The principal and technology of diamond CVD, structure and properties of CVD film, its application prospect and market all are presented with focus on research of diamond CVD hard metals.

The paper overviwed the influence of the iron and aluminum impurities in beryllium in various forms on properties of beryllium materials, and pointed out that the formation of AlFeBe 4 with iron and aluminum by specific high temperature ageing heat treatment can improve the properties of beryllium. It was shown that certain ratio of iron and aluminum is a necessary condition to form AlFeBe 4. Description is made of the preparation of Be raw meterial conforming to specific Fe/Al ratio can be produced by selecting beryllium pearls or controlling acid concentration.

Description is made of the production and present development as well as the prospect and application of Chip Ta capacitors both at home and abroad.

Manufacturing technologies and refinement methods for dysprosium metal were reviewed. The application of dysprosium in NdFeB permanent magnet,rare earth giant magnetostrictive material,magneto optical recording media and other rare earth functional materials were introduced. Some suggestions were given on further research and development as well as mass production of dysprosium metal.

Analysis is made of the features of literatures in full text data base of Chinese publications.Detailed description is made of the design,performance, method and application of the full text data base of the publications.

The extraction behavior of tungsten and phosphorus in alkalescent solution(pH= 7.80 ～8.32) by CL N 1923 LEVEXTREL resin and the conditions for separating the trace phosphorus,arsenic,silicon from the tungsten in impure sodium tungstate solution were investigated.The results of static and dynamic experimental method showed that the resin may separate the trace amounts of phosphorus and silicon from the tungsten in impure sodium tungstate solution effectively.The content of phosphorus、arsenic and silicon in real industrial sodium tungstate solution was decreased to below 0.015,0.030,0.010 g.L -1 from 0.05～0.50,0.04～0.10,0.050～0.30 g.L -1 respectively,the removal rate of phosphorus,arsenic and silicon may get to 97.6%,81.6%,100%,the one pass recovery of high pure tungsten may reach 80%.

Bi Te ore is leached with HCl+NaClO 3 .Leached solution is reduced with Na 2SO 3 to obtain rough Te powder. Reduced solution is hydrolyzed to recover Bi. Rough Te powder goes through purification with 2 mol/L HCl to obtain >96% Te powder.

V_2O_5 is used as raw material,carbon black as reducing agent, the whole process flowsheet for VC was worked out. The obtained product is up to standard.

Various quenching processes have been done to the steel bonded carbide made by a new process before tempering. The tempered alloy was studied for its structure, wear's surface and wear property. The result shows that,the wearability of alloy relates to the dropping of hard phase. The structure of 1 150 ℃ quenched alloy is idealer. It has better wearability after tempering.roperty .Theresul

Fused salt electrolysis for preparation of RE Zn alloy has been studied.while zinc is used as cathode (stirred),RE 8%～zinc alloy is obtained at cathode current density of 3.37 A/cm 2, t 760～790 ℃, RE chloride concentration of 28%～32%