Lithium aluminate (α-/β-LiAlO2) particles were fabricated using three methods. The first method used organic glycerin and triethylene glycol which functioned as a catalyst for fabrication of α-LiAlO2 particles with Al(OH) 3 and LiOH·H2O as the starting materials. As a result of the heat-treatment of the starting materials, α-/β-LiAlO2 particles could be obtained. The amount of α-LiAlO2 particles in α-/β-LiAlO2 increased slightly as more organics were added. Additionally, when synthesised α-/β-LiAlO2 particles were heat-treated in a CO2 gas flow, β-LiAlO 2 was partially transformed to α-LiAlO2. In the second method, molten salts (Li2/Na2/ K2CO 3) were used as a catalyst to fabricate α-LiAlO2 as a major phase, however, this method requires a washing process which can produce unexpected impurities. In the third method, pure α-LiAlO2 was obtained by heat-treatment of cheap sources such as Li2CO3 and Al(OH) 3 at 600-800 °C. The mean particle size (604 nm-11.85 μm) and the specific surface area (3.22-11.4 m2 g-1) of a-LiAlO2 were suitable for reinforcing the matrix and tape casting. Lastly, this study examined the effect of CO2 for the synthesising of a-LiAlO2 particles.
All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology