Based on the thermodynamic data, the thermodynamic balance diagrams are drawn for calcium phosphate system under different pH at 298K. Discussion is made on the relationship between solubility and pH in the calcium phosphate salt possibly occurred in the solution. The relationship is found through calculation between the pH and ultimate saturation solution behavior of calcium and phosphate solution and verification is done through test. The super-saturation solution concentration and pH range are obtained.

Presentation is made is made of the excellent properties （such as high activity, good oxidability, energy-saving,low cost and non-toxic） of new TiO2 photocatalyst. The paper briefly describesits nature, structure, catalysis performance, influence factors, doping modification, research and the applications.

The paper reviews the current status of design of niobium-based alloy composition and study of high-temperature oxidation resistance. The paper describes the latest development and existing problems in respect of embedding cementation for coating preparation. In the paper are presented the ways possibly to improve high-temperature oxidation resistance of Nb-Si based alloys.

Brief description is made of the significance of research of nano-WO3 film. The paper reviews nano -WO3 film preparation method and its advantages and disadvantages as well as its latest research,applications and future development trend.

Brief description is made of the new development of Technology for Tungsten Hydrometallurgy by Chenzhou Diamond Tungsten Products Co. Ltd,some suggestions for future technical development are nano-WO3 film put forward.

RE is recovered by sulphuric acid dissolution from NdFeB scrap. Good Co recovery is obtained by sulfiding precipitation from the sulfuric acid solution with high-Fe ＆ low-Co content resultant with the addition of Fe scales,Na2 S and S. And Co content in the precipitate can reach 8 mass % with the optimum conditions as follows：Fe ： Co=1.5,Na2S ： Co=2,S ： Co=0.5,pH=2,t=70 ℃ and duration 1 hour.

The paper describes the principles and process flowsheet of hydrolytic and electrolytic hydrogen making and hydrogen making by natural gas reformation. The results of comparison and technical analysis show that the latter is much more superior in respect of production and it is successfully applied in the P/ M enterprises. The process can take the place of hydrolytic and electrolytic hydrogen making in large P/M plants.

Commercial BeO applicable for Be and Cu master alloy production is produced by control of operation and technical conditions of precipitation, alkali washing, and calcination and also by testing of technical data such as specific surface area, bulk density, and ignition loss, etc.

The nano-crystal composite WO3-TiO2 photocatalyst is prepared by sol-gel process in ultrasonic filed. Study is made of the effects of ammonium tungstate dosage,number of film coatings, sintering temperature and duration, various substrates,pH value,dissolved oxygen and the ultrasonic on the photocatalyric activity in the light of the film photo-degradation of rhodamine B. The results show that when compared with conventional sol-gel process,in the untrasonic field the gelating time of the sol is remarkably shortened, the particle size of the photocatalyst diminishes evidently and the photocatalytic activity increases significantly. The highest photocatalytic activity of WO3-TiO2 film is obtained with ammonium tungstate 0.5 % （mass）, the porous Ti plate as sub strate, 9 layers of film coating, 1 h sintering at 575℃. resulting in the WO3-TiO2 film almost all of rutile TiO2.

La1-xSrxMnO3 cathode material of solid oxide fuel cells is prepared by SHS method. Study is made of the relationship between Sr content and sintered LSM strength and relative density as well as the variation of porosity and expansion coefficient of the sintered specimen with different temperature. It is found that the particle size becomes larger and the relative density is slightly reduced with the increase of Sr content. Higher sintering temperature is good for less porosity. The thermal expansion coefficient of the sintered specimens matches well with that of YSZ.