Zobrazeno 1 - 10
of 54
pro vyhledávání: '"Mario Vallino"'
Autor:
R. Spinicci, M. Salis, Silvia Maria Ronchetti, A. Delmastro, Mario Vallino, P. Brovetto, Daniele Mazza
Publikováno v:
Materials Science and Engineering: B. 79:140-145
La (1− e ) FeO (3−1.5 e ) perovskite catalysts ( e =0, 0.1, 0.2, 0.3) are synthetized by low-temperature thermal decomposition of La and Fe nitrates and further heating to 873 K in air. They are characterized by DTA, XRD, BET, SEM, Mossbauer spec
Publikováno v:
Journal of the European Ceramic Society. 18:607-611
The zone of the ternary system Al 2 O 3 La 2 O 3 Cr 2 O 3 delimited by LaCrO 3 , LaAlO 3 , Al 2 O 3 and Cr 2 O 3 has been examined. The existence of an extended field of mixed crystals with rhombohedral symmetry LaAl 1 − x Cr x O 3 (0 ≤ x
Publikováno v:
Journal of Solid State Chemistry. 117:55-63
The reduction isobar T vs δ (pO2 = 0.21 atm) of BaBiO3-δ between 750 and 1050°C shows a trend with three near linear sections in the ranges 750-850°C, 850-1000°C, and 1000-1045°C, respectively. The quenching in liquid N2 of first-section solids
Autor:
A. Mosolov, Roberto Gerbaldo, Laura Gozzelino, Giancarlo Genta, Cristiana Delprete, Silvia Maria Ronchetti, Fedele Abbattista, R. Albanese, Gianluca Ghigo, Enrica Mezzetti, Mario Vallino
Publikováno v:
Il Nuovo Cimento D. 16:2087-2094
This paper deals with a comparison of chemical, physical and mechanical characterisation of YBCO samples obtained with Temporary-Liquid-Densification Melt Growth (TLDMG). Ba2YCu3O7-x+50% excess BaY2CuO5 pellets were prepared from different Ba-Y-Cu-O
Autor:
Laura Gozzelino, Enrica Mezzetti, Roberto Cherubini, Roberto Gerbaldo, Bruno Minetti, Fedele Abbattista, Silvia Maria Ronchetti, Mario Vallino, Gianluca Ghigo, S. Colombo
Publikováno v:
Il Nuovo Cimento D. 16:1933-1939
Bulk slabs of sintered YBCO were irradiated with monoenergetic protons at different energies (3.5 and 6.5 MeV) and different fluences, ranging from 1.8·1016 to 8.6·1016 p/cm2. The effects on intergrain critical currents of protons crossing the samp
Autor:
Fedele Abbattista, Roberto Gerbaldo, Roberto Cherubini, Bruno Minetti, F. Periale, Enrica Mezzetti, Mario Vallino, D. Andreone
Publikováno v:
Journal of Superconductivity. 6:237-241
Previous and recent results on transport properties of sintered YBCO before and after 6.5 MeV proton implantation are reported. The samples under study come from two different batches, processed by nominally identical preparation methods. For the fir
Autor:
Vincenzo Lorenzelli, Mario Vallino, Daniele Mazza, A. Delmastro, Fedele Abbattista, Guido Busca, Giuseppe Gozzelino
Publikováno v:
ChemInform. 22
High-surface-area amorphous Al2O3–AlPO4 samples (P/Al ratio: 0–0.17) have been prepared by reductive decomposition of aluminium nitrate in the presence of phosphoric acid. The materials obtained are amorphous up to 1100–1200 K and present “ze
Autor:
Vincenzo Lorenzelli, Mario Vallino, Guido Busca, Giuseppe Gozzelino, A. Delmastro, Daniele Mazza
Publikováno v:
ChemInform. 23
Alumina-boria samples with B : (B + Al) 0–50 atom% have been prepared by an unconventional procedure consisting of the reductive decomposition of the mixture of nitrates in the presence of glycerol X-ray diffraction (XRD)-amorphous samples having s
Publikováno v:
ChemInform. 29
Publikováno v:
Il Nuovo Cimento D. 14:655-660
The thermoluminescence of α- and μ-cordierite samples has been recordedvs. temperature and wavelength. Arguments ascribing the observed emission to the easy ion exchanges characterizing cordierite lattices are advanced.