperature C2/c form, but it is only with the iodide that the weaker intermolecular forces permit the unusual phase change. The transition has been followed by differential scanning calorimetry, which gives an enthalpy change of 1.44 (5) kJ mol−1.

Synthesis and Phase Behavior of 4, 4’-Azobisphenol Derivatives

2011 ◽  
Vol 380 ◽  
pp. 316-319
Author(s):  
Sha Sun ◽  
Wen Cai Xu ◽  
Chun Xiu Zhang ◽  
Shi Yong Luo
Keyword(s):  
Phase Transition ◽  
High Temperature ◽  
Transition Temperature ◽  
Phase Behavior ◽  
Phase Transition Temperature ◽  
1H Nmr ◽  
Temperature Reduction ◽  
Polarizing Microscope ◽  
Phase Temperature ◽  
Phase Behaviors

In this paper, 4, 4’-Azobisphenol was synthesized with three methods which were high temperature reduction, Pb-reduction and diazotize-coupling, and diazotize-coupling was the best way. 4, 4’-Azobisphenol derivatives-1, 2- bis(4-(alloxy/hexyloxy)phenyl) diazene were synthesized through etherification. The structures of these compounds were characterized by the methods of 1H-NMR and FTIR. Phase-transition temperature was measured by DSC, and the phase behaviors were studied by the polarizing microscope. In those derivatives, only1, 2- bis(4-(hexyloxy)phenyl) diazene had mesomorphic phase and mosaic texture. Its mesomorphic phase temperature ranged from 89.3°C to101°C.

Reversible phase transition between metastable structures of Si(111)c2×8 and 1×1 studied by high-temperature STM

1998 ◽  
Vol 411 (1-2) ◽  
pp. L822-L827 ◽  
Author(s):  
Mitsuru Chida ◽  
Hiroki Minoda ◽  
Yasumasa Tanishiro ◽  
Katsumichi Yagi
Keyword(s):  
Phase Transition ◽  
High Temperature ◽  
Metastable Structures ◽  
Reversible Phase Transition ◽  
Reversible Phase
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