摘要:

The electrical resistivities of liquid indium, tin and lead have been measured as functions of temperature up to 200–300 °C above their melting points, with an accuracy of ±0.15%. The resistivity of liquid indium was found to be a linear function of temperature but abrupt changes in the temperature coefficient of resistivity were observed for liquid tin and lead. The temperature at which the discontinuity in slope occurred and the absolute resistivity were found to be dependent on purity for liquid tin, but, within the limits of accuracy of the measurement, independent of purity for liquid lead.

ISSN:0031-9104    

DOI:10.1080/00319107008084072

出版商:Taylor & Francis Group    

年代:1970

数据来源: Taylor

摘要:

The absolute thermoelectric powers of liquid alloys as a function of temperature and composition are reported for fifteen Bi-, Cd-, In-, Pb- and Sn-base systems.

ISSN:0031-9104    

DOI:10.1080/00319107008084073

出版商:Taylor & Francis Group    

年代:1970

数据来源: Taylor

摘要:

The Epstein-Paskin criterion is examined by reference to a survey of all published data for electrotransport in alloys. The examination supports the general validity of the suggestion that ionic species of highest electron-scattering cross-section are preferentially transported to the anode and, except for transition metals, that the melting point resistivities of the liquid components provide a satisfactory parameter for the scattering cross-sections. It is suggested that the criterion is relevant to electrotransport in solid as well as liquid alloys.

ISSN:0031-9104    

DOI:10.1080/00319107008084074

出版商:Taylor & Francis Group    

年代:1970

数据来源: Taylor

摘要:

Most of the information presently available on the behaviour of electrolyte solutions is confined to aqueous media at 25 ° C and 1 atmosphere pressure.1We have initiated a programme of work to determine quantities such as electrode potentials, conductances and activities of electrolyte solutions in non-aqueous solvents. In particular, we have studied the mobilities and activities of various ions in liquid ammonia solutions within the temperature range −35° to −70 °C.

ISSN:0031-9104    

DOI:10.1080/00319107008084075

出版商:Taylor & Francis Group    

年代:1970

数据来源: Taylor

摘要:

The main work on dense gaseous electrolytes had been done with water as the solvent. The practical application of such electrolytes is limited due to the high critical temperature and pressure of water (374 °C, 217.7 atm). Ammonia, on the other hand, while not as strongly ionizing a solvent as water, has more convenient critical constants (133 °C, 112 atm) and is, in addition, less reactive toward metals than is water. Consequently, it is of interest as a dense gaseous solvent and the properties of dense gaseous ammonia electrolytes are in need of investigation. Silver nitrate was chosen for the present experiment because of its good solubility in NH3and because of the high reversibility of silver electrodes in silver nitrate. The following reports a measurement of the conductivity of a solution of silver nitrate in ammonia over a range of temperatures including the liquid and dense gaseous region.

ISSN:0031-9104    

DOI:10.1080/00319107008084076

出版商:Taylor & Francis Group    

年代:1970

数据来源: Taylor

摘要:

The dielectric permittivity and loss of 6-, 4-, and 2-methyl-1-heptanol have been measured over a wide range of frequency and temperature. The equilibrium polarization of all three isomers and its temperature dependence is similar, which suggests that the type and extent of intermolecular association is also similar. A model of H-bond association to chainn-mers is proposed. Dielectric relaxation is Debye-like for all three liquids; the activation parameters are shown to be sensitive functions of the isomer structure. A qualitative model of relaxation in which H-bond rupture is a prerequisite rather than a rate determining step is proposed. Relaxation in other isomeric octanols and monoalcanols is discussed from this point of view.

ISSN:0031-9104    

DOI:10.1080/00319107008084077

出版商:Taylor & Francis Group    

年代:1970

数据来源: Taylor

摘要:

A simple fast Fourier transformation (FFT) algorithm has been specifically adapted to calculate the experimental radial distribution function. The number of equi-spaced data points must be a power of two [N= 2nfor integern] and must be greater than the Nyquist frequency [N= 2(rmax) (smax)/2π]. When properly defined, the data set is expanded as an odd function. The greatest advantage of the FFT algorithm is its internal consistency—the ability to exactly transform back to the original domain.

ISSN:0031-9104    

DOI:10.1080/00319107008084078

出版商:Taylor & Francis Group    

年代:1970

数据来源: Taylor

摘要:

The measured ratio of the specific heats γ for liquid metals near the melting point and for the liquid insulator argon just above its melting point differ considerably. For metals, γ ∼ 1.2 or 1.3 while for argon γ ∼ 2.2. Furthermore, the measured specific heat at constant volume, per atom, is near to 3kBand always slightly greater, for metals, in contrast to argon for whichCv∼ 2.3kBnear the melting point.

ISSN:0031-9104    

DOI:10.1080/00319107008084079

出版商:Taylor & Francis Group    

年代:1970

数据来源: Taylor