In this study, a glass ceramic with a nominal composition 58ZnO:4Bi₂O₃:4WO₃:33.3B₂O₃ was synthesized by melt quenching technique. A gas sensor was then manufactured using a ZnO sol-gel phase as a permanent binder of the glass-ceramic to an alumina substrate having interdigitated electrodes. The film sensitivity towards humidity, NH₃, H₂ and NO₂ was studied at different temperatures. X-ray diffr...

The paper describes the chemical modification of PVC consisting in introduction amino groups (1,4-dioxane, diethylenetriamine), and then cross-linking with dichlorodiethyl ether. optimal extraction time was obtained for polymer that had more chlorine atoms substituted diethylenetriamine polymers were characterized by infrared spectroscopy (FTIR), elemental analysis (CHN) differential thermal (D...

Since phase changes generally result in dimensional changes, the temperatures at which the phase changes occur in waxes and the influence of adding one wax to another are important in understanding the behavior of waxes. Differential thermal analysis (DTA) offers a useful tool in the study of phase transitions. This study examines the temperature of phase transitions for various commercial, den...

Polyester (P), cotton (C) and Polyester-Cotton (PC) blended fabrics were treated with 350gpl of phosphorous containing flame retardant (FR) chemical. Oxidative thermal degradation of these fabrics before and after the treatment was studied using Thermogravimerty (TG) Differential Thermal Analysis (DTA). From TG output, quantitative mass loss of samples was calculated at definite temperature int...

CuO nano particles were obtained by calcination of nano-sized  [Cu(C4H4O4)(bipy)(H2O)2].2H2O (1) and [Cu(2‚2′-bipy)](C4H4O4)0.5(NO3)(H2O) (2) which are two  Cu(II) coordination polymers. The two coordination polymers [Cu(C4H4O4)(bipy)(H2O)2].2H2O and [Cu(2‚2′-bipy)](C4H4O4)0.5(NO3)(H2O) were synthesized and characterized by Fourier transform infrared spectra (FT-IR spectroscopy), thermal gravim...

Thermal conductivity of superconducting MgB 2 was studied in both the superconducting and the normal state region. The latter is almost equally determined by the electronic-and the lattice contribution to the total thermal conductivity. In the superconducting state, however, the lattice contribution is larger. The electronic thermal conductivity below T c was derived from the experimental data ...

Differential thermal analysis (DTA) and dielectric measurements have been performed on 2,2-dimethyl-l-propanol (neopentanol) up to 200 MPa. Neopentanol exhibits at least one orientationally disordered (ODIC) phase (solid I) that transforms at lower temperatures to a non-plastic phase (solid II). There is evidence of a further O D I C phase denoted as solid I'. The pressure dependence of the pha...

The first laboratory synthesis of hard materials such as diamond proceeded to attack of developing materials with high hardness to compete diamond. Boron rich solids are good candidates owing to their short interatomic bond lengths and strong covalent character. Boron containing hard material was synthesized by modifiedmicrowave method under nitrogen atmosphere by using a fuel (glycine or urea)...

Potato Micropropagation Medium (PMM) is the growth medium used for in vitro micropropagation of potato tubers. The present study was intended to assess the effect of biofield energy treatment on the physical, thermal and spectroscopic properties of PMM. The study was attained in two groups i.e. control and treated. The control group was remained as untreated, while the treated group was receive...

The Schiff base complexes of Pb(II) and Sn(II) with bidentate (NO), [M(sal-An)2] (sal-An = aniline salicylideneiminato); tridentate (ONO), [M(sal-OAP)H2O)] (sal-OAP = orthoaminophenol salicylideneiminato); and tetradentate (N2O2), [M(sal-o-phdn)] (sal-o-phdn = N,N'-ophenylene bis(salicylideneiminato) have been synthesized. The infrared spectra were recorded and full assignments of all observed ...