Open AccessNew Process of Solidification under Low Temperature of Cation Conductive NaSn2(PO4)3 Synthesized Hydrothermally
Author(s) -
Rie Shimanouchi,
R. Okubo,
Hidetaka Sato
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/701/1/012078
Subject(s) - calcination , materials science , sintering , aqueous solution , hydrothermal circulation , hydrothermal synthesis , nuclear chemistry , chemical engineering , mineralogy , metallurgy , chemistry , catalysis , organic chemistry , engineering
NaSn 2 (PO 4 ) 3 hard bulk materials were successfully obtained by low-temperature calcination (~600 °C) from hydrothermally synthesized sols without a powder-press or sintering at high temperature. A hydrothermal reaction was performed at 250 °C for 5 h using an aqueous solution of NaOH, an aqueous solution of SnCl4, and H 3 PO 4 as starting materials. The ratio of the starting materials was changed, and the range in which NaSn 2 (PO 4 ) 3 was formed was investigated. As a result, the sample hydrothermally synthesized under the synthesis conditions of Na: Sn: P = 2.75: 0.50: 1.75 was produced as a white sol in a Teflon container. In order to remove Cl from this sol, an immersion treatment with deionized water was performed. After immersion treatment for 3 h, and calcination at 600-900 °C, it was possible to obtain the target substance NaSn 2 (PO 4 ) 3 as a hard bulk material.