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Pregled bibliografske jedinice broj: 645098

Positron lifetimes in pores of some low-silica zeolites: influence of water content, crystal size and structural type


Bosnar, Sanja; Bosnar, Damir; Ren, Nan; Rajić, Nevenka; Gržeta, Biserka; Subotić, Boris
Positron lifetimes in pores of some low-silica zeolites: influence of water content, crystal size and structural type // Journal of porous materials, 20 (2013), 5; 1329-1336 doi:10.1007/s10934-013-9718-y (međunarodna recenzija, članak, znanstveni)


Naslov
Positron lifetimes in pores of some low-silica zeolites: influence of water content, crystal size and structural type

Autori
Bosnar, Sanja ; Bosnar, Damir ; Ren, Nan ; Rajić, Nevenka ; Gržeta, Biserka ; Subotić, Boris

Izvornik
Journal of porous materials (1380-2224) 20 (2013), 5; 1329-1336

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Microporous materials; positron annihilation spectroscopy; thermogravimetric analysis (TGA); microstructure

Sažetak
Positron annihilation lifetime spectroscopy has been used for observation of the free voids in low silica zeolites, of LTA and FAU structure and different crystal size, before and after their heating at different temperatures below 200 °C. Sizes of crystals of the zeolite samples, as well as their structures and water contents, were characterized by X-ray diffraction, scanning electron microscopy, thermogravimetry, and particle size distribution measurements. The number of positron lifetime components as well as their values and intensities, after water removal from the zeolite structure, vary. However, changes are not uniform in all investigated zeolites. The differences are compared and discussed in the dependence of different structure types and crystal sizes of investigated zeolites.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija



POVEZANOST RADA


Projekt / tema
098-0982904-2953 - Studij utjecaja svojstava alumosilikatnih prekursora na njihove transformacije (Josip Bronić, )
119-1191005-1021 - QCD i jezgre; primjena nuklearnih metoda:materijali,medicina,okoliš (Damir Bosnar, )

Ustanove
Institut "Ruđer Bošković", Zagreb,
Prirodoslovno-matematički fakultet, Zagreb

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


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