Materials Literature
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The morphology of crack fronts stopped during their propagation at pinning microstructural obstacles in two different metallic alloys is analysed, and their "in-plane" roughness index is determined for the first time. In the case of the 8090 Al-Li alloy, which has a very anisotropic microstructure, the roughness of th…
Abstract Takedaite, Ca 3 B 2 O 6 , has been found in crystalline limestone near gehlenite−spurrite skarns at Fuka, Okayama Prefecture. It occurs as aggregates of granular crystals up to 0.8 mm long and 0.3 mm wide. The mineral is associated with nifontovite, olshanskyite, pentahydroborite, frolovite, sibirskite, calci…
The solid‐state reaction; was conducted between 1458 and 1719 K in air . The reaction obeyed the parabolic rate law and the diffusion of yttrium ion controlled the reaction.According to Wagner's theory, the diffusion coefficient of yttrium ion Y 3+ in was evaluated using the Gibbs free energy change of the reaction an…
In this paper we report the first hyperpolarizabilities (beta) of 12, sulfophthalein dyes. Since these dyes are ionic in nature, their second-order nonlinearities were measured by the hyper-Rayleigh scattering technique in solution. The measured beta values are large and highly solvent dependent. Inclusion of solvent…
High‐purity, chemically prepared barium titanate was doped with 0.3 at.% lanthanum and, in some cases, counterdoped with 0.04 at.% manganese by precipitation. Using standard techniques, tape‐cast sheets of the positive temperature coefficient of resistance (PTCR) compositions as well as the base insulating powder were…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLayer-by-Layer Construction of SiOx Film on Oxide SemiconductorsHiroaki TadaCite this: Langmuir 1995, 11, 9, 3281–3284Publication Date (Print):September 1, 1995Publication History Published online1 May 2002Published inissue 1 September 1995https://pubs.acs.org/doi/10.1021/la…
The successful fabrication of metal/dielectric multilayer filters requires not only accurate control of the individual layer thicknesses, but also a good knowledge of the optical constants of the materials used in the filters. In the case of metal films, it is also essential to know whether any transition layers are f…
This paper describes recent work by the authors on a continuum model for crystal twinning. Twinning is described as an anti-plane shear deformation with discontinuous strains, governed by an elastic potential with multiple wells. Possible shapes of twin lamellae and twinning steps and various regimes of their steady d…
A new ionic liquid crystal system, based on compounds with the viologen group (for example, 1–2: Cr 190 SA 280 dec.) has been synthesized, and is found to exhibit the smectic A phase.
Two sol‐gel routes have been used to prepare celsian (BaAl 2 Si 2 O 8 ) precursors. The crystallization behaviors of unseeded gels and the gels seeded with 5 wt% feldspar, rutile, LiAISi 2 O 2 , and ZrO 2 crystals as well as SrAl 2 Si 2 O 8 gel have been studied using X‐ray diffraction (XRD), scanning electron microsc…
Lead magnesium niobate titanate (PMN-PT) thin films were prepared on Pt-coated magnesium oxide single-crystal substrate (Pt(100)/MgO(100)) and Pt- and Ti-coated oxidized Si wafer (Pt(111)/Ti/SiO 2 /Si(100)) at 680-780° C by metalorganic chemical vapor deposition (MOCVD). The PMN-PT thin films comprising perovskite str…
The radial distribution function of a new form of amorphous diamond, synthesized from ${\mathrm{C}}_{60}$ fullerene by shock compression and rapid quenching, was obtained from an electron diffraction pattern using an imaging plate. The present amorphous diamond was essentially amorphous material based on diffractometr…
Grain growth of ZnO during liquid‐phase sintering of a ZnO‐6 wt% Bi 2 O 3 ceramic was investigated for A1 2 O 3 additions from 0.10 to 0.80 wt%. Sintering in air for 0.5 to 4 h at 900° to 1400°C was studied. The AI 2 O 3 reacted with the ZnO to form ZnAl 2 O 4 spinel, which reduced the rate of ZnO grain growth. The Zn…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTwo New One-Dimensional Antiferromagnetic Nickel(II) Complexes Bridged by Azido Ligands in Cis Positions. Effect of the Counteranion on the Magnetic PropertiesJoan Ribas, Montserrat Monfort, Carmen Diaz, Carles Bastos, Christine Mer, and Xavier SolansCite this: Inorg. Chem.…
Highly [100]-oriented Pb(Zr, Ti)O 3 (PZT) films were prepared on (100) GaAs and (100) Si substrates with MgO buffer layer by pulsed laser ablation (PLA). The depth profile of the constituent elements observed by X-ray photoelectron spectroscopy (XPS) shows that there are no remarkable interdiffusion and/or no formatio…
Capacitance aging under dc field has been studied on BaTiO 3 -based dielectrics with X7R characteristics for multilayer ceramic capacitors with Ni internal electrodes. Capacitance change strongly depends on additives and firing conditions as well as microstructure. Aging behavior under no dc field is well explained by…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSonochemical Stripping VoltammetryNanette A. Madigan, Tammy J. Murphy, John M. Fortune, Carolynne R. S. Hagan, and Louis A. CouryCite this: Anal. Chem. 1995, 67, 17, 2781–2786Publication Date (Print):September 1, 1995Publication History Published online1 May 2002Published in…
This paper describes the growth and properties of micro-machined semiconductor microbolometers. These thermally isolated structures are employed in uncooled infrared detectors developed at the Defence Science and Technology Organisation (DSTO). Recent research is focused towards developing high performance bolometers…
Langmuir
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and Characterization of Group 13 and 15 Selenolates and Tellurolates and the x-ray Crystal Structures of Ga[TeSi(SiMe3)3]3, In[SeC(SiMe3)3]3, {In[SeSi(SiMe3)3]3}2(.mu.-DMPE), and P[SeSi(SiMe3)3]3Stephen P. Wuller, Allen L. Seligson, Gregory P. Mitchell, and John Ar…