scholarly journals Dielectric constant, power factor, and conductivity of the system rubber-calcium carbonate

1942 ◽  
Vol 28 (3) ◽  
pp. 279 ◽  
Author(s):  
A.H. Scott ◽  
A. McPherson
Keyword(s):  
Dielectric Constant ◽  
Calcium Carbonate ◽  
Power Factor ◽  
Constant Power

Dielectric Constant, Power Factor, and Conductivity of the System Rubber-Calcium Carbonate

1942 ◽  
Vol 15 (4) ◽  
pp. 879-894
Author(s):  
Arnold H. Scott ◽  
Archibald T. McPherson
Keyword(s):  
Dielectric Constant ◽  
Calcium Carbonate ◽  
Natural Rubber ◽  
Power Factor ◽  
Loss Tangent ◽  
Direct Relationship ◽  
Dielectric Constants ◽  
Constant Power ◽  
Dielectric Constant And Loss

Abstract The results obtained in this investigation indicate that either the formula developed by Wiener (Formula 7) or the exponent formula (Formula 9) may be used for the computation of the dielectric constants of mixtures of calcium carbonate and rubber. Formula 7 may be preferred, since it gives some indication of the shape of the particles and state of dispersion of the powder. There was little difference between values of the dielectric constant and loss tangent at 1 kilocycle per second and at 100 kilocycles per second. The change of the loss tangent with the content of calcium carbonate was not large, but a direct relationship between loss tangent and percentage of calcium carbonate was indicated. The 1-minute-conductivity values increased continuously with increasing content of calcium carbonate when Vistanex was used as the base, but passed through a minimum when natural rubber was used.

Effect of Pressure on the Dielectric Constant, Power Factor, and Conductivity of Rubber-Sulfur Compounds

1936 ◽  
Vol 9 (3) ◽  
pp. 449-467
Author(s):  
Arnold H. Scott
Keyword(s):  
Dielectric Constant ◽  
Electrical Properties ◽  
Sulfur Content ◽  
Power Factor ◽  
Sulfur Compounds ◽  
Constant Power ◽  
Current Frequency ◽  
Effect Of Pressure ◽  
The Third

Abstract This paper reports the results of a study on the effect of pressure on the dielectric constant, power factor, and conductivity of rubber-sulfur compounds, and is the third paper of a series dealing with the electrical properties of rubber-sulfur compounds. The previous papers dealt with the effect of sulfur content, temperature, and current frequency on these electrical properties. The results reported in the present paper have been corrected for changes in the dimensions of specimens caused by changes in pressure. The required data for making these corrections were obtained from a detailed study of the compressibility of rubber-sulfur compounds which has recently been completed.

One-Cycle-Controlled Bidirectional AC-to-DC Converter With Constant Power Factor

2009 ◽  
Vol 56 (5) ◽  
pp. 1499-1510 ◽  
Author(s):  
Dharmraj V. Ghodke ◽  
E.S. Sreeraj ◽  
Kishore Chatterjee ◽  
B. G. Fernandes
Keyword(s):  
Power Factor ◽  
Constant Power

Precursors Influence on CaCu3Ti4O12 Synthesis

2012 ◽  
Vol 727-728 ◽  
pp. 1313-1316 ◽  
Author(s):  
Maria Virginia Gelfuso ◽  
Gabriel Moreira Lima ◽  
Daniel Thomazini
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Dielectric Constant ◽  
Calcium Carbonate ◽  
Calcium Hydroxide ◽  
Room Temperature ◽  
Microstructural Analysis ◽  
Copper Nitrate ◽  
N Powder ◽  
Scanning Electron

In this work CCTO have been synthesized in two different chemical precursors: calcium hydroxide and copper sulfate were used to compose CCTO-S powder while calcium carbonate and copper nitrate were used to form CCTO-N powder. Calcinations conditions were dramatically different in terms of shelf time and temperature. The CCTO phase was fully obtained for 3 hours of calcination in CCTO-N against the 24 hours to form the same phase in CCTO-S powder. Ceramic bodies densities values for CCTO-S samples were 95% of theoretical density (5.05 g/cm3) and 98% for CCTO-N. The dielectric constant, at room temperature, was obtained for ceramics processed by two routes. Microstructural analysis was conducted by Scanning Electron Microscopy (SEM) and it was performed to explain the dielectric constant differences between CCTO-S and CCTO-N ceramics.

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