부산대학교 도서관

The main purpose of the research program (September 1989 - September 1992) has been to offer chemists or engineers (interested in building a high density capacitor, capable of storing electrical energy, to be delivered continuously or by short pulses) the knowledge of the dielectric spectrum of relevant polar-apolar liquid mixtures, in a frequency range as broad as possible. This would enable the construction of capacitors using liquids of known dielectric properties at frequencies as high as feasible. To this end we have extended the microwave frequency range to 130 GHz (1 GHz = 10(exp 9)Hz). We have also explored the dielectric far-infrared to infrared range form 0.9 to 150 THz (1 THZ = 10(exp 12)Hz) or 30/cm to 5000/cm in wave numbers. This has required the procurement (through another grant of the School) of a FTIR spectrometer covering the above range, which has been adapted to our purpose. Extension of the determination of the real part of the permittivity of the solution e1 = n2 to visible frequencies, namely to the doublet emission line of Na at lambda = 589.3 nm, by conventional high precision visible refractometry, has also been accomplished with the purchase and setting up of a Bellingham and Stanley high precision refractometer capable of determining n sub D to within + or - 1 x 10(exp-5) At about the end of the grant tenure we have interpreted the imaginary part of the complex permittivity e vs frequency, in the far infrared range (for organic carbonate solutions in apolar solvents) by the Powles-Rocard resonant-relaxation function 2, which modifies the Debye relaxation function by retention of inertial effects. We have explored four systems of liquid mixtures.