期刊
CERAMICS INTERNATIONAL
卷 47, 期 10, 页码 13859-13864出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2021.01.252
关键词
Niobium oxide; Mine tailings; Electron microscopy; Raman spectroscopy; Optical properties
资金
- Spanish Ministry of Science, Innovation and Universities [RTC-2017-6629-5, MINECO/FEDER-MAT2015-65274-R]
- European Union [776851]
- Comunidad de Madrid (Ayudas del Programa de Atraccion de Talento) [2017-T2/IND-5465]
This study demonstrates the potential of using niobium oxide recovered from tailings in Spain as a starting material for growing microstructures. Various characterization techniques were used to determine the properties of the resulting microrods, showing the possibility of transforming waste into high-value materials.
In this work, the possibility of using niobium oxide recovered from tailings from the Penouta Sn?Nb?Ta deposit (located at the North of Spain) as starting material for growing microstructures is demonstrated. The properties of the starting material have been studied to understand its crystal structure, quality and purity. Recovered niobium oxide powders are mainly of TT-Nb2O5. These powders have been used to grow Nb22O54 microrods by an evaporation method in an argon atmosphere. Different characterization techniques (X-Ray diffraction, scanning electron microscopy, micro-Raman spectroscopy, luminescence) have been used to determine the properties of Nb22O54 microrods, mainly focusing on the crystal quality and refractive index. The present study opens the way to the transformation of waste (mine tailings) into a material of high technological value as niobium oxide, and its reintroduction into the value chain for a wide range of applications, from coatings to batteries and supercapacitors.
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