In proper technological conditions and different additional proportion,the effects of adding P_2O_5 and Nb_2O_5 on the high-permeability MnZn ferrites were studied on the basis of microstructure analysis.

The results showed that the problem of F removal out of NbO(H)_5 washing solution from precipitation of high-concentration(Nb_2O_5>120 g/L)Nb solution can be solved through pretreatment with the addition of diluent.

The experiments of laser-clad Fe-based alloy powder doped with and without Nb_2O_5 on medium carbon steel 45 by powder feeding are carried out.

Catalytic combustion of methane was investigated over Ni-Nb_2O_5 and Ni-Cu-Nb_2O_5 catalysts in a fixed micro-bed reactor.

Synthesis of MoO3 nanobelts with no template via a simple hydrothermal method from peroxomolybdic acid sols was reported.

Translucent SiO_2 sols are prepared from TEOS using NH_3·H_2O as catalyzer,polyelectrolyte/ SiO_2 composite films are fabricated via electrostatic self-assembly multilayer method,and SiO_2 thin films are formed by heat-treating the polyelectrolyte/SiO_2 composite films to eliminate the polyelectrolyte and other components in compos- ite films.

The average thickness of the interface layer wrapped about sols usually is determined by fitting the Porod curve that shows a negative deviation from Porod's law.

During the process of peptization and hydrothermal crystallization, the aggregation behavior and the resulting morphology of nanocrystalline titania (TiO2) were studied by X-ray diffraction (XRD), scanning electron microscope (SEM), and dynamic light scattering (DLS) techniques.

The A1(OH)3 sol and Al(0H)3—Zr(OH)4 sol is prepared by peptization method with A1(NO3)3 , ZrOCl2 and NH3H2O as starting materials, using A1(NO3)3 solution and Zr(OH)4 sol as peptizing agents, and the preparation process, preparation conditions and colloid structure are analyzed.