ABSTRACT
In this paper, alumina ceramics in the aerospace, aviation, engine wear-resistant parts, electronic ceramics, knives, etc. are widely used. With the alumina ceramic expanding market demand, alumina ceramic sintering technology innovation has been going on. In recent years, the development of alumina ceramics mainly concentrated in the lower sintering temperature of alumina ceramic to reduce energy consumption, reduce the firing cycle, to reduce wear and tear, such as furnace and kiln areas.
Alumina ceramics to modern requirements, that is, to reduce costs in the conditions, use of effective methods to make alumina ceramic at a lower temperature sintering densification. In this paper, the design of their predecessors based on CuO-TiO2 composite auxiliary aids and glass for the additives, the use of sol-gel method at low temperature synthesis of nano-alumina powder, and the use of high-temperature DTA-404PC DTA and WRT -3P micro-thermal balance of the dry gel analyzer for differential thermal (DTA) -weight loss (TG) analysis, test the atmosphere for air, heating rate of 10 ℃ • min-1. The use of ARL XTRA X-ray diffraction carried out on the powder phase analysis,Cu Kα radiation (λ = 0.15406 nm), tube voltage 40 kV, tube flow 80 mA, measurement range 2θ = 10-80 °. Add the powder ultrasonic dispersion in ethanol 10min, and then placed in the use of copper-line transmission electron microscopy observation. The results showed that, through the preparation of the above-mentioned additive powders of nano-alumina, can effectively reduce the sintering temperature.
Keywords:Sol-gel; Al2O3; Nanopowder; Synthesis at Low Temperature