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Higher strength electrical porcelain is a requirement of industry. This will be achieved by a specific composition of raw materials, which is consisted of clays and feldspars. Water absorption, particle size and insulating properties are of special interest now a day. China clay, Ball clay and Quartz are widely used by ceramic industries in Bikaner district of Rajasthan. Sample for present study were prepared by mixing of above clay, feldspar with MnO2, then shrinkage is observed. Bar shaped samples were prepared and heated up to a temperature of about 1185° C to observe shrinkage. For phase study of XRD and SEM are observed. [ABSTRACT FROM AUTHOR]

Material science is one of the important fields where, absorption spectra of lanthanide ions have been a subject of several investigations because of their possible use as laser materials, diagnostic tools and sensors. Study of absorption spectra in visible and near infrared regions yields useful information regarding energy and intensity parameters, and nature and probabilities of transitions. Chemical physics provides fundamental tool to develop lanthanide chemistry, which has been increasingly significant in the last few years due to the wide variety of potential applications of their complexes in many important areas of biology and medicines. The present work describes the development of a novel method of composite preparation based on clay and its physiochemical characterization. Simultaneous measurement of some thermal properties has made study more useful. Results match with accepted models. [ABSTRACT FROM AUTHOR]

Excessive utilization of petrol, diesel and other fossil fuels, continuous increase in their prices, and the big problem of carbon dioxide mission have encouraged scientists and technologist to find either new sources of energy or to develop technologies for the sustainable utilization of fuel. Biofuels are the only energy technologies that can resolve the problem of carbon dioxide emission in the atmosphere as well as reduce the amount of fossil fuel burned. Bio ethanol and biodiesel are the most common types of biofuel which are being used at present. Biodiesel has become more interesting for all the researchers in present scenario. Various feedstock viz. edible, nonedible oils, waste cooking oil, animal fat, algae etc, are using for the production of biodiesel worldwide according to their availability. Selection of efficient heterogeneous catalysts for biodiesel preparation still needs more attention of researchers. The present investigation deals with determination of synthesis, characterization and applications of doped ceramic based materials in different medium. Two of doped ceramic based catalysts which has been potentially used for the production of biodiesel. The Engine performance of biodiesel samples, made from industrial waste oils and ceramic based catalyst, have also been investigated and found up to satisfactory levels. [ABSTRACT FROM AUTHOR]

Higher strength electrical porcelain is a requirement for industry. This will be achieved by a specific composition of raw materials, which is consisted of clays and feldspars. High mechanical resistance, low porosity and water absorption are among their important properties. By decreasing the silica and increasing the alumina provides a higher mechanical strength in porcelain but on the other hand increases the body's baking temperature. Therefore adding MnO2in different percentage is a suitable and practical solution to improve strength without increasing sinter temperature. Results have shown that addition of 1% MnO2in body enhances mechanical strength of the body. [ABSTRACT FROM AUTHOR]

The high spin states of 131Ba have been populated in the fusion evaporation reaction 122Sn(13C,4n)131Ba at Ebeam = 65MeV. The γ transitions belonging to various band structures were detected using an array of fifteen Clover Germanium detectors. Some of new transitions have been placed in high spin states. Spin and parity for a band has been calculated for first time in 131Ba. The said band is interpreted in term of multi-quasiparticle configurations, based on Total Rothian Surfaces (TRS) calculations. [ABSTRACT FROM AUTHOR]

The pre-scission neutron multiplicities have been studied for 16,18O+194,198Pt at 50, 61, 71.7, 79 MeV excitation energy populating 210,212,214,216Rn compound nuclei having fissility 0.735, 0.732, 0.729, 0.726 respectively. Fission Time scales were extracted from the measured pre-scission neutron multiplicity and statistical model PACE2. The effect of fissility on fission time scales has been measured. It is found that fission time scales increases in a consistent way with fissility of the compound nuclei (CN) populated. The fission delays extracted for different CN are in good agreement with earlier published data for heavier systems [1, 2]. In the present work it is shown systematically that the fission time scales generally increases with fissility value of CN. [ABSTRACT FROM AUTHOR]

Simultaneous measurement of effective thermal conductivity (λ), effective thermal diffusivity (κ) and specific heat of Ker fiber reinforced phenol formaldehyde composites have been studied by transient plane source (TPS) technique. The samples of different weight percentage typically (5, 10, 15, 20 and 25%) have been taken. It is found that values of effective thermal conductivity and effective thermal diffusivity of the composites decrease, as compared to pure phenol formaldehyde, as the fraction of fiber loading increases. Experimental data is fitted on Y. Agari model. Values of thermal conductivity of composites are calculated with two models (Rayleigh, Maxwell and Meredith—Tobias model). Good agreement between theoretical and experimental result has been found. [ABSTRACT FROM AUTHOR]

The compound nucleus 76Kr* was populated at the excitation energy of 75 MeV and angular momentum of 39 h in fusion reactions with two complementary, mass-symmetric (31P+45Sc) and mass asymmetric (12C+64Zn) entrance channels. The neutron evaporation spectra were measured and compared with the predictions of the statistical model calculations. The results for the mass-asymmetric reaction are found to be consistent with the predictions of the statistical model calculations. However, for the mass-symmetric reaction (31P+45Sc), the experimental spectra are found to be harder than the theoretical neutron spectra. The dynamical model calculations of Feldmeier show that the formation time for the compound nucleus for the symmetric system is relatively larger as compared to the asymmetric system. © 2004 American Institute of Physics [ABSTRACT FROM AUTHOR]

We investigate the properties of a condensed-matter system modeled as an ideal atomic Fermi gas with a synthetic spin-orbit coupling. The coupling has been taken to be isotropic and possessing an infinitely degenerate ground state manifold given by a sphere in momentum space is 3D analogue of the Rashba-type. It is found that the chemical potential of such a system exhibits an anomalous behavior typically akin to dimensional reduction. The study shows that some other properties also get affected by the SO coupling and the effects could be attributed to be thermodynamic signatures of Majorana fermions. [ABSTRACT FROM AUTHOR]

The evolution of core-shell structure has been followed through a sequence of annealing treatments. The core-shell structure has been realized through X-ray diffraction. These measurements are further supported by magnetization data that reveal ferromagnetic behavior at room temperature. [ABSTRACT FROM AUTHOR]