A method of determining if unstable asphaltenes are present in a crude oil sample includes obtaining a crude oil sample and performing a fractional analysis of the crude oil sample. In one embodiment, the method further includes measuring, via a cylindrical capacitor, a dielectric constant of the...
where ε′ is a constant of proportionality defined as the relative permittivity (dielectric constant) of the material between the electrodes, ε0 is a constant known as the permittivity of free space (1/3671×10−9 Farads m−1), A is the area of the electrodes (m2), and d is the...
If after cooling, the charges are immobilised, the dielectric will behave as an electrical equivalent of a permanent magnet. This is known as an electret (thermoelectrets in this case). An electret loses its volume charge exponentially but with a very large time constant (order of 100 years...
(ii) No remarkable differences in the dielectric constant among different grades of bitumen from the same crude oil source can be seen. (iii) Regular changes of dielectric loss tangent (tan 未) among the different grades of bitumen can be observed, which can be a good indicator for the ...
The uncertainties of conductivity σ and dielectric constant є of the short-circuited tine (SCL) method due to the measured errors in the VSWR and the position of standing-wave minimum are studied. In order to cover most of the fast ion conductors, the range of σ from 10−4 to 1.0...
- 《Japanese Journal of Applied Physics》 被引量: 19发表: 2005年 DIELECTRIC TREATMENT PLATFORM FOR DIELECTRIC FILM DEPOSITION AND CURING A system for curing a low dielectric constant (low-k) dielectric film on a substrate is described, wherein the dielectric constant of the low-k dielectric ...
a4. The liquid crystal display of claim 1, wherein the first protective layer further comprises a buffer layer between the thin film transistor and the SiOC layer. [translate] a7. The liquid crystal display of claim 1, wherein the SiOC layer has a dielectric constant from about 2.8 to ...
' Cd 0 S , (7) where: C is the capacitance of the condenser with the dielectric, S stands for the area of the sample covered by the electrode, d relates to the thickness of the sample and 0 = 8.85·10-12 F/m is the dielectric constant of the vacuum. Th...
The CIP1.0 shows excellent toughness with high elongation at break of 45.0% due to the π-π stacking of numerous rigid aromatic groups and appropriate cross-linking density. The highly symmetrical structure and low polarizability of CIP1.0 result in a low dielectric constant. The CIP1.0 exhibits...
The gassing results are shown in Table 5. The starting date of the test was Jun. 2, 1998. The results show that gassing tendency of the test fluid is significantly lower than that obtained with the commercial naphthenic oil and that the gassing levels remained relatively constant over time.5...