Papers by Author: Qi De Wu

Abstract: Li₂O-Al₂O₃(La₂O₃)-TiO₂-P₂O₅ glass-ceramics were fabricated through heat-treatment of the original glass. The differential scanning calorimetry (DSC), X-ray diffraction (XRD), scanning electron microscopy (SEM) and electrochemical workstation were employed to study the structural, morphology and electrical properties of the samples heat-treated at different temperatures. The results showed that: the glass-ceramics consist of the dominating LiTi₂(PO₄)₃ phases, trifle AlPO₄, TiO₂ and unknown phases. With the heat-treatment temperature increasing from 700 °C to 1100 °C, the structure of glass-ceramic become denser and grain grew, lithium ion conductivity increased quickly and subsequent cut down gradually. While the specimen was obtained by crystallization at 900 °C for 12 h, the total conductivity of glass-ceramic material come up to the maximum (5.85 ×10^-4 S•cm^-1) at 25 °C. This inorganic solid electrolyte has a potential application in lithium batteries or other devices.

Abstract: In hard plastic extruding course, the frictional resistance among particles and between the particles and mould make the extruding pressure 4 to 20 times larger than soft-plastic extruding. This paper study the plasticizer mechanism of water-soluble plasticizer in hard plastic extruding course, and emphasize that in this course the plasticizer liquid film not only have good combination with ceramic particle, but also has high yield strength so that the plasticizer liquid film is difficult to slide and be pulled thin. The compound usage of different plasticizers which can improve the effect of plasticizer enhances the quality of the final molding body.

Abstract: The 1.2µm and 100µm silicon carbide were prepared by the process of reshaping and classification. The effect of particle morphology and particle size distribution of silicon carbide on tap density, green body density and apparent viscosity of slurry were analysized. The result showed that the particle size distribution closed to normal distribution and the particle morphology closed to spherical were the main cause that leads to the lower apparent viscosity and the higher density of the green body.