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pro vyhledávání: '"623"'
Publikováno v:
Journal of Solid State Chemistry. 179:590-596
The synthesis of pure and Cr-doped nanosized LiMn 2 O 4 particles has been carried out by solid-state process on high-energy ground mixtures. In situ X-ray analysis demonstrates the spinel forms as single phase at 623 K passing through the Mn 3 O 4 p
Publikováno v:
Journal of Solid State Chemistry. 122:324-332
Hydroxycarbonate precursors with different Cu/Zn/Co/Al/Cr atomic ratios were prepared by coprecipitation of the metal nitrates with a stoichiometric amount of NaHCO3under controlled conditions of temperature, stirring, and pH. Cu–Zn–Co–Al–Cr
Publikováno v:
Journal of Solid State Chemistry. 89:167-173
Samples of CuCo mixed oxide with Cu Co = 0.25 to 1.0 (atomic ratio) were prepared by coprecipitation with Na2CO3 and were characterized with TG, DSC, XRD, and XPS. Exothermic DSC peaks were observed at 588 and 808 K for Cu Co = 0.25 , and at 588,
Publikováno v:
Journal of Solid State Chemistry. 142:382-392
Several Co/Mg/Al layered double hydroxides (LDH) with (Mg2++Co2+)/Al3+=2 and 3 and Mg2+/Co2+ranging from 0 to 4 have been synthesized by coprecipitation at pH=9 and NO−3as main compensating anions. All samples present well-crystallized layered stru
Publikováno v:
Journal of Solid State Chemistry. 129:271-276
WAXS study of highly divided oxides obtained by low temperature decomposition of mixed oxalates NiMn 2 (C 2 O 4 ) 3 · n H 2 O in air at low temperatures (573 and 623 K) shows that oxalate decomposition leads probably directly to the spinel structure
Publikováno v:
Journal of Solid State Chemistry. 125:108-111
In a previous communication, it was shown that the precipitate obtained from mixed nitrate solution of Cu, Zn, and Al is more or less monophasic in which Al{sup 3+} ions have been incorporated in the aurichalcite (Cu, Zn){sub 5}(CO{sub 3}){sub 2}(OH)