Electrical conductivity of hydrothermally synthesized sodium lithium magnesium silicate. (January 2018) - Hai, Chunxi
Graphical abstract: Highlights: Na-hectorites nanoplaters with high aspect ratio were synthesized. Comparing with other ions, Na + is much more facilitated to be intercalated into the interlayer of hectorites. The relationship between physic-chemical properties and electrical conductivity of Na-hectorites was systematically investigated. Abstract: This study is focused on the investigation of the electrical conductivity of sodium lithium magnesium silicate (Na hectorite) dispersion, which was hydrothermally synthesized from the brine of the Qarhan Salt Lake. Depending on the duration of the utilized hydrothermal treatment procedure, porous hectorite samples with tunable aspect ratios ranging from 70 to 500 were produced from the delaminated specimens stacked along the c -axis. More, benefiting from the appearance and enlarged size of these stacked layers, the as-prepared Na hectorites obtained at 180 °C for longer than 96 h own the average conductivities in excess of ×10 −4 S/cm when the concentrations are higher than 1.25 mg·mL −1, which is largely influenced by their size, crystallinity and aspect ratio.