Synthesis and characterization of Li4SiO4 nano-powders by a water-based sol–gel process

Fabrication of Li4SiO4 pebbles by wet method with modified powders synthesized via sol–gel process

“…In the TG curve, four major weight losses regions were observed at four different temperature ranges. The loss of mass of the sample from 267°C to 712°C could be mainly ascribed to the removal of bonded water, decompositions of the metal citrate in the precursor and the formation of new phases [21,40]. In DTG curves, significant peak at 283.4°C can be associated with the removal of bonded water, the carbonization of the gel and the formation of Li 2 CO 3 .…”

“…The Li 4 SiO 4 powders were synthesized by a sol-gel process [21,31]. LiOH (AR, 99.99%) and SiO 2 (Aerosil, 99.99%) were used as starting materials, while citric acid (C 6 H 8 O 7 ) was used as chelating agent.…”

“…Such ionic conductivity of ceramics is affected by the synthetic method [21]. Various synthesis strategies have been proposed in order to enhance the structural features of Li 4 SiO 4 powders, including solid state reaction, precipitation method, combustion method and sol-gel process [21][22][23][24][25][26][27][28][29][30]. Especially, the sol-gel process is not only favorable from the perspectives of low synthesizing temperature and small particle size, but also controllable morphology and microstructure.…”

“…Especially, the sol-gel process is not only favorable from the perspectives of low synthesizing temperature and small particle size, but also controllable morphology and microstructure. The powders obtained from the sol-gel method processes a much higher sinterability due to its smaller particle size and higher specific surface, which is beneficial to obtain dense Li 4-SiO 4 ceramics and important for tritium breeding materials [21,[31][32][33]. For preparing Li-ceramic pebbles, wet method has advantages of being an economical and easy way in mass production and scale-production [34,35].…”

High temperature capture of CO2 on lithium-based sorbents from rice husk ash

“…Li 4 SiO 4 can be synthesized using different methods: the common solid-state reaction [12], precipitation method [18], impregnation suspension method [19] and sol-gel method [8,20]. The common solid-state method usually involves a solid mixture of amorphous silica (SiO 2 ) and a lithium compound, such as Li 2 CO 3 , heated in air for a long time between 700 and 1000 • C to produce lithium silicate powders.…”