]. Rare earth metal ions such as La 3+ , Ce 3+ , and Nb 3+ have modified the morphology and coercive field values [ 14 ]. In the present investigation, we have used potassium chloride (KCl) as dopant and its effect on the property of TGS crystals are
The reproducibility of the phase changes at 533–543, 573–593K and 603–623 K in the system CuCl2−KCl was investigated by DTA analysis, supplemented with röntgenographic analysis. Conclusions were drawn in connection with
a liquid melt and the solid state of the system.
Authors:A. Atbir, L. Aneflous, A. Marrouche, M. El Hadek, R. Cohen-Adad and M.-Th. Cohen-Adad
Polytherm diagram of the ternary system KCl–FeCl2 –H2 O between 0 and 70C. Phase equilibria in the KCl–FeCl2 –H2 O system were studied over the temperature range 0–70C by conductimetric and analytical methods.
A solubility polytherm of the system was constructed. We have observed the crystallization fields of the KCl and FeCl2 6H2 O (at 0C), KCl and FeCl2 4H2 O (at 15, 30 and 40C) and KCl, FeCl2 4H2 O and of a double salt KClFeCl2 2H2 O are obtained at 70C.
Authors:E. Nurullahoğlu-Atalık, N. Okudan, M. Belviranlı, H. Esen, Y. Yener and Y. Öznurlu
Acrylamide (ACR) is a chemical used in many industries around the world and was found to form naturally in foods cooked at high temperatures. The aim of the present study is to evaluate the influence of ACR treatment on vascular responses to phenylephrine (PHE; 10−9-3×10−4 M) and potassium chloride (KCl; 5–100 mM). We also examined the role of gender in these responses. The animals in both genders were divided into three groups as follows. (1) Control animals, (2) ACR-I; ACR-treated (2 mg/kg-d for 90 days), (3) ACR-II; ACR-treated (5 mg/kg-d for 90 days). Male rat aortas were more sensitive to PHE and KCl than female aortas. ACR-treatment increased the sensitivity to PHE and KCl, in both genders. Compared to the control group, ACR treatment significantly reduced the luminal area of both male and female rat aortas. Furthermore, the responses to PHE and KCl were similar in both 2 mg/kg-d ACR-treated rat aortas with 5 mg/kg-d ACR-treated rat aortas, in both genders. The results of this study suggest that ACR treatment affects vascular contractility and morphology in both gender of rat aorta.
Catalysts of the type carrier-CuCl2, KCl differing in the temperature at which they were obtained and after the ethene oxychlorination process were analyzed thermogravimetrically. Catalysts after the oxychlorination process differed in total salt content and in the molar ratio of CuCl2 to KCl. A number of endothermic processes were observed in the DTA curves, the extents of these varying with change in the temperature at which the catalysts were obtained and in the catalyst composition.
Authors:Sung Park, Dong Cho, Moon Woo, Sung Hwang, Young Kang, Jeong Kim and Hansoo Lee
Uranium dendrites which were deposited at a solid cathode of an electrorefiner contained a certain amount of salts. These
salts should be removed for the recovery of pure metal using a cathode processor. In the uranium deposits from the electrorefining
process, there are actinide chlorides and rare earth chlorides in addition to uranium chloride in the LiCl–KCl eutectic salt.
The evaporation behaviors of the actinides and rare earth chlorides in the salts should be investigated for the removal of
salts in the deposits. Experiments on the salt evaporation of rare earth chlorides in a LiCl–KCl eutectic salt were carried
out. Though the vapor pressures of the rare earth chlorides were lower than those of the LiCl and KCl, the rare earth chlorides
were co-evaporized with the LiCl–KCl eutectic salt. The Hertz–Langmuir relation was applied for this evaporation, and also
the evaporation rates of the salt were obtained. The co-evaporation of the rare earth chlorides and LiCl–KCl eutectic were
Mixtures of CuCl and KCl containing the additives MgCl2, NaCl or CsCl were heated at 473 K in air atmosphere, and then subjected to DTA analysis in the temperature range 293–773 K. The molar ratio of Cu to K in the mixtures varied from 0.5 to 1.0. The influence of the additives on the DTA pictures of the CuCl2-KCl system was observed.
Solid mixtures of CuCl2 and KCl were annealed at 473 K for different times, then cooled down to room temperature and thermogravimetrically analysed.
The differences in the DTA pictures of the samples were analysed. Conclusions were drawn as concerns the solid and liquid
states of the mixtures.
Authors:Fanxing Gao, Changshui Wang, Lisheng Liu, Jianhua Guo, Shangwen Chang, Li Chang, Ruixue Li and Yinggen Ouyang
In the first part, LiCl-KCl-UCl3 and LiCl-KCl-UCl3-UCl4 molten salts were prepared, which were studied employing cyclic voltammetry and chronopotentiometry techniques, respectively.
It was determined that the reduction of U(IV) to uranium metal takes two steps. Firstly, U(IV) is reduced to U(III). Then,
the reduction of U(III) to uranium metal occurs in a step with a global exchange of three electrons. Cyclic voltammetry studies
indicated that at low sweep rates, the reduction of U(III) to uranium is reversible. However, a mixed control of both diffusion
and electrontransfer is observed as the sweep rate increases. The diffusion coefficient of U(III) and the formal potential
of U(III)/U versus Ag/AgCl reference electrode in these two salt systems were calculated respectively. In second part, based
on the data of the electrode processes of uranium ions, electrodeposition of uranium metal was carried out. Uranium deposits
were prepared adopting a 304 stainless steel electrode in the molten LiCl-KCl-UCl3 and LiCl-KCl-UCl3-UCl4, respectively by employing suitable electrolytic techniques. The morphology of the deposits and the cross-section of the
cathode were investigated by SEM. It was determined that at the beginning of the deposition process, uranium product alloys
with stainless steel and forms a thin layer, and then uranium begins to grow adhering to the layer.
Thermal analysis of the binary system KCl-LiCl in the composition range 0.368–0.812 mol fraction of LiCl was studied by differential
scanning calorimetry (DSC). On the basis of the DSC curves, the experimental data for the phase-diagram, the latent heat of
fusion, and the average specific heat in the liquid and solid states are presented as a function of the composition of the
mixture. The experimental results compared with literature data. The following empirical correlation between the heat of fusion
(ΔH) and of compositions of the mixture in mol fraction of LiCl (x) was obtained: ·GH=26.95−50.20x+43.06x2 with a minimum value of 11.8 kJ(g mol)−1 at the eutectic point of 0.587 mol fraction of LiCl at 354.4°C. These results are required as basic data to develop thermal
energy storage materials, based on the phase change of a molten mixture of KCl-LiCI.