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Gamma-radiolytic preparation of multi-component oxides

L. Prochazkova ; J. Barta ; V. Cuba ; Christian Ekberg (Institutionen för kemi och kemiteknik, Kärnkemi) ; Sabrina Tietze (Institutionen för kemi och kemiteknik) ; I. Jakubec
Radiation Physics and Chemistry (0969-806X). Vol. 124 (2016), p. 68-74.
[Artikel, refereegranskad vetenskaplig]

The preparation of solid precursors to Zn1-XCdXO and (Lu,Y)(3)Al5O12:Ce induced by Co-60 gamma-ray irradiation of aqueous solutions containing soluble metal salts and ammonium formate is presented: Due to the irradiation, crystalline zinc carbonate hydroxide Zn-4(CO3)(OH)(6). H2O or amorphous carbonates of Lu, Y and Al were formed in the solutions. After calcination at 500 degrees C, the agglomerated phase-pure Zn1-XCdXO with crystallite size about 50 nm was obtained if the Cd concentration in solutions remained below 16 M% (with respect to Zn) with x being up to 0.035. The solid precursors to garnets contained the intended concentration of all elements, according to X-ray fluorescence analysis. After calcination at 1200 degrees C in mild vacuum, the respective phase-pure garnets with crystallite size 100 nm or their solid solution were produced when the Ce dopation was kept below 2 M% (with respect to rare-earth metals). The Ce solubility in the garnet lattice was estimated as 1-2 M% at the calcination conditions used.

Nyckelord: Radiation synthesis, Inorganic oxide, Zinc oxide, Synthetic garnet, X-ray diffraction



Denna post skapades 2016-06-07.
CPL Pubid: 237409

 

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Institutioner (Chalmers)

Institutionen för kemi och kemiteknik, Kärnkemi
Institutionen för kemi och kemiteknik

Ämnesområden

Kemiteknik

Chalmers infrastruktur