Nano-sized powders were synthesized by hydrothermal method using ZrOCl4 ·8H20, Y（NO3）3 and ammonia as hydrotheraml precursor raw materials and water/mineralizer solutions as hydrothermal medium. The phase constitution and physical properties of YSZ powders were tested by the X-ray diffraction, scanning electron microscope and so on. The effects of hydrothermal process, the types and concentration of mineralizers,and organic surface activator on the agglomeration of nano-sized YSZ powders were in vestigated and some solutions were suggested accordingly.

Solidification behavior of LaFe13-x-ySixCoy Valloys was investigated by induction melting. Phase formation and structure in induction melted LaFe13-x-ySixCoy alloys have been investigated by means of power X-ray diffraction analysis （XRD） and scanning electron microscopy （SEM）. The results have shown that the phase is a peritectic phase. The solidification behavior of LaFe13-x-ySixCoy alloys is greatly affected by overcooling and amount of Si and Co additive. La（Fe,Co and Si ）13 phase occurs with x=1. 5 and overcooling temperature T≥40 K,as is interpreted by the classical nucleation theory.

In view of the theory of interaction between the liquid metals and hydrogen, theoretical derivation is made from absorption kinetics of tritium from liquid Pb-7Li. The results show that the tritium release is resulted from complex influences of the surface reaction, diffusion and convection of the molten alloy. Based on the derivation;the design is presented for the out-pile reactor tritium release experiment after irradiation from Pb-17Li,including process design and description,design of experimental conditions and parameters. And the target and problems to be solved are also presented in respect of out-pile reactor tritium release experiment. In order to provide technical back-up for the planned experiment, investigation is made into the influence of the carrier gas composition, flow rate, flow mode, breeder temperature on the chemical form and yield of released tritium from Pb-17Li as well as the change of Pb-17Li material properties before and after irradiation.

The complex of N-isopropylacrylamide and styrene copolymeric microgel P（NIPAM-co-St） with Sm was prepared by soapless emulsion polymerization. The complex was characterized by transmission electron micrography （TEM）, dynamic light scattering （DLS）, Zeta potential, UV spectrum, IR spectrum and fluorescence spectrum. The results showed that the mierogel particle size and surface morphology had no remarkable change after the Samarium addition and samarium interacted with microgel mainly by electrostatic action. Effective energy transfer failed due to unmatched energy level between microgel and Sm （Ⅲ）.

Study is made on V and Mo precipitation efficiency from the V-H2O/Mo-H2O system, Al-V- H2O）/Al-Mo-H2O system and Al-V-Mo-H2O system with CaO,CaCl2 ,MgSO47H2O,Fe2O3 ,CDJ as the precipitators. The results show that in V-H2O/Mo-H2O system,V and Mo precipitation efficiency with CaO and CaCl2 are better than that in Al-V-H2O/Al-Mo-H2O system. Thermodynamics calculation indicates that reason is that Ca^2＋ reacts with Al in solution to form various calcium aluminate. The CDJ is very effective for V and Mo fractional precipitation from alkali solution in Al-V-Mo-H2O system under controlled test conditions and with controlled dosage of CDJ.

The effect of rolling process on microstructure and property of molybdenum sheet was investiga- ted by changing rolling capacity, rolling temperature and rolling process. The results show that the longitudinal and transverse microstructures and properties of molybdenum sheet are similar by high-rate blooming and low temperature alternative rolling process. Meanwhile, the sheet can be adapted to the downstream operation.

Effect of doping on microstructure and property of tantalum bar and wire is carefully investigated through observation of microstructure and SEM fractograph. The results show that with the increase of the dopant,the tantalum bar grain is refined,and the degree of grain refinement with dopant B is higher than that with dopant A. However,the increase of dopant B has resulted in a lower density of Ta bar. The increase of the dopant has resulted in tantalum wire having a higher recrystallization temperature and texture grain refinement degree, and the effect of the grain refinement with dopant B is more obvious than that with dopant A. Insufficient sintering and incomplete recrystallization at annealing are the main causes of burr and pit during the production of doped tantalum wire.

VB is doped into graphite with solid-phase method. Study is made of the effect of VB dosage, roasting temperature and duration on the electrochemical property of the composite material. The following optimum technological parameters were developed as follows through orthogonal experiment： VB dosage 9%, the roasting temperature 1 200 ℃, roasting duration 3 h. The test results prove that the optimized synthesis technology is good for improvement of electrochemical property of lithium ion battery cathode material.

The LiFePO4/C anode material for lithium-ion batteries was synthesized by solid-phase synthesis. The crystalline structure,grain morphology and electrochemical performance of the product were investiga-ted. The results show that the resultant LiFePO4/C has simple pure olive-type structure with uniform distribution of the gain sizes. The initial specific charge and discharge capacity of LiFePO4/C is the highestwith 115 mAh/g at the rate of 0.1C and the retained capacity is 97% after 20 cycles .

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