Anorthite-based highly porous membranes were successfully produced using calcined oyster shell to enhance the pore network. The calcined oyster shells produce CaO responsible for the crystallisation of gehlenite and anorthite at relatively low temperature. While the crystallisation produced nano and meso size of intergranular pores, vitrification of feldspar is responsible for development of the capillary porosities. The increasing sintering temperature from 1200 °C to 1300 °C implies the increase in average pores radius from 1.2 μm to 14.3 μm due to the formation of spherical pores from vitrification. The combination of different class of porosities in the matrices results in the interconnection with improvement of the permeability of the porous network. Porosity, permeability and chemical stability were improved with 20 wt.% of calcined oyster shell addition allowing the possible development of high strength porous network which is promising for the membranes support and other applications including liquid separation as well as liquid filtration where high pressure is used.

Thermal behaviour and phases evolution during the sintering of porous inorganic membranes / Deutou, J. N. G.; Kamga, V. E. L. S.; Kaze, R. C.; Kamseu, E.; Sglavo, V. M.. - In: JOURNAL OF THE EUROPEAN CERAMIC SOCIETY. - ISSN 0955-2219. - 40:5(2020), pp. 2151-2162. [10.1016/j.jeurceramsoc.2020.01.035]

Thermal behaviour and phases evolution during the sintering of porous inorganic membranes

Sglavo, V. M.
2020

Abstract

Anorthite-based highly porous membranes were successfully produced using calcined oyster shell to enhance the pore network. The calcined oyster shells produce CaO responsible for the crystallisation of gehlenite and anorthite at relatively low temperature. While the crystallisation produced nano and meso size of intergranular pores, vitrification of feldspar is responsible for development of the capillary porosities. The increasing sintering temperature from 1200 °C to 1300 °C implies the increase in average pores radius from 1.2 μm to 14.3 μm due to the formation of spherical pores from vitrification. The combination of different class of porosities in the matrices results in the interconnection with improvement of the permeability of the porous network. Porosity, permeability and chemical stability were improved with 20 wt.% of calcined oyster shell addition allowing the possible development of high strength porous network which is promising for the membranes support and other applications including liquid separation as well as liquid filtration where high pressure is used.
5
Deutou, J. N. G.; Kamga, V. E. L. S.; Kaze, R. C.; Kamseu, E.; Sglavo, V. M.
Thermal behaviour and phases evolution during the sintering of porous inorganic membranes / Deutou, J. N. G.; Kamga, V. E. L. S.; Kaze, R. C.; Kamseu, E.; Sglavo, V. M.. - In: JOURNAL OF THE EUROPEAN CERAMIC SOCIETY. - ISSN 0955-2219. - 40:5(2020), pp. 2151-2162. [10.1016/j.jeurceramsoc.2020.01.035]
File in questo prodotto:
File Dimensione Formato  
1-s2.0-S0955221920300455-main.pdf

Solo gestori archivio

Descrizione: articolo completo
Tipologia: Versione editoriale (Publisher’s layout)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 4.82 MB
Formato Adobe PDF
4.82 MB Adobe PDF   Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11572/285172
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 7
  • ???jsp.display-item.citation.isi??? 5
social impact