New synthesis route for glasses and glass-ceramics in the Ga2S3Na2S binary system

Mechanochemical Synthesis and Study of the Local Structure of NaGaS2 Glass and Glass–Ceramics

“…T g and T x of NaGaS 2 -Zr-9h are determined based on DSC analysis (Figure b). They are about 293 and 403 °C (± 5 °C), respectively, in good agreement with the literature . SEM analysis on NaGaS 2 -Zr-9h reveals that the powder is composed of aggregates of submicron particles (Figure c).…”

“…It also offers the possibilities to synthesize materials without solvent or gas and to obtain materials that usually require high temperatures. In the case of glasses, mechanochemical milling can enlarge the amorphous domain compared to the one obtained by the conventional melt-quenching technique …”

“…Different crystalline compounds have been obtained after annealing the corresponding stoichiometric mechanical milled glass in the Na 2 S·P 2 S 5 binary (Na 2 P 2 S 6 , Na 3 PS 4 ). , In this work, we investigate if the same synthesis strategy could be applied for NaGaS 2 , as amorphous x [Na 2 S]·(100 – x ) [Ga 2 S 3 ] compounds were obtained through ball milling in our previous work with Na 2 S content ranging from x = 20 to 80 . We report new methods for synthesizing NaGaS 2 glass–ceramic either indirectly through the crystallization of amorphous NaGaS 2 obtained by mechanical milling or directly at room temperature by mechanochemistry synthesis, depending on the milling conditions.…”

Sodium-Ion Conducting Solid Electrolytes in the Na₂S–In₂S₃ System

“…Amorphous electrolytes have an open structure that allows carrier ions to move three-dimensionally, achieving high ionic conductivity by increasing the number of mobile carrier ions. 20,32 Thus, the x = 60-90 samples containing Na-rich amorphous phases showed higher conductivity. The conductivity varied with the amorphous ratio in the samples because phases other than the amorphous phase partially prevented ionic conduction.…”

“…The conductivities of major sulfide Na-ion conductors with central cations containing elements from groups 13, 14, and 15 are listed in Table 1. 8,[18][19][20][21][22][23][24][25][26][27] For elements of group 13, the synthesis of In-containing compounds, such as Na 5 InS 4 and NaInS 2 , has been previously reported; 28,29 however, their electrical conductivities have not been determined yet. Because sulfide Na-ion conductors with elements of group 13 (B, Al, and Ga) as central cations are utilized as ionic conductors, similar compounds consisting of central In cations from the same group can also be potentially used for the same purpose.…”