Properties of Powders Synthesized from Aqueous Solutions of Sodium Silicate and Iron Sulfate

IF 0.6 4区材料科学 Q4 MATERIALS SCIENCE, CERAMICS

Glass and Ceramics Pub Date : 2024-10-02 DOI:10.1007/s10717-024-00684-z

T. V. Safronova, M. R. Akhmedov, K. S. Zakharov, E. A. Motorin, T. B. Shatalova, Ya. Yu. Filippov, A. M. Murashko, T. V. Filippova, O. V. Boytsova, I. V. Kolesnik, O. T. Gavlina, P. E. Kazin

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Abstract

The phase composition of the powder synthesized from aqueous solutions of sodium silicate Na₂SiO₃ and iron sulfate FeSO₄ at the molar ratio Fe/Si = 2, as determined by x-ray diffraction (XRD) data, included hydrated sodium iron sulfate Na₂Fe(SO₄)₂ · 4H₂O and an x-ray amorphous product based on hydrated iron and silicon oxides. The phase composition of the powder obtained by fourfold washing of the synthesized powder in distilled water was represented by an x-ray amorphous product.

Following firing in the air at temperatures ranging from 400 to 1200°C, hematite (Fe₂O₃) and cristobalite (SiO₂) were identified in powder samples and the corresponding ceramics. Following firing at 900°C in graphite powder bedding, the phase composition of ceramic samples included magnetite (Fe₃O₄), laihunite (Fe_4.74(SiO₄)₃), and fayalite (Fe₂SiO₄). The powder prepared from the product isolated from the mother liquor included hydrated sodium iron sulfate, Na₂Fe(SO₄)₂ · 4H₂O, and sodium iron sulfate hydroxide hydrate (metasideronatrite), Na₄Fe₂(SO₄)₄(OH)₂ · 3H₂O. Following heat treatment at 400°C, sodium iron sulfate (Na₃Fe(SO₄)₃) was identified as the predominant phase in the powder. Powders resulting from the interaction of aqueous solutions of sodium silicate and iron sulfate can be used in the manufacture of high-temperature dyes and materials with magnetic properties, the creation of analogs of lunar or Martian regolith, as well as the development of functional (cathode) materials for Na-ion batteries.

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硅酸钠和硫酸铁水溶液合成粉末的特性

由硅酸钠 Na2SiO3 和硫酸铁 FeSO4 的水溶液（摩尔比 Fe/Si = 2）合成的粉末的相组成是由 X 射线衍射（XRD）数据确定的，包括水合硫酸铁钠 Na2Fe(SO4)2 - 4H2O 和基于水合铁和硅氧化物的 X 射线无定形产物。将合成粉末在蒸馏水中洗涤四次后得到的粉末的相组成是一种 x 射线无定形产物。在石墨粉垫层中以 900°C 煅烧后，陶瓷样品中的相组成包括磁铁矿（Fe3O4）、来鸿铁矿（Fe4.74(SiO4)3）和辉绿岩（Fe2SiO4）。从母液中分离出的产物制备的粉末包括水合硫酸铁钠（Na2Fe(SO4)2 - 4H2O）和水合硫酸铁氢氧化钠（偏皂石）（Na4Fe2(SO4)4(OH)2 - 3H2O）。在 400°C 热处理后，硫酸钠铁（Na3Fe(SO4)3）被确定为粉末中的主要相。硅酸钠和硫酸铁水溶液相互作用产生的粉末可用于制造高温染料和具有磁性的材料，制作月球或火星岩石的类似物，以及开发钠离子电池的功能（阴极）材料。

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来源期刊

Glass and Ceramics 工程技术-材料科学：硅酸盐

CiteScore

1.00

自引率

16.70%

发文量

审稿时长

6-12 weeks

期刊介绍： Glass and Ceramics reports on advances in basic and applied research and plant production techniques in glass and ceramics. The journal''s broad coverage includes developments in the areas of silicate chemistry, mineralogy and metallurgy, crystal chemistry, solid state reactions, raw materials, phase equilibria, reaction kinetics, physicochemical analysis, physics of dielectrics, and refractories, among others.