Polymers and Organic Materials
Polyaniline/Fe3O4 as conducting/magnetic polymeric composites In daily uses, a polymer is generally known as insulator, both electrically and thermaly. For several types of certain polymers, the electrical conductivity can be dramatically improved which can reach more than 10 orders of magnitude. One type of such polymers is polyaniline (PANi). By doping of a strong acid …. Read More
Semiconducting and Optical Materials
TiO2 powder and its photocatalytic activityTitanium dioxide (titania) nanoparticle were synthesized by coprecipitation process of titanium trichloride (TiCl3) in aqueous medium, with NH4OH as pH regulator. The pH solution was varied during the synthesis process between pH 3-8.4, and all samples were calcined temperature at 400oC for 3 hours. Characteristics and properties of the TiO2 …. Read More
Novel Magnetism and Low-Temperature Physics
Weak ferromagnetism in normal state Bi2Sr2CaCu2O8+d nano-superconductors Superconducting nano powders Bi2Sr2CaCu2O8+d (Bi-2212) was synthesized using a wet mixing method, where all the basic material is completely dissolved using HNO3 solution. The basic ingredients were Bi2O3, SrCO3, CaCO3, and CuO. The PbO2 was also used as dopants to produce powder Bi2-xPbxSr2CaCu2O8+d [(Bi,Pb)-2212]. After being dissolved completely …. Read More
Neutron and X-Ray Scattering, Diffraction, and Spectroscopy
High-resolution neutron diffraction studies on NdxY1−xBa2Cu3O7−δ superconductors A synthesis of neodymium-substituted YBCO superconductor NdxY1−xBa2Cu3O7−δ (x=0,0.25,0.5,0.75,1) has been done using a dissolved method in order to obtain homogeneous crystals and higher critical current density. The effects of the substitutions on the structural and magnetic properties of the superconductors after sintering at 970◦C have been examined. Crystallinity …. Read More
Nanomaterials
The development of co-precipitation method for preparing metal-oxide nanoparticles Powder is very practical materials for further processing, to be used as a bulk, slab, pellet, even film as well as solution or colloid. Price of commercial powder is generally dependent on its purity and fineness of the grain/crystallite size. These factors are associated with the …. Read More
Metals and Corrosion
Zr-based Metallic Glass Oxidation behavior of Zr-based metallic glasses has been studied at temperatures below glass temperature (Tg), crystallization temperature (Tx), and between Tg and Tx in air atmosphere. This behavior affects significantly on the structural stability of the amorphous alloys. At those specified temperatures, the oxidation behavior and crystallization of the amorphous Zr-based …. Read More
Advanced Ceramics
Nano-forsterite powder made of natural silica sand Nano-forsterite powder with natural silica sand and magnesium powder as the raw materials have been successfully synthesized. The silica sand was purified followed by a coprecipitation process to obtain colloidal silica. The magnesium powder was dissolved in a chloric acid solution to obtain MgCl2 solution. The nanoforsterite …. Read More
