NOPR Collection:

X-ray diffraction studies of Ga₂Te₃

Thu, 01 Feb 2001 00:00:00 GMT

Title: X-ray diffraction studies of Ga₂Te₃ Authors: Singh, D P; Khan, M Y Abstract: Compound Ga₂Te₃ was prepared from the melt of initial elements of purity > 99.999% and characterized by powder and single crystal techniques of X-ray diffraction analysis. Powder X-ray pattern was obtained up to sin θ/λ =0.634Å^-1 and indexed. The powder data were corrected and explained on the findings of single crystal, obtained from the polycrystalline ingot. The studies revealed that it crystallized in the cubic form of zinc blende structure with a_o=5.8984A, Z= 1.333, space group F43m and D_x=5.668 g/cc. Single crystals exhibited the property of cleavage along < 11> and twinning a long < 10 > directions. Page(s): 46-49

Electrical characterization of superionic materials in the system (Cu_1-xAg_xI)-(Ag₂O)(P₂O₅), (0.05 ≤ x ≤ 0.25) for solid state batteries

Thu, 01 Feb 2001 00:00:00 GMT

Title: Electrical characterization of superionic materials in the system (Cu_1-xAg_xI)-(Ag₂O)(P₂O₅), (0.05 ≤ x ≤ 0.25) for solid state batteries Authors: Suthanthiraraj, S Austin; Murugesan, S; Maruthamuthu, P Abstract: Superionic materials in the system 30(Cu_1-xAg_xI)-46.66(Ag₂O)-23.33(P₂O₅), where x = 0.05, 0.1, 0.15, 0.2 and 0.25 respectively, were prepared using the melt quenching process. The electrical conductivity measurements were made in the temperature range 295-445 K by the complex impedance method. The room temperature electrical conductivity values observed for five different samples of the system are found to be of the order of 10^-6 to 10^-4 Scm^-1. The best conducting composition was found to exhibit an electrical conductivity as high as 1.15×10^-4 Scm^-1 at 295 K. From the temperature-dependent conductivity studies, the values of activation energy of these materials are found to be less than 0.5 eV. The ionic transport number (t_i) values for these materials are found to be greater than 0.96. These measurements confirm the formation of superionic materials in this system and their suitability for battery applications as solid electrolytes. Page(s): 57-58

Microwave absorption study in some iodine doped polyblends

Thu, 01 Feb 2001 00:00:00 GMT

Title: Microwave absorption study in some iodine doped polyblends Authors: Meghal, Priya; Ubale, Seema; Adgaonkar, C S Abstract: Dielectric constant (ɛ') and dielectric loss (ɛ") were determined at a microwave frequency of 9.586 GHz (X-band wavelength of 3cm.) for iodine doped polyblends of polystyrene (PS) and polymethylmetha-acrylate(PMMA). These values increased with iodine percentage. This can be attributed to the complex formation in polymer due to iodine doping. Page(s): 55-56

Charge decay and relaxation times in electrets

Thu, 01 Feb 2001 00:00:00 GMT

Title: Charge decay and relaxation times in electrets Authors: Dhaliwal, Amarjit S; Mann, K S Abstract: In the present communication, the decay of surface charge density of bees wax and the role of a variety of relaxation times in describing the nature of charge carriers have been studied in detail. Thermo-electrets of bees wax were prepared under different conditions of polarizing field, temperature and time. The results of present investigations show that a single line does not fit the complete exponential decay of the surface charge. The values of decay constants range from 2.0×10² sec to 1.3×10⁷ sec. Due to the presence of a large number of dipoles and ions of different kinds in bees wax, a number of dipole relaxation frequencies are expected. Page(s): 53-54

NOPR Collection:

X-ray diffraction studies of Ga2Te3

Electrical characterization of superionic materials in the system (Cu1-xAgxI)-(Ag2O)(P2O5), (0.05 ≤ x ≤ 0.25) for solid state batteries

Microwave absorption study in some iodine doped polyblends

Charge decay and relaxation times in electrets

X-ray diffraction studies of Ga₂Te₃

Electrical characterization of superionic materials in the system (Cu_1-xAg_xI)-(Ag₂O)(P₂O₅), (0.05 ≤ x ≤ 0.25) for solid state batteries