Materials Literature
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Gold nanoparticles have unique optical and chemical properties that make them ideally suited for a number of applications in bionanotechnology, including optical probes, targeted drug delivery, and programmed materials synthesis. The recurring theme is the versatility of gold nanoparticles and how this versatility can…
We demonstrate a compact, linear, and low loss variation hybrid phase shifter using a left-handed (LH) transmission line. For frequencies from 4.3 to 5.6 GHz, this phase shifter gives a nearly linear phase variation with voltage, with a maximum deviation of /spl plusmn/7.5/spl deg/. Within this frequency range, the ma…
Abstract Innovative three-way catalysts containing ceria–zirconia solid solutions (CZ) with a ZrO2 content ranging from 5 to 75 mol% were developed. Such catalysts have very high oxygen storage/release capacity (OSC). The OSC of catalysts containing first-generation CZ was found to increase linearly with the amount of…
Two new mixed-metal tellurites, Na1.4Nb3Te4.9O18 and NaNb3Te4O16, have been synthesized by standard solid-state techniques using Na2CO3, Nb2O5, and TeO2 as reagents. The structures of Na1.4Nb3Te4.9O18 and NaNb3Te4O16 were determined by single-crystal X-ray diffraction. Both of the materials exhibit three-dimensional s…
In vapor-liquid-solid (VLS) growth, it is generally believed that nanowires would grow as long as the right catalysts and substrate are supplied as well as the growth temperature is adequate. We show here, however, that oxygen partial pressure plays a key role in determining the quality of the aligned ZnO nanowires. W…
Polyurethane foam, used as a supporting or insulating material, is sometimes formed in complex molds with significant variations in geometry and size. This work investigates the relationships between cell morphology, density, and mechanical properties in a molded polyurethane material using relatively small cylindrica…
This review focuses on the therapeutic utility of liposomes in the treatment of inflammatory disorders, and aims to offer the reader an overview of the in vivo results obtained with liposomally encapsulated anti-inflammatory and immune suppressive drugs. The past 30 years has clearly indicated the added value of lipos…
Hexamolybdate clusters have been covalently attached, for the first time, to the side chains of conjugated polymers. Two sets of such hybrid conjugated polymers have been prepared, one ( Ia and Ib ) with the clusters linked to the conjugated backbone through a rigid conjugated bridge, the other ( IIa and IIb ) through…
The railway frog made of 1. 14C- 12.72Mn high manganese steel has excellent work- hardening behavior, but it often fails ahead of expected using life because of nose rail spalling during service. It showed by analysis on fracture of railway frog that corrosion- fatigue failure led to surface spalling of frog, and the…
The three dimensional mathematic models of 18- pass continuous hot rolling for 304 stainless steel tod and wire have been established using three dimensional thermomechanical coupled elastic- plastic finite element method (FEM) by commercial finite element software MSC.Marc. The process is simulated using three contin…
The experiment of commercial heat treatment process for 82 mm plate of steel 14Cr1MoR (0. 15C- 1.48Cr- 0.57Mo)has been carried out at Wuyang Iron and Steel. The test results showed that heat- treated with 9℃/min heating up speed, austenite conditioning at 930 ℃ for 2.4 min/mm,water quenching at 870 ℃,and tempering at…
The cold heading steel coil generally is low and medium carbon quality steel and alloy structure steel to manufacture various standard mechanical element and fastener by cold heading forming. As the element and faster are formed by cold heading process, the cold heading steel has high cleanliness, to control Si and Al…
Secondary refining, continuous casting and multi-roll mill technology are three main and important technol- ogies to promote rapid development of stainless steel production in world. Aiming at deformation characteristics of the stain- less steel and basic requirements to the cold rolling mill, the commonly used single…
The true stress - strain curves of Nb- bearing low carbon steel Q345C (0.056C, 1.20Mn, 0.052NB, 0.033V, 0.012Ti, 0.005 2N)52 mm concasting thin slab during high temperature deformation by CSP (compact strip production) rolling have been simulated and studied by Gleeble-1500 thermal simulation tester, and the mathemati…
By using 100 t arc fumace steelmaking with hot metal + pig iron + quality sorap charging, LF secondary refining, concasting billet hot feeding(temperature for heat fumace ≥550 ℃),and automatic determinant system for quali- ty of concasting billet, the S, P content in steel tube blank for high pressure boiler including…
The Φ150 mm microalloy steel 48MnV (0.42～0.47C,0.98～1. 18Mn,0.06～0. 10V,0.008～0.035S, ≤0.025P)was produced by the flow sheet: hot metal pretreatment- 120t converter blow melting- LF refining- 4.8t ingot ca- sting- 800 mill rolling for hot forging at Benxi Steel. The nitrogen content in steel was trimmed by adding N-Mn…
The flux agents in common mould powder normally are fluoride and sodium oxide, both all produce environmental pollution. Therefore the physical properties such as melting point, viscosity, crystallizing properties and surface ten- sional force of mould powder containing flux agent B₂Os were studied. The test results s…
The chemical composition of separating ring and concasting process have been improved by analysis on break of separating ring for horizontal concasting φ130 mm billet for tube and test of effect of separating ring composition on properties. The results showed that with using B-Sis N4+30% BN separating ring, manufactur…
The general chemical compositions of microalloyed intragranular ferrite steels are 0.2~0.4C,0.2～0.8Si, 1.0~1.7Mn,0.05～0. 15V. It is a main measure to increase the strength and toughness of ferite-pearlite microalloyed steel using recrystallized forging and rolling to control cooling rate in phase transformation range…
The numeric simulation of effect of X-shape submerged nozzle on flow of molten steel in a mold for 160 mm x 160 mm concasting billet has been carried out by viscous fluid mechanics theory and CFD software Fluent. It was verified that during pouring with X-shape submerged nozzle, the vortex molten steel entering into m…