Autor(es): Gonçalves, Jaderson ; da Silva, Gustavo ; Lima, Liandra ; Morgado, Daniella [UNESP] ; Nalin, Marcelo [UNESP] ; Armas, Luis E. G. ; Valsecchi, Chiara ; Menezes, Jacson W.
Data: 2022
Identificador Persistente: http://hdl.handle.net/11449/222707
Origem: Oasisbr
Assunto(s): Antimony oxide; Manganese oxide impurities; Sustainable glass; Transparent rice husk glass
Made available in DSpace on 2022-04-28T19:46:21Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-12-01
Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Glass is a familiar material that requires abundant mineral sources, with devastating consequences for the environment. Rice husk ash (RHA) presents a very high silica content (>95%) and it can be a very promising alternative source for silica in silica-based glass. However, impurities like manganese and iron, which depend on the rice harvest, might limit RHA use, particularly in the production of optical transparent glasses. In this work, we discussed how Mn and Fe can affect the coloring of the produced glass, and how the effect of these impurities can be removed. First, the RHA was treated with acid solutions, leading to the production of a soda-lime glass with similar transparency to commercial glass (>70%). Secondly, another simpler approach was studied: a small amount of antimony oxide was added in the composition of the glass, obtaining a transparent glass (>80%, same thickness) with RHA.
Federal University of Pampa, Av. Tiarajú 810
Institute of Chemistry São Paulo State University Unesp, Rua Prof. Francisco Degni, 55
Institute of Chemistry São Paulo State University Unesp, Rua Prof. Francisco Degni, 55
Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul: 19/2551-0001245-4
FAPESP: 2013/07793-6
