Showing papers in "Materials Chemistry and Physics in 1993"

TL;DR: In this article, the authors used X-ray diffraction and IR spectroscopy to study the mixed ferrite Li 0.5+0.5−1.5.

TL;DR: In this article, the preparation and characterization of a number of layered zirconium compounds containing inorganic phosphorus groups as well as organic phosphonate groups are described, and a series of amorphous mixedcomponent compounds that are found to be highly selective ion-exchangers toward Cs+, etc.

TL;DR: In this paper, the chemical structure and morphology of carbon deposits contained in complex carbon-mineral adsorbents prepared by pyrolysis of different substances on the surface of mineral adorbents such as silica gels, aluminium oxide, aluminosilicates, porous glasses, etc.

TL;DR: The crystal structures of the title compounds have been determined from X-ray intensity data collected at 200 K with a CAD 4 diffractometer as mentioned in this paper, where the gold-gold distances indicate metal-metal bonding.

TL;DR: In this article, the events leading up to the discovery of crystalline α- and γ-zirconium phosphates are described, along with a brief description of their structures and aqueous ion-exchange behavior.

TL;DR: In this paper, it was shown that a strong non-cubic crystal field splits the 5d excited state, causing the lowest f-d absorption transition to be at a low energy position.

TL;DR: In this paper, it was shown that MnSx inclusions in 18Cr-14Ni stainless steel do not undergo any passivation, thus exposing themselves directly to the aggressive environment and producing large discontinuities within the passivating film at the inclusion/matrix boundaries and at the inclusions themselves.

TL;DR: In this paper, two large batches of ZrPO 4 (H 2 PO 4 ) 1-x [R(PO 3 H) 2 ] x 2 ·nH 2 O were prepared by topotactic reaction between γ-ZrPO4H2PO4· 2H2O and solutions of diphosphonic acids in water-acetone at 80 °C.

TL;DR: In this article, structural data on solids prepared from tetrahedral Cu+ cations in combination with bent bridging ligands, intended to mimic the coordination of oxygen in silicate structures, are also described.

TL;DR: In this paper, a layered structure consisting of Ti(100 nm)/Pt(200 nm)/Au(500 nm) and Au-Sn (2.5 μm total in multiple alternating layers) was studied as a bonding scheme for InP-based laser diodes to chemical vapor deposited (CVD) diamond substrates.

TL;DR: In this paper, the porosity of an anodic oxide layer formed in 15 wt.% sulphuric acid was investigated and a linear relationship was found between the voltage jump and the anodization voltage.

TL;DR: In this article, a thin zinc oxide film (0.3-1 μm) was deposited on quartz and silicon substrates using a spray-CVD system developed in our laboratory.

TL;DR: In this paper, an investigation of the system BaZr1−xInxO3−0.5x has revealed that above 500 °C Ba2In2O5 has an oxide-ion conductivity analogous to that of Bi2O3 and the Zr-substituted compounds a σo analogous to the stabilized zirconias; at lower temperatures both neutral oxygen and water can be reversibly inserted into or extracted from the oxygen vacancies to give an enhanced ionic conduction.

TL;DR: In this article, a method for preparation of Bi2S3 thin films from a nonaqueous medium is developed, in which Bi(NO3)3 and Na2S2O3 are dissolved in acetic acid glacial and formaldehyde, respectively, to prepare equimolar (0.1 M) solutions.

TL;DR: In this article, an aqueous soxhlet extraction procedure was used to surface-clean five commercial silicon nitride powders, and the solid-solution interface properties were characterized before and after extraction by electrokinetic sonic amplitude measurements.

TL;DR: In this paper, it was shown that the ternary Cu Zn/Al catalysts are successfully made via a layer-structured hydrotalcite-like precursor, i.e., (Cu,Zn)6Al2(OH)16CO3·4H2O.

TL;DR: In this paper, the results of XRD and DSC studies on electroless Ni-P deposits obtained from two types of alkaline baths containing ethanolamines are discussed, and it is shown that the exothermic processes responsible for this peak are crystallization of nickel and reorganization of the amorphous matrix.

TL;DR: A review of the general properties of porous silicon that have been reported thus far, along with a discussion of the possible mechanisms for the luminescence process is given in this article, along with the support for and drawbacks of each particular model.

TL;DR: In this paper, the dielectric properties of the composite samples were measured in the frequency range from 6-300 kHz and the results reveal that the dieectric loss index values of the samples are associated with water molecules adsorbed on the silica surface.

TL;DR: In this article, the ability of layered α- and γ-zirconium phosphates to intercalate directly some insulating oligomers (PEG 300 Da, PEG 600 Da) or polymers (PEO 2 × 10 5 Da, PEI 6 × 105 Da) has been investigated, and the composites were characterized by H, C, N elemental analysis, XRD powder patterns at room and high temperature and TG-DTA coupled analysis.

TL;DR: In this article, the effects of particle size, particle concentration in the bath, current density, pH and temperature on volume percent (vol.%) incorporation of V 2 O 5 particles in the composite were investigated.

TL;DR: In this article, the authors used the liquidus minimum for the Ti-Si binary system and showed that a sufficiently high concentration of oxygen in amorphous silicon can lead to formation of NiSi instead of Ni2Si.

TL;DR: In this article, the reaction of Al(H 2O)63+ and [Al13O4(OH)24(H2O)12]7+ with α-Ti(PO4)2·2RNH3·H 2 O (R = C3H7, C4H9) has been investigated.

TL;DR: A series of layered compounds of general composition VO(C n H 2 n +1 PO 3 ) · y H 2 O ( y = 1.5, 1 ⩽ n ¼ 3; y = 0.5H 2 O) has been synthesized by hydrothermal reaction of V 2 O 3 and the corresponding alkylphosphonic acid in water at 200 °C.

TL;DR: In this article, a plasminoxane thin film of about 30-5000 nm thickness has been deposited from organometallic molecules using a plasma enhanced chemical vapour deposition (PECVD) process.

TL;DR: In this article, the lifetime of W stud chains is less than a half of that of Al-Cu flat lines, while the lifetime is affected by grain size, grain morphology and bend structure in submicron metal lines.

TL;DR: In this paper, a new chemical solution has been developed to delineate crystallographic defects in thin silicon overlayers of fully annealed SIMOX material, based on the HF:HNO3:H2O system and has proved to be superior to other etchants based upon dilute Secco solutions.

TL;DR: In this article, single crystals of TGS were grown in silica gel using the solubility reduction method and the laser Raman and FTIR spectra of the TGS and Zn-doped TGS crystals were recorded.

TL;DR: In this article, the authors investigated the crystallization of co-sputtered Si-Al amorphous alloys by transmission electron microscopy (TEM), differential scanning calorimetry (DSC), optical microscopy and X-ray diffraction.

TL;DR: In this article, an ac microindentation technique with a small displacement modulation superimposed on an otherwise linear indenter motion is introduced. And the authors also use a mechanical model to simulate the indenter behavior and obtain the unloading slope simultaneously and continuously with the penetration depth and applied load during an entire indentation process.