scholarly journals Nonlinear behavior of ferroelectric ceramics during mechanical depolarization at room and high temperatures: experiment and prediction by an experimental formula

2018 ◽  
Vol 126 (1) ◽  
pp. 39-49 ◽  
Author(s):  
Dae Won JI ◽  
Sang-Joo KIM
Keyword(s):  
High Temperatures ◽  
Nonlinear Behavior ◽  
Ferroelectric Ceramics

Ionic conductivity of monohydroxy alcohol liquids doped with known probe ions and analysis of the liquid structure

2020 ◽  
pp. 2150014
Author(s):  
Gui-Hua Lu ◽  
Li-Na Wang ◽  
Xing-Yu Zhao ◽  
Yu-Fen He ◽  
Yi-Neng Huang
Keyword(s):  
Ionic Conductivity ◽  
Small Molecules ◽  
High Temperatures ◽  
Low Temperatures ◽  
Nonlinear Behavior ◽  
Liquid Structure ◽  
Addition Formula ◽  
Commercial Equipment

The specific values of the conductivity [Formula: see text] and its variation with temperature [Formula: see text] of 2-pentanol and 2-methyl-1-pentanol liquids doped with different concentrations of NaI (abbreviated as 2PEN-[Formula: see text]NaI and 2M1PEN-[Formula: see text]NaI, respectively) ([Formula: see text], 1% and 5%) are measured by the commercial equipment. The results show that whether NaI is doped or not, [Formula: see text] of 2PEN-[Formula: see text]NaI and 2M1PEN-[Formula: see text]NaI all have a conductivity peak in the range of 300–350 K different from that of typical glass-formers of small molecules. In addition, [Formula: see text] goes up with increasing [Formula: see text], and the temperature corresponding to [Formula: see text] maximum increases with rising NaI content. Moreover, there is a nonlinear behavior of [Formula: see text] with [Formula: see text], i.e., with rising [Formula: see text], [Formula: see text] decreases at low-temperatures, but increases at high-temperatures. Moreover, the liquid structure and its variation with [Formula: see text] are further analyzed based on the ionic conductivity.

On the nonlinear behavior of Young's modulus of carbon‐bonded alumina at high temperatures

2018 ◽  
Vol 101 (9) ◽  
pp. 4171-4183 ◽  
Author(s):  
Bruno Luchini ◽  
Joern Grabenhorst ◽  
Jens Fruhstorfer ◽  
Victor C. Pandolfelli ◽  
Christos G. Aneziris
Keyword(s):  
Young’S Modulus ◽  
High Temperatures ◽  
Young's Modulus ◽  
Nonlinear Behavior

Micromechanical theory of the nonlinear behavior of ferroelectric ceramics

1995 ◽  
Author(s):  
Christopher S. Lynch ◽  
Stephen C. Hwang ◽  
Robert M. McMeeking
Keyword(s):  
Nonlinear Behavior ◽  
Ferroelectric Ceramics

In situ REM imaging of surface processes on ceramic bulk crystals from 300 to 1670 K in a conventional TEM

1991 ◽  
Vol 49 ◽  
pp. 660-661
Author(s):  
Z. L. Wang ◽  
J. Bentley
Keyword(s):  
High Temperatures ◽  
Image Resolution ◽  
Atomic Processes ◽  
Crystal Surfaces ◽  
Beam Radiation ◽  
Surface Areas ◽  
Transmission Electron ◽  
Reflection Electron Microscopy ◽  
Gas Reactions

Studying the behavior of surfaces at high temperatures is of great importance for understanding the properties of ceramics and associated surface-gas reactions. Atomic processes occurring on bulk crystal surfaces at high temperatures can be recorded by reflection electron microscopy (REM) in a conventional transmission electron microscope (TEM) with relatively high resolution, because REM is especially sensitive to atomic-height steps.Improved REM image resolution with a FEG: Cleaved surfaces of a-alumina (012) exhibit atomic flatness with steps of height about 5 Å, determined by reference to a screw (or near screw) dislocation with a presumed Burgers vector of b = (1/3)<012> (see Fig. 1). Steps of heights less than about 0.8 Å can be clearly resolved only with a field emission gun (FEG) (Fig. 2). The small steps are formed by the surface oscillating between the closely packed O and Al stacking layers. The bands of dark contrast (Fig. 2b) are the result of beam radiation damage to surface areas initially terminated with O ions.

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