SHS membranes based on materials of mica-like structure

International Conference on Synthesis and Consolidation of Powder Materials

Uvarov, V.I.^1 ; Alymov, M.I.^1 ; Kachin, A.R.^1 ; Loryan, V.E.^1 ; Shustov, V.S.^1 ; Fedotov, A.S.^1 ; Tsodikov, M.V.^2

Merzhanov Institute of Structural Macrokinetics and Materials Science, RAS, Chernogolovka

142432, Russia^1

Topchiev Institute of Petrochemical Synthesis, RAS, Moscow

119991, Russia^2

关键词: A-ceramics;    Aluminum production;    Filter membrane;    High-content;    Mineral raw material;    Open pores;    Open porosity;    Quartz sand;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/558/1/012053/pdf
DOI  :  10.1088/1757-899X/558/1/012053

来源: IOP

【 摘 要 】

The possibility of synthesizing a functional porous material of a mica-like structure to manufacture filter membranes for purification of liquids and gases, in particular tap water, was investigated. Mixtures of available powders based on mineral raw materials - quartz sand (SiO2) and Karelian schungite with reducing agents and secondary cryolite, a product of processing of fluorine-containing wastes of aluminum production, were used for the synthesis. The synthesis was carried out in the furnace at T = 930°C in the atmosphere of air at P = 1 atm. A ceramic filter membrane 40 mm in diameter and ∼ 5 mm in height was synthesized. The size of the open pores in the synthesized sample, which is measured according to GOST 26849-86, is 1?3 μm. The bending strength is 5.5?6 MPa. The product has a porosity of ∼ 60% and an open porosity of up to 98%. The synthesized sample efficiently purifies the tap water from the high content of heavy metal ions and reduces the hardness of the water by 30%.