Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
This article discusses a simple approach for the microwave-assisted synthesis of good quality nanosized calcium titanate crystals doped with trivalent Tm and Yb lanthanide ions. The prepared nanoparticles had a microcube-like structure and a crystallite size of ca. 47 nm. The structure of the nanocrystals was analyzed…
We present a novel method for the unsupervised estimation of a primitive unit cell, i.e. a unit cell that can’t be further simplified, from a crystal image. Significant peaks of the projective standard deviations of the image serve as candidate lattice vector angles. Corresponding fundamental periods are determined by…
Nanotechnology may offer fast and effective solutions for environmental clean-up. Herein, amphiphilic diblock copolymers are used to develop a platform of photosensitive core-shell nanoparticles. Irradiation with ultraviolet light removes the protective layer responsible for colloidal stability; as a result, the nanop…
It has been investigated that the tiny amount of bound water in anodic oxide film on Al was quantitatively measured by thermal gas desorption spectroscopy (TDS) and correlation between the amount of bound water in the film and stability of the film was discussed. Al wire specimens were anodically polarized at 20.5 V i…
The degradation of malachite green and methyl violet solution was studied using hydrodynamic cavitation. Effect of inlet pressure, oxidizing agent, geometry of the orifice, cavitation number and pH were studied with the aim of maximizing degradation. Studies were done individually and in combination with H2O2. It was…
We have investigated the structural and magnetic properties of the new intermetallic compounds RNiSi3 (R = Dy, Ho) grown by the Sn-flux method, which yields high quality single crystals. X-ray powder diffraction data show that these compounds crystallize in a layered or- thorhombic structure (SmNiGe3-type). Temperatur…
Integration of carbon nanotube (CNT) forests in acoustic wave resonators has appeared interesting for sensing applications. High quality CNTs can be grown on piezoelectric AlN by using a stabilising layer for catalyst nanoparticles.
We report a novel lateral cavity surface emitting laser based on sub-wavelength high-index-contrast grating with in-plane resonance and surface-normal emission. The device is fabricated on a simple commercial wafer without the distributed Bragg reflector and it needs no wafer bonding. It exhibits a side mode suppressi…
Organic Light Emitting Diode (OLED) is one of the developing technologies utilizing organic compounds, especially aromatic compounds with conjugated double bonds. The aims of this research is to study the transformation of N,N-diphenylamine (DPA) to become potential compounds that can be utilized as precursor of OLED…
This publication reports about high-temperature heat transfer in ceramic sponges. Ceramic sponges are open-celled solid network structures with advantageous properties: low pressure drop, high specific surface area, comparatively high heat transfer, and good cross mixing in the fluid. For designing technical equipment…
Summary The aim of this research was to evaluate an effect of surface layer condition of machine parts working in sand on abrasive wear intensity, and particularly comparison of two surface treatments - thermal spraying and laser all oying. The outmost disk coulters of ‘Poznaniak’ seeder were tested. Sp ecial laborato…
We evaluated the size distribution of defects in three types of PAN-based carbon fibres with the different Young's modulus using the lifetime measurement of positron annihilation. It was found that the average lifetimes of positron were around 400 ps in all cases corresponding to the defect size composed by nine or mo…
There is currently a need for better vascular and cardiac repair materials. These materials must be biocompatible and resist rupture, calcification, and degradation. Materials of biological origin such as decellularised tissue have shown the most promise for achieving these characteristics; however, they still suffer…
Ce3+ and Eu2+ activated BaAlSi5O2N7 phosphors have been prepared by the modified three step solid state diffusion method. Prepared phosphors are characterized by XRD, SEM, photoluminescence and thermoluminescence techniques. Upon excitation at 234nm, Ce3+ activated BaAlSi5O2N7 phosphor shows strong emission at 360nm.…
For pressure vessels constructed with low alloy steels which operate at temperatures above 371 ̊C, the fatigue design and exemption rules provided in ASME Boiler & Pressure Vessel Section VIII are no longer applicable. High temperature structure design codes which consider creep effect at elevated temperatures have to…
Alumunium terdiri dari beberapa kelompok yang dibedakan berdasarkan paduan penyusunnya. Alumunium 5083 merupakan paduan alumunium dengan magnesium (Mg), Material aluminium 5083 mempunyai sifat tahan korosi terutama terhadap korosi air laut sehingga banyak digunakan sebagai material bangunan kapal. Perlakuan suhu dapat…
CeCu2Ge2, the magnetic counterpart of the heavy-fermion superconductor CeCu2Si2, exhibits an antiferromagnetic ground state below TN = 4.15 K with an incommensurate propagation vector of τ = (0.28 0.28 0.54). The magnetism is determined by local Ce 4f-moments and the ordering RKKY interaction as well as the onset of K…
Periodic pyramidal array patterned sapphire substrate (PSS) with various inclined facets was fabricated by wet etching. It was found that {3 17}, {4 18}, and {12 5} facets are exposed on the PSS structure after etching. GaN grown on the PSS by metal-organic chemical vapor deposition was found to have a semi-polar orie…
A shortage as well as a rise in costs for raw materials as used for production of derived timber products and fibre composites can be observed for quite some time. Especially the use of wood as energy source has led to an increased demand for cellulose raw materials. Non wood resources e.g. from agricultural productio…
We prepared CuO-Ta2O5 composite films using our simple co-sputtering method for the first time. Four specimens were prepared from an as-deposited CuO-Ta2O5 sample by cutting it using a diamond- wire saw, and the specimens were subsequently annealed at 600°C - 900°C. The X-ray diffraction and photoluminescence (PL) of…