Silver-loaded maifanite prepared at different particle sizes (60 mesh~200 mesh) and light calcining temperatures (100°C~800°C) of maifanite, different AgNO3solution concentrations (0.025 mol•L-1~0.300 mol•L-1) and pH values (2~7) were researched, simultaneously antibacterial ability of silver-loaded maifanite was investigated. Results indicate that the appropriate conditions of preparing silver-loaded maifanite are that particle size is 200 mesh, light calcining temperature is 100°C, AgNO3concentration is 0.1 mol•L-1at pH=7, and then the silver-loading amount of maifanite gained at this conditions is 1.27wt%; antimicrobial ability of silver-loaded maifanite decreases with increase of light calcining temperature.

Mullite/corundum composites synthetized by sintering with bauxite as raw material was researched. The sintering temperature, main crystal phase, microstructure and fracture mode of the composites synthetized by sintering are different with change of ratio of Al2O3 and SiO2 and content of Al2O3: (1) If the ratio of Al2O3 and SiO2 and content of Al2O3 is low, sintering temperature of the composites is high, the main crystal phase is mullite, microstructure shows interlocking network structure formed by columnar mullite, the fracture mode of composites shows that mullite appears in the pulled out state; (2) If the ratio of Al2O3 and SiO2 content of Al2O3 is high, sintering temperature of the composites is low, the main crystal phase is corundum, microstructure shows the skeleton structure formed by granulous corundumthe, the fracture mode of composites shows intergranular fracture formed by corundum, occasionally transcrystalline fracture. The major reason of different sintering temperature of the composites is concerned with mullitization degree and content of glass phase.

Controlling crack of hyperbolic arch dam with a height of 305 m in Jinping hydropower station is an important problem. To improve the anti-cracking ability and reduce cracking risk of hydraulic concrete, polyvinyl alcohol (PVA) fiber and polypropylene thick fiber were used in hydraulic concrete using four gradations of aggregates. Indoor and productive tests were carried through to comparatively analyze workability, physical and mechanical properties and anti-cracking ability. Workability of fiber reinforced concrete was improved to be in favor of construction. When two kinds of fiber were used in concrete, the anti-cracking ability was greatly enhanced with lower elastic modulus-to-strength ratio and lager ultimate tensile strain. Concrete using PVA fiber had better anti-cracking ability than that of concrete using polypropylene thick fiber. PVA fiber reinforced concrete was applied in Jinping hydropower station. It is proved that PVA fiber reinforced concrete has good properties reaching design requirements of workability, compressive strength, ultimate tensile strain, frost resistance, permeability resistance.

The sintering behavior, physical properties and heat processing changes of bauxite-based homogenized grogs prepared by homogenization process and high temperature sintering using bauxite as starting material were investigated. Results show that the bauxite-based mullite can be synthesized by the method, sintering temperature with and without MgO/CeO2sintering aids are 1600°C and 1700°C separately, the mullite with apparent porosity of＜1.0% and 2.5%, bulk density of ≥2.87g•cm-3and 2.75g•cm-3, Refracteriness-Under-Load(RUL) 1600°C and 1620С; changes in the heat processing is divided into three stages: dehydration stage(400°С~900°С ), primary mullitization stage(1000°С ~1200°С) and secondary mullitization stage(>1200°С).

The zirconium phosphate α-Zr(HPO4)2·H2O (α-ZrP) with layered structure has been synthesized by refluxing method. Power X-ray diffraction (XRD), vibrational spectroscopy (FT-IR, FT-Raman), thermal analysis (TG-DSC), transition electron spectroscopy (TEM), scanning electron microscopy (SEM) and energy dispersive X-ray spectrometer (EDS) was respectively used for structure characterization of the compound α-ZrP. The result of intercalation reactions with tetramethylammonium bromide and cetyltrimethylammonium bromide showed interlayer distances increase of ~ 0.46 nm and ~ 1.68 nm, respectively. The BET surface area of α-ZrP is 12.29 m2·g-1. The cyclic voltammetry behaviors of the compound on Au electrode showed a typical reversible process. Moreover, the strong fluorescent property of the α-ZrP was measured. The maximum emission peaks occurred at ca. 390 nm upon excitation at ca. 288 nm.