Rheological studies of aqueous stabilised nano-zirconia particle suspensions
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Materials research (São Carlos. Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392012000100004 |
Resumo: | In the present investigation aqueous suspensions of nano- and colloidal range particles are stabilised by changing the ambient pH. Rheology is used to establish the stability of the suspensions and it is found that the rheology of the suspensions is strongly dependent on the pH values. The viscosity is highest close to the iso-electric point of the powders. At the iso-electric point the net surface charge on the powder particles is zero and is the cause of the high viscosity. Away from the iso-electric point, the particles are charged, giving rise to a double layer phenomenon and causing the reduction in viscosity. It is also found that increasing the solid contents of the suspensions reduces the pH region of low viscosity. |
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Rheological studies of aqueous stabilised nano-zirconia particle suspensionszirconiarheologyelectrophoretic mobilitysuspensionIn the present investigation aqueous suspensions of nano- and colloidal range particles are stabilised by changing the ambient pH. Rheology is used to establish the stability of the suspensions and it is found that the rheology of the suspensions is strongly dependent on the pH values. The viscosity is highest close to the iso-electric point of the powders. At the iso-electric point the net surface charge on the powder particles is zero and is the cause of the high viscosity. Away from the iso-electric point, the particles are charged, giving rise to a double layer phenomenon and causing the reduction in viscosity. It is also found that increasing the solid contents of the suspensions reduces the pH region of low viscosity.ABM, ABC, ABPol2012-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392012000100004Materials Research v.15 n.1 2012reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392011005000097info:eu-repo/semantics/openAccessKhan,Asad UllahHaq,Anwar UlMahmood,NasirAli,Zulfiqareng2012-02-23T00:00:00Zoai:scielo:S1516-14392012000100004Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2012-02-23T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.none.fl_str_mv |
Rheological studies of aqueous stabilised nano-zirconia particle suspensions |
title |
Rheological studies of aqueous stabilised nano-zirconia particle suspensions |
spellingShingle |
Rheological studies of aqueous stabilised nano-zirconia particle suspensions Khan,Asad Ullah zirconia rheology electrophoretic mobility suspension |
title_short |
Rheological studies of aqueous stabilised nano-zirconia particle suspensions |
title_full |
Rheological studies of aqueous stabilised nano-zirconia particle suspensions |
title_fullStr |
Rheological studies of aqueous stabilised nano-zirconia particle suspensions |
title_full_unstemmed |
Rheological studies of aqueous stabilised nano-zirconia particle suspensions |
title_sort |
Rheological studies of aqueous stabilised nano-zirconia particle suspensions |
author |
Khan,Asad Ullah |
author_facet |
Khan,Asad Ullah Haq,Anwar Ul Mahmood,Nasir Ali,Zulfiqar |
author_role |
author |
author2 |
Haq,Anwar Ul Mahmood,Nasir Ali,Zulfiqar |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Khan,Asad Ullah Haq,Anwar Ul Mahmood,Nasir Ali,Zulfiqar |
dc.subject.por.fl_str_mv |
zirconia rheology electrophoretic mobility suspension |
topic |
zirconia rheology electrophoretic mobility suspension |
description |
In the present investigation aqueous suspensions of nano- and colloidal range particles are stabilised by changing the ambient pH. Rheology is used to establish the stability of the suspensions and it is found that the rheology of the suspensions is strongly dependent on the pH values. The viscosity is highest close to the iso-electric point of the powders. At the iso-electric point the net surface charge on the powder particles is zero and is the cause of the high viscosity. Away from the iso-electric point, the particles are charged, giving rise to a double layer phenomenon and causing the reduction in viscosity. It is also found that increasing the solid contents of the suspensions reduces the pH region of low viscosity. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-02-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392012000100004 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392012000100004 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1516-14392011005000097 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
ABM, ABC, ABPol |
publisher.none.fl_str_mv |
ABM, ABC, ABPol |
dc.source.none.fl_str_mv |
Materials Research v.15 n.1 2012 reponame:Materials research (São Carlos. Online) instname:Universidade Federal de São Carlos (UFSCAR) instacron:ABM ABC ABPOL |
instname_str |
Universidade Federal de São Carlos (UFSCAR) |
instacron_str |
ABM ABC ABPOL |
institution |
ABM ABC ABPOL |
reponame_str |
Materials research (São Carlos. Online) |
collection |
Materials research (São Carlos. Online) |
repository.name.fl_str_mv |
Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR) |
repository.mail.fl_str_mv |
dedz@power.ufscar.br |
_version_ |
1754212660508884992 |