Problem of the lithium peroxide thermal stability

2nd International Symposium on Fundamental Aspects of Rare-earth Elements Mining and Separation and Modern Materials Engineering

材料科学;物理学

Nefedov, R.A.^1 ; Ferapontov, Yu A.^1 ; Kozlova, N.P.^2

Tambov State Technical University, Sovetskaya Str., Tambov

106, Russia^1

JSC Corporation Roskhimzashchita, Morshanskoe Highway, Tambov

19, Russia^2

关键词: Atmospheric air;    Differential thermal analyses (DTA);    Lithium carbonates;    Lithium oxides;    Lithium peroxides;    Qualitative analysis;    Temperature range;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/112/1/012027/pdf
DOI  :  10.1088/1757-899X/112/1/012027

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The behavior of lithium peroxide and lithium peroxide monohydrate samples under heating in atmospheric air was studied by the method of thermogravimetric analysis (TGA) and differential thermal analysis (DTA). It was found that in the temperature range of 32°C to 82°C the interaction of lithium peroxides and steam with the formation of lithium peroxide monohydrate occurs, which was confirmed chemically and by X-ray Single-qualitative analysis. It was experimentally found that lithium peroxide starts to decompose into the lithium oxide and oxygen in the temperature range of 340 348°C. It was established that the resulting thermal decomposition of lithium oxide, lithium peroxide at the temperature of 422°C melts with lithium carbonate eutecticly. The manifestation of polymorphism was not marked(seen or noticed) under the heating of studied samples of lithium peroxide and lithium peroxide monohydrate in the temperature range of 25°C 34°C.