Crystal structure of dibarium pentaborate chloride, Ba2B5O9Cl
, a = 11
Materials Literature
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Chemical Pressure
The physical and photophysical properties of three classic transition metal complexes, namely [Fe(bpy)3]2+, [Ru(bpy)3]2+, and [Co(bpy)3]2+, can be tuned by doping them into a variety of inert crystalline host lattices. The underlying guest-host interactions are discussed in terms of a chemical pressure.
Quantitative measurement of channel temperature of GaAs devices for reliable life-time prediction
The channel temperature of Gallium Arsenide (GaAs) devices was quantitatively measured using scanning thermal microscopy (SThM), which is a variation of atomic force microscopy (AFM). The temperature of the devices was also characterized by infrared (IR) imaging and thermal modeling. The measured SThM temperature valu…
Properties and processibility of compact yarns
The effect of winding speed on the properties of ring and compact yarns produced using the same mixing, preparatory process parameters and spinning parameters has been studied. Both wet and dry splicing techniques were used during winding to study the structure and properties of the spliced portions of the yarns. The…
Preparation and Properties of Tin(IV) Complexes with the Sulfur-Rich Dithiolate C3S5 and C8H4S8 Ligands and Their Oxidation
Abstract [NMe4]2[Sn(C3S5)3], [NBun4]2[Sn(C3S5)3], [NBun4]2[Sn(C8H4S8)3], [NEt4][Sn(Bun)(C8H4S8)2] and [NBun4][Sn(Ph)(C8H4S8)2] [C3S52− = 4,5-disulfanyl-1,3-dithiole-2-thionate(2−) ; C8H4S82− = 2-{(4,5-ethylenedithio)-1,3-dithiole-2-ylidene}-1,3-dithiole-4,5-ditholate(2−)] were prepared by reactions of Na2[C3S5] or Na2…
Insulating materials evaluation for Cold Dielectric superconducting cables
The realisation of the so-called "cold dielectric" cable, where the insulation is kept at a cryogenic temperature, entails the choice of an optimised insulation system, with properties that are the best compromise between physical-electrical characteristics and design requirements. To this purpose, a specific study wa…
The thermal reactions of montmorillonite: a Mössbauer study
Abstract The physical properties of three montmorillonites before and after heating were studied by reflectance colorimetry, X-ray diffraction (XRD) and infrared (IR) and Mössbauer spectroscopies. Colorimetric data, though not directly relatable to sample mineralogy, provide cheap and rapid information on the temperat…
Magnesium Phosphate (Mg3(PO4) 2) by XPS
The XPS spectra of magnesium phosphate were collected on a VSW HA150 using monochromatic Al Kα x-radiation. The valence band region shows the characteristic features of the orthophosphate ion and is in good agreement with previous data in the literature. The reported regions are as follows: survey, O 1s, C 1s, P 2s, P…
Influence of hydrogen on SiO2 thick film deposited by PECVD and FHD for silica optical waveguide
Abstract Silicon dioxide (SiO 2 ) thick films have been deposited by plasma enhanced chemical vapor deposition (PECVD) and flame hydrolysis deposition (FHD). PECVD SiO 2 films were obtained at low temperatures (<350 °C) by the decomposition of the appropriate mixture of (SiH 4 +N 2 O) gases under suitable rf power…
A study of nanocrystalline yttrium oxide from diffraction-line-profile analysis: comparison of methods and crystallite growth
An analysis of the microstructure of nanocrystalline yttrium oxide produced by thermal decomposition of a double oxalate yttrium and ammonium, at temperatures in the range 600 °C to 900 °C, is described. The study is based on line broadening analysis carried out with the (Voigt/Langford) integral breadth and Fourier m…
Martensitic transformation and work hardening of metastable austenite induced by abrasion in austenitic Fe-C-Cr-Mn-B Alloy - a TEM study
The martensite transformation and work hardening of metastable austenite induced by abrasive wear in an austenitic Fe-C-Cr-Mn-B alloy were studied by TEM. The results show that an α' martensitic transformation occurred to form an elongated and equiaxial cellular dislocation substructure and the untransformed austenite…
STUDY OF THE PICKLABILITY OF 1.8 mm HOT-ROLLED STEEL STRIP IN HYDROCHLORIC ACID
After the hot rolling process the steel strip remains covered with an oxide layer (scale) which must be removed previous to the cold rolling process. The scale removal through the pickling process by hydrochloric acid (HCl) depends on both the scale structure and the conditions of the pickling bath (temperature, acid…
Chlorinated poly(vinyl chloride) and plasticized chlorinated poly(vinyl chloride)—thermal decomposition studies
Abstract The thermal decomposition of chlorinated poly(vinyl chloride) and three plasticized chlorinated poly(vinyl chloride) systems has been investigated. The routes of decomposition of these systems have been elucidated by investigating char formation and by using a combination of thermogravimetric analysis (TGA) a…
Diffraction by a randomly rough knife edge
The intent of this paper is to predict the effects of random edge roughness on the knife-edge diffraction of an incident wave. This has been accomplished by approximating the field beyond the diffracting half plane with spectral techniques and the Kirchhoff approximation. By restricting the point of observation of the…
Occurrence of trona in alkaline soils of the IndoGangetic Plains of Uttar Pradesh (U.P.), India
Efflorescent crusts consisting predominantly of the sodium carbonate minerals trona (Na 2 CO 3 NaHCO 3 2H 2 O) with minor thermonatrite (Na 2 CO 3 H 2 O) are commonly developed on less vegetated portions of the Indo-Gangetic Plains of the state of Uttar Pradesh in India.
Characterization of Fe–Cr Alloys for Reduced Operation Temperature SOFCs
Abstract Chemical stability of ferritic (Fe–Cr) alloy interconnect material was examined under anode gas atmospheres for use in solid oxide fuel cells (SOFCs). In H 2 –H 2 O and CH 4 –H 2 O atmospheres, oxide scale layers were formed on the alloy surface. The surface morphology of the alloy was varied with forming oxi…
Enzymatic Ring‐Opening Polymerization of Oxiranes and Dicarboxylic Anhydrides
Abstract Oxiranes, such as glycidyl phenyl ether, benzyl glycidate, glycidyl methyl ether, and styrene oxide, were copolymerized with dicarboxylic anhydrides, such as succinic anhydride, phthalic anhydride, and maleic anhydride, by the action of an enzyme in a stepwise reaction to produce the corresponding polyesters…
Dielectric behavior of insulating materials under liquid nitrogen
Measurements were made to assess the AC breakdown voltages in liquid nitrogen (LN/sub 2/) with different electrode configurations such as sphere-sphere, needle-needle, hemisphere-hemisphere, plane-plane, sphere-needle, etc. Experimental results reveal that the breakdown voltage is a function of electrode geometry and…
THE INFLUENCE OF SYNTHESIS PARAMETERS ON THE PRODUCTION OF MULTIWALLED CARBON NANOTUBES BY THE FERROCENE CATALYZED PYROLYSIS OF TOLUENE
A high yield (∼32 wt.%) of multiwalled carbon nanotubes was obtained in an iron catalyzed reaction. This was achieved in the temperature range 800–1000°C under an atmosphere of H2/Ar by an improved solution injection method in a horizontal reactor using toluene as carbon source and ferrocene as catalyst precursor. The…
Transmission and Analytical Electron Microscopy Evidence for High Mg Contents of 1M Illite: Absence of 1M Polytypism in Normal Prograde Diagenetic Sequences of Pelitic Rocks
Abstract The normal prograde diagenetic and low-grade metamorphic sequence of dioctahedral clay minerals including illite-rich I-S and illite, as observed by TEM, proceeds from a partially disordered 1 M d stacking sequence to 2 M 1 ; i.e. 1 M does not normally occur as an intermediate polytype. Examples of 1 M illite…