A comparative study of low-field magnetoresistance for La2/3Ca1/3Mn1 xCuxO3(x 0  and 4 ) synthesized at different temperatures

2003 ◽  
Vol 36 (13) ◽  
pp. 1446-1450 ◽  
Author(s):  
S L Yuan ◽  
J Tang ◽  
Z C Xia ◽  
L F Zhao ◽  
L Liu ◽  
...  
Keyword(s):  
Comparative Study ◽  
Low Field ◽  
Different Temperatures

Impedance Analysis of Layer Structured NBT–CBT Mixed Ceramics

1998 ◽  
Vol 12 (11) ◽  
pp. 433-441 ◽  
Author(s):  
P. S. Rama Sastry ◽  
T. Bhimasankaram ◽  
G. S. Kumar ◽  
G. Prasad
Keyword(s):  
Comparative Study ◽  
Complex Impedance ◽  
Impedance Analysis ◽  
Equivalent Circuits ◽  
Impedance Spectra ◽  
Ceramic System ◽  
Different Temperatures ◽  
Mixed Ceramics ◽  
Mixed Ceramic ◽  
Complex Impedance Spectra

Complex impedance spectra of ferroelectric mixed ceramic system ( Na 0.5 Bi 0.5)1-x Ca x Bi 4 Ti 4 O 15 with x=0, 0.1, 0.3, 0.5, 0.7 and 1 was studied as a function of frequency and temperature in the range 1 KHz to 10 MHz and 30°C to 620°C respectively. Equivalent circuits involving resistive and capacitive elements at different temperatures, activation energies of relaxations and conduction were evaluated using impedance plots. A comparative study of impedance and conductivity facilities an insight in understanding the electrical nature of these electroceramics.

A Comparative Study of Soldering Temperatures and Materials on the Reliability of Photovoltaic Modules

2012 ◽  
Vol 562-564 ◽  
pp. 188-191
Author(s):  
Keh Moh Lin ◽  
Yang Hsien Lee ◽  
Wen Yeong Huang ◽  
Po Chun Hsu ◽  
Chin Yang Huang ◽  
...  
Keyword(s):  
Comparative Study ◽  
Lead Free ◽  
Automatic Process ◽  
Lead Free Solder ◽  
Snagcu Solder ◽  
Photovoltaic Modules ◽  
Soldering Process ◽  
Different Temperatures ◽  
Free Solder

To find out the important factors which decisively affect the soldering quality of photovoltaic modules, solar cells were soldered under different conditions (different temperatures, PbSn vs. SnAgCu solder, manual vs. semi-automatic). Experimental results show that the soldering quality of PbSn under 350°C in the semi-automatic soldering process was quite stable while the soldering quality of lead-free solder was generally unacceptable in the manual or semi-automatic process under different temperatures. This result indicates that the soldering process with lead-free solder still needs to be further improved. It was also found that most cracks were formed on the interface between the solder and the silver paste and then expanded outwards.

Intraracial variation in Phytophthora infestans, and its relationship to different host varieties

1969 ◽  
Vol 47 (6) ◽  
pp. 863-867 ◽  
Author(s):  
Alan Upshall
Keyword(s):  
Growth Rate ◽  
Comparative Study ◽  
Phytophthora Infestans ◽  
Resistant Variety ◽  
Rate Variation ◽  
Low Field

A comparative study of the magnitude of growth rate variation among isolates of Phytophthora infestans (Mont.) de Bary taken from a high and a low field resistant variety of potato has shown it to be greater in the former than in the latter, even though both crops were infected by the same population of the pathogen. Competition between spores, and adaptation to the varieties, are put forward as possible alternative explanations.

A Comparative Study of the Natural and Experimental Corrosion of Poorly Durable Potash-Lime-Silica Glasses

1993 ◽  
Vol 333 ◽  
Author(s):  
G.I. Cooper ◽  
G.A. Cox
Keyword(s):  
Comparative Study ◽  
Corrosion Products ◽  
Solution Composition ◽  
Silica Glasses ◽  
Corrosion Rates ◽  
Different Temperatures

ABSTRACTNaturally corroded, poorly durable glasses are compared with results from MCC-4 leach tests on similar glasses. It is suggested that different corrosion products are formed at different temperatures; therefore, care should be taken when interpreting experimental leach rates. Solution composition, pH and flow around the sample can also have a profound effect on corrosion rates.

scholarly journals Comparative Study on the Performance of Microbial Fuel Cells and Bacterial Community at Different Temperatures

2013 ◽  
Vol 11 (2) ◽  
pp. 71-79 ◽  
Author(s):  
Guangyu ZHOU ◽  
Naoki YOKOYAMA ◽  
Yuichiro YOSHINO ◽  
Takahiro YAMASHITA ◽  
Yasunori KAWAGOSHI
Keyword(s):  
Fuel Cells ◽  
Bacterial Community ◽  
Comparative Study ◽  
Microbial Fuel Cells ◽  
Different Temperatures
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