Showing papers in "Journal of Electrostatics in 1980"

TL;DR: The main feature of electret filters is their ability to remove particulate matter from polluted air by strong electrostatic forces generated by the electret fibres from which they are made as mentioned in this paper.

TL;DR: In this paper, two methods designed to allow a characterisation of the electrostatic behavior of powders are desribed, one simulating conditions prevailing during the pneumatic transport of a powder and making it possible, within certain limits, to determine reproducibly the charge pick-up ability to powders subjected to industrial processing.

TL;DR: In this paper, it was shown that high efficiency can be obtained if the more conducting layer is highly conductive, the more resistive layer is thin, and the charge relaxation rate is slow compared with the frequency of the applied voltage.

TL;DR: In this article, the authors review electrostatic precipitator theory from the standpoint that the ideal theory should preserve the basic simplicity of the Deutsch law, yet embody all the processes taking place in a physically sensible way.

TL;DR: In this paper, an active type of discharger for fixed-wing aircraft is proposed, where discharge points trailing in the wake of the plane with a damping resistor inserted.

TL;DR: In this article, the effect of molecular motion of polymers on the frictional electrification between polycarbonate films and a metal was investigated in the temperature and friction speed ranges of 10 to 100°C and 0.001 to 40 mm s −1, respectively.

TL;DR: This article showed that contact electrification of pyroelectric insulators is strongly dependent on the direction of polarisation but probably not primarily because of the presence of compensating ions on the surface.

TL;DR: In this article, the relationship among the waveform of corona current, the dripping manner of water drops from a conductor with high d.c. voltage, the corona discharge mechanism, the specific charge (the ratio of charge to mass of the drop) and the radius of the water drops is investigated for a wide range of drop conductivity.

TL;DR: In this paper, the authors measured the space-charge depth for poly(N-vinylcarbazole) and found that the depth is between 3 and 8 μm.

TL;DR: In this article, a laser Doppler velocimeter is used to measure the velocity of charged particles under an electric field in relation to electrostatic precipitation and the true mobility of the particles is obtained, from which the effect of the corona wind is removed and the quantity of charge on the particles are estimated.

TL;DR: In this paper, electrical shearing forces acting adjacent to the boundaries of the liquid are mainly responsible for the bulk motions in the liquid, and the resulting motions were found to remain essentially two-dimensional and streakline photographs for the particle paths were obtained.

TL;DR: In this paper, the basic principles of electrostatic precipitation are given and it is shown how these apply to large installation collecting ash from pulverized fuel fired boilers in power stations.

TL;DR: In this paper, the authors make estimates of the time required for an insulator or a semiconductor to acquire a given fraction of its thermodynamic equilibrium charge when it is in contact with a metal.

TL;DR: In this article, a brief literature review puts into historical context an investigation of boiling saline-solution drops exhibiting the Leidenfrost phenomenon and the evaporation times determined for known solution volumes.

TL;DR: In this paper, the results of thermally stimulated current (TSC) measurements on polycarbonate, undoped and modified with charge-transfer complexes, are presented, showing that the polymer matrix dominates the trapping phenomena and, except for the last group, the additives modify the detrapping processes by their influence on the relaxation properties of the system.

TL;DR: In this paper, an experimental investigation on the depolarization thermocurrent, thermogravimetric and differential calorimetric measurements in La2(SO4)3·9H2O and La 2(SO 4) 3·9D2O has been carried out.

TL;DR: The d.c. electrical properties of polycarbonate (PC) in the dark and their modification by some charge transfer (CT) complexes were investigated in this paper, where the CT complexes were formed between two low-molecular-weight additives, trans-stilbene and tetracyanoethylene (TCNE), and between TCNE and the polymer.

TL;DR: In this paper, a computer program developed at Culham Laboratory for solving Poisson's equation in complex three-dimensional structures can be used for quantitative interpretation of electrostatic fieldmeter observations in practical situations.

TL;DR: In this article, a method for removing sub-micron particles from a gas by electrically charging them and then passing them through a spray of oppositely-charged liquid droplets has been investigated theoretically.

TL;DR: In this article, thermoelectrically stimulated depolarization studies of cellulose Tefas were conducted at the polarizing temperatures 50 −80°C and polarizing fields 5 −15 kV/cm.

TL;DR: In this article, the authors examined how this dust can be classified or anticipated from the type of process or feed material and after identification, how the Design Engineer can ensure that the dust or particulate matter can be precipitated effectively and economically.

TL;DR: In this paper, the electrical characteristics of Leidenfrost drops have been examined and the charge distribution on the particles determined, and speculations on possible contributory charging mechanisms have been made.

TL;DR: In this paper, a simple method of assessing the effects of poor flow distribution on particle-collection efficiency is presented and further practical implications of non-ideal flow are discussed, as well as the effect of non ideal flow on particle collection efficiency.

TL;DR: In this paper, the capacitance and conductance of a compacted layer of high resistivity fly ash particles are measured over the frequency range, 1.0 Hz to 50 kHz.