scholarly journals Transition Temperature of Lead-Free Piezoelectric Ceramics by Electrochemical Impedance Spectroscopy

2009 ◽  
Vol 27 (3) ◽  
pp. 363-369 ◽  
Author(s):  
A M Torres-Huerta ◽  
J G González-Reyes ◽  
M E Villafuerte-Castrejón ◽  
F González ◽  
E Ramírez-Meneses ◽  
...  
Keyword(s):  
Transition Temperature ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Electrochemical Impedance ◽  
Piezoelectric Ceramics ◽  
Lead Free

Identifying thermal phase transitions of lignin–solvent mixtures using electrochemical impedance spectroscopy

2016 ◽  
Vol 18 (7) ◽  
pp. 1892-1897 ◽  
Author(s):  
Adam S. Klett ◽  
Jordan A. Gamble ◽  
Mark C. Thies ◽  
Mark E. Roberts
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Electrochemical Impedance ◽  
Solvent Mixtures ◽  
New Approach ◽  
Thermal Phase ◽  
Solvent Systems ◽  
Thermal Phase Transitions

A new approach to measuring the phase-transition temperature of lignin–solvent systems using electrochemical impedance spectroscopy is reported.

Electrochemical Impedance Spectroscopy as a Prospective Tool for the Characterization of the Intermetallic Microstructure of Lead Free Solder

2015 ◽  
Vol 812 ◽  
pp. 333-338 ◽  
Author(s):  
Tamás Hurtony ◽  
Attila Bonyár ◽  
Péter Gordon
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Electrochemical Impedance ◽  
Electrochemical Etching ◽  
Complex Impedance ◽  
Lead Free ◽  
Electrochemical Impedance Spectrum ◽  
Lead Free Solder ◽  
Impedance Spectra ◽  
Free Solder

In this study the possibility to apply electrochemical impedance spectroscopy as an alternative method for the characterisation of the intermetallic microstructures of Sn-3.5Ag lead free solder samples was investigated. The aim of the study is to compare the electrochemical impedance spectra of solder samples, reflowed with different heat profiles. A quenching technique was applied in order to solidify the solder samples in cylindrical crucibles. Differences in the microstructures of the solidified alloys were achieved by changing the temperature of the quenching media. The molded and cross sectioned specimens were observed using both optical microscopy and scanning electron microscopy (SEM) combined with energy dispersive spectroscopy (EDS). The microstructure of the ingots was revealed by selective electrochemical etching. The electrochemical impedance spectrum (EIS) was measured before and also after the selective etching process. The complex impedance spectra contain information regarding the characterized microstructure. Our aim is to determine quantitative parameters which are identical to the characteristics of the microstructure.

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