scholarly journals The theoretical calibration coefficient in the measurement of nonlinear dielectric constant with a scanning tip microwave near-field microscopy

2003 ◽  
Vol 52 (1) ◽  
pp. 34
Author(s):  
Liu Xue-Rong ◽  
Hu Bo ◽  
Liu Wen-Han ◽  
Gao Chen
Keyword(s):  
Dielectric Constant ◽  
Near Field ◽  
Calibration Coefficient ◽  
Nonlinear Dielectric

Normal modes of a cylindrical waveguide in a medium with a nonlinear dielectric constant

1984 ◽  
Vol 27 (12) ◽  
pp. 1061-1065
Author(s):  
V. I. Korneev ◽  
N. N. Akhmediev ◽  
T. D. Shermergor
Keyword(s):  
Dielectric Constant ◽  
Normal Modes ◽  
Cylindrical Waveguide ◽  
Nonlinear Dielectric

Non-Destructive Detection of GIS Aluminum Alloy Shell Weld Based on Oblique Incidence Full Focus Method

2020 ◽  
Vol 1007 ◽  
pp. 105-110
Author(s):  
Xin Xin Wang ◽  
Cheng He ◽  
Pu Zhi Zhao ◽  
Yi Zheng ◽  
Shi Hao Jiang ◽  
...  
Keyword(s):  
Oblique Incidence ◽  
Near Field ◽  
Calibration Coefficient ◽  
Quantitative Detection ◽  
Imaging Method ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Field Range ◽  
Weld Defects ◽  
Non Destructive

In this paper, a new ultrasonic phased array full focus imaging method based on oblique incidence is proposed to solve the problem of the non-destructive testing of the internal defects in the GIS (gas insulated switchgear) shell welds. By using wedge coupling, the measured weld is far away from the near-field range of the transducer, and the detection angle range can be increased by changing the propagation direction of the acoustic beam. Based on Snell's law, the propagation characteristics of the ultrasonic wave in the interface are studied. On the basis of the conventional ultrasonic array matrix and the full focus imaging algorithm, by introducing the energy attenuation calibration coefficient of the acoustic wave propagation through the wedge, the correction amplitude of the specific focus point p(x, z) is obtained, The non-destructive testing of weld defects of GIS shell in the spot is carried out, and the test results show that the qualitative and quantitative detection of the weld defects can be well realized by using this method.

Randomly-grown high-dielectric-constant ZnO nanorods for near-field enhanced Raman scattering

2010 ◽  
Vol 102 (3) ◽  
pp. 661-665 ◽  
Author(s):  
Mitsuhiro Terakawa ◽  
Yuto Tanaka ◽  
Go Obara ◽  
Tatsunori Sakano ◽  
Minoru Obara
Keyword(s):  
Dielectric Constant ◽  
Raman Scattering ◽  
High Dielectric Constant ◽  
Near Field ◽  
Zno Nanorods ◽  
Enhanced Raman Scattering ◽  
High Dielectric

Nonlinear dielectric constant in relaxor ferroelectrics

1998 ◽  
Vol 217 (1) ◽  
pp. 297-306 ◽  
Author(s):  
Hiroshi Orihara ◽  
Ryuichi Kamei ◽  
Makoto Iwata ◽  
Yoshihiro Ishibashi ◽  
Hidehiro Ohwa ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Relaxor Ferroelectrics ◽  
Nonlinear Dielectric

Measurement of Three Dimensional Polarization Direction in Ferroelectric Thin Films Using Scanning Nonlinear Dielectric Microscopy with Rotating Electric Field

2002 ◽  
Vol 748 ◽  
Author(s):  
Hiroyuki Odagawa ◽  
Yasuo Cho
Keyword(s):  
Thin Films ◽  
Dielectric Constant ◽  
Electric Field ◽  
Three Dimensional ◽  
Ferroelectric Thin Films ◽  
Experimental Result ◽  
Polarization Direction ◽  
Polarization Component ◽  
Nonlinear Dielectric ◽  
Component Parallel

ABSTRACTA scanning nonlinear dielectric microscope (SNDM) probe, called theε311 -type probe, and a system to measure the ferroelectric polarization component parallel to the surface using rotating electric field have been developed. This is achieved by measuring the ferroelectric material's nonlinear dielectric constant ε311 instead of ε333, which is measured in conventional SNDM. Experimental result shows that we can successfully determine polarization component parallel to the surface. The SNDM system can measure polarization at any angle from the surface normal which is often of interest.

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