In ceramic industry, zircon sand is widely used in different applications because zirconia plays a role as common opacifying constituent. In particular, it is used as a basic component of glazes applied to ceramic tiles and sanitary ware as well as an opacifier in unglazed bulk porcelain stoneware. Natural zircon sands are the major source of zirconium minerals for industrial applications. They can be used in their typical grain size (100-300 um) in the 39 refractory industry while ceramic application requires milling to reduce size distribution down to 40-50 um (zircon flour) and/or to less than 5 um (micronized zircon). In this paper long, medium and short range studies were conducted on zirconium minerals originated from Australia, South Africa and United States of America using conventional and less conventional techniques i.e.(X-ray diffraction (XRD), Positron Annihilation Lifetime Spectroscopy (PALS), Perturbed Angular Correlations, (PAC)) in order to reveal the type and the extension of the regions that constitute the metamict state of zircon sands and the modifications therein produced as a consequence of the industrial milling process and the thermal treatment in the production line. Additionally, HPGe gamma-ray spectroscopy confirms the occurrence of significant levels of natural radioactivity responsible for metamictization in the investigated zircon samples. Results from XRD, PALS and PAC analysis confirm that the metamict state of zircon is a dispersion of submicron disordered domains in a crystalline matrix of zircon.

Structural Characterization of natural and processed zircons with X-rays and nuclear techniques / Damonte, Laura; Rivas, Patricia; Pasquevich, Alberto; Andreola, Fernanda; Bondioli, Federica; Ferrari, Anna Maria; Tositti, Laura; Cinelli, Giorgia. - In: ADVANCES IN CONDENSED MATTER PHYSICS. - ISSN 1687-8108. - STAMPA. - 2017:(2017), pp. 9707604.1-9707604.9. [10.1155/2017/9707604]

Structural Characterization of natural and processed zircons with X-rays and nuclear techniques

TOSITTI, LAURA;CINELLI, GIORGIA
2017

Abstract

In ceramic industry, zircon sand is widely used in different applications because zirconia plays a role as common opacifying constituent. In particular, it is used as a basic component of glazes applied to ceramic tiles and sanitary ware as well as an opacifier in unglazed bulk porcelain stoneware. Natural zircon sands are the major source of zirconium minerals for industrial applications. They can be used in their typical grain size (100-300 um) in the 39 refractory industry while ceramic application requires milling to reduce size distribution down to 40-50 um (zircon flour) and/or to less than 5 um (micronized zircon). In this paper long, medium and short range studies were conducted on zirconium minerals originated from Australia, South Africa and United States of America using conventional and less conventional techniques i.e.(X-ray diffraction (XRD), Positron Annihilation Lifetime Spectroscopy (PALS), Perturbed Angular Correlations, (PAC)) in order to reveal the type and the extension of the regions that constitute the metamict state of zircon sands and the modifications therein produced as a consequence of the industrial milling process and the thermal treatment in the production line. Additionally, HPGe gamma-ray spectroscopy confirms the occurrence of significant levels of natural radioactivity responsible for metamictization in the investigated zircon samples. Results from XRD, PALS and PAC analysis confirm that the metamict state of zircon is a dispersion of submicron disordered domains in a crystalline matrix of zircon.
2017
Structural Characterization of natural and processed zircons with X-rays and nuclear techniques / Damonte, Laura; Rivas, Patricia; Pasquevich, Alberto; Andreola, Fernanda; Bondioli, Federica; Ferrari, Anna Maria; Tositti, Laura; Cinelli, Giorgia. - In: ADVANCES IN CONDENSED MATTER PHYSICS. - ISSN 1687-8108. - STAMPA. - 2017:(2017), pp. 9707604.1-9707604.9. [10.1155/2017/9707604]
Damonte, Laura; Rivas, Patricia; Pasquevich, Alberto; Andreola, Fernanda; Bondioli, Federica; Ferrari, Anna Maria; Tositti, Laura; Cinelli, Giorgia
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/607440
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