scholarly journals Effect of Tunnel Pit Radius Variation on the Electric Characteristics of Aluminum Electrolytic Capacitor

2019 ◽  
Author(s):  
Daisaku Mukaiyama
Keyword(s):  
Transmission Line ◽  
Normal Distribution ◽  
Electrolytic Capacitor ◽  
Aluminum Electrolytic Capacitor ◽  
Electrolytic Capacitors ◽  
Cylindrical Holes ◽  
Log Normal ◽  
Log Normal Distribution ◽  
Aluminum Electrolytic Capacitors

The electric characteristics of aluminum electrolytic capacitors had been analyzed by the transmission line model. The anode foil pits are considered as cylindrical holes and the pit impedance is estimated by the transmission line mode, too. The pit impedance depends on the pit geometry, in particular, radius. The distribution of the pit radius of etched foils is not in accordance with a normal distribution, but a log normal distribution. In this paper, the effect of the pit radius distribution on the impedance of aluminum electrolytic capacitors is calculated by Monte Carlo method. #ECS235, Presentation Type: Oral,Date/Time/Location: May 28, 2019 (11:00h-11:20h, Pearl 5) Symposium: F03: Characterization of Porous Materials 8,Presentation Type: Oral, Abstract Number: #F03-1107

scholarly journals A Universal Model for the Log-Normal Distribution of Elasticity in Polymeric Gels and Its Relevance to Mechanical Signature of Biological Tissues

Biology ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 64
Author(s):  
Arnaud Millet
Keyword(s):  
Elastic Modulus ◽  
Normal Distribution ◽  
Biological Tissues ◽  
Force Microscopy ◽  
Polymeric Gels ◽  
Atomic Force ◽  
Clear Explanation ◽  
Log Normal ◽  
Log Normal Distribution

The mechanosensitivity of cells has recently been identified as a process that could greatly influence a cell’s fate. To understand the interaction between cells and their surrounding extracellular matrix, the characterization of the mechanical properties of natural polymeric gels is needed. Atomic force microscopy (AFM) is one of the leading tools used to characterize mechanically biological tissues. It appears that the elasticity (elastic modulus) values obtained by AFM presents a log-normal distribution. Despite its ubiquity, the log-normal distribution concerning the elastic modulus of biological tissues does not have a clear explanation. In this paper, we propose a physical mechanism based on the weak universality of critical exponents in the percolation process leading to gelation. Following this, we discuss the relevance of this model for mechanical signatures of biological tissues.

scholarly journals Dielectric Characteristics Analysis of Aluminum Electrolytic Capacitor Based on Linear Response Funcation_Slide_235th ECS

2019 ◽  
Author(s):  
Daisaku Mukaiyama
Keyword(s):  
Linear Response ◽  
Linear Response Theory ◽  
Electrolytic Capacitor ◽  
Aluminum Electrolytic Capacitor ◽  
Dielectric Characteristics ◽  
Electrolytic Capacitors ◽  
Sheraton Hotel ◽  
Characteristics Analysis ◽  
Aluminum Oxide Layer ◽  
Aluminum Electrolytic Capacitors

We discuss the dielectric characteristics of Aluminum Electrolytic Capacitors based on linear response theory. Furthermore, a useful formula had been derived to analyze the dielectric properties of Aluminum oxide layer in Aluminum Electrolytic Capacitors. #ECS 235,Tuesday, 28 May 2019, 10:00 - 12:00,Dallas Sheraton Hotel - Pearl , Abstract Number : #F03-1106.

scholarly journals Pd-complex driven formation of single-chain nanoparticles

2015 ◽  
Vol 6 (24) ◽  
pp. 4358-4365 ◽  
Author(s):  
Johannes Willenbacher ◽  
Ozcan Altintas ◽  
Vanessa Trouillet ◽  
Nicolai Knöfel ◽  
Michael J. Monteiro ◽  
...  
Keyword(s):  
Normal Distribution ◽  
Single Chain ◽  
Log Normal ◽  
Log Normal Distribution

The preparation and in-depth characterization of well-defined, palladium(ii) crosslinked single-chain nanoparticles (Pd-SCNPs) is reported. In addition, a novel procedure for interpreting the SEC chromatograms of SCNPs by log-normal distribution (LND) simulations is introduced.

Etching Anode Foil with Branch Tunnels for Aluminum Electrolytic Capacitors

2019 ◽  
Vol 19 (11) ◽  
pp. 7471-7475 ◽  
Author(s):  
Chao-Lei Ban ◽  
Jian-Hai Chen ◽  
Fang-Ren Wang ◽  
Shu-Qin Zhu ◽  
Zhen-Qi Liu
Keyword(s):  
Cross Section ◽  
Acidic Solution ◽  
Electrochemical Impedance ◽  
Electrolytic Capacitor ◽  
Nacl Solution ◽  
Aluminum Electrolytic Capacitor ◽  
Electrolytic Capacitors ◽  
Corrosion Cell ◽  
Anode Foil ◽  
Aluminum Electrolytic Capacitors

Al foil for high-voltage aluminum electrolytic capacitor was first D.C. etched in HCl–H2SO4 mixed acidic solution to form main tunnels and then D.C. etched in natural NaCl solution containing 0.1% H2C2O4 and different trace amounts of Zn(NO3)2. Between the two etching processes, Zn nuclei were deposited on the interior surface of the main tunnels by the natural occluded corrosion cell effect to form micro Zn–Al galvanic local cells. The effects of Zn nuclei on the cross-section etching and electrochemical behavior of Al foil were investigated using scanning electron microscopy, polarization curve measurement, and electrochemical impedance spectroscopy. The sub-branch tunnels can form along the main tunnels owing to the formation of Zn–Al micro-batteries, in which Zn is the cathode and Al is the anode. Increasing Zn(NO3)2 concentration increases the number of Zn nuclei that can serve as sites for branch tunnel initiation along the main tunnels, thereby enhancing the specific capacitance of etched Al foil.

Characterization of hetero-block copolymers by the log-normal distribution model

2016 ◽  
Vol 7 (17) ◽  
pp. 2992-3002 ◽  
Author(s):  
Michael J. Monteiro ◽  
Mikhail Gavrilov
Keyword(s):  
Molecular Weight ◽  
Chemical Composition ◽  
Block Copolymers ◽  
Normal Distribution ◽  
Distribution Model ◽  
Molecular Weight Distributions ◽  
Weight Distributions ◽  
Log Normal ◽  
Log Normal Distribution

Fitting multiple and of different chemical composition molecular weight distributions using the log-normal distribution (LND) model.

scholarly journals Dielectric Characteristics Analysis of Aluminum Electrolytic Capacitors Based on Linear Response Function

2019 ◽  
Vol 166 (16) ◽  
pp. E554-E563
Author(s):  
Daisaku Mukaiyama ◽  
Masayoshi Yamamoto
Keyword(s):  
Frequency Domain ◽  
Response Function ◽  
Linear Response ◽  
Dissipation Factor ◽  
Electrolytic Capacitor ◽  
Aluminum Electrolytic Capacitor ◽  
Dielectric Characteristics ◽  
Electrolytic Capacitors ◽  
Linear Response Function ◽  
Aluminum Electrolytic Capacitors

The electrical characteristics of Aluminum Electrolytic Capacitors are usually measured in frequency domain. The measured data of capacitance and dissipation or equivalent series resistance (ESR) has been treated individually for each frequency, and the “LCR” model has been developed by utilizing the measurement data in frequency domain. Therefore, these models don't show any relation between capacitance and dissipation which should follow the Kramers-Kronig relations. In this paper, we discuss the dielectric characteristics of Aluminum Electrolytic Capacitors based on the linear response theory. The complex dielectric formula based on this study can explain both the frequency and the temperature characteristic of capacitance of Aluminum Electrolytic Capacitor, and the relation between the frequency dependency of capacitance and the dissipation factor. This study is based on the hypothesis that the linear response function of the dielectric of Aluminum Electrolytic Capacitor should be expressed as the -nth powers of the ratio of time to the relaxation saturation time τdi. Only the two parameters: 1- n and τdi can give the exact calculation formula to both the capacitance and the dissipation factor of the dielectric behavior of Aluminum Electrolytic Capacitors.

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