The effects on the leaching rate of zinc were analyzed, the optimum conditions determined of leaching of zinc-oxide ore were as follows: liquid-solid ratio 5:1, stirring ratio 200r/min, particle size -120+160 mesh, the time of leaching 4.0h. the concentration of sulfuric acid 25%. The rate of leaching zinc is above 92.0% under above leaching conditions.
A general balance of oxidized zinc (Zn2+) and reduced chromium (Cr3+) and their distribution between the solution and chromate film for different solution compositions, as well as the elemental composition throughout the film's depth, are determined.
Comparison of oxidized zinc HRP C with Compound I shows that Compound I contains a porphyrin π-cation radical.
ESR spectra of oxygen photosorbed on reduced and oxidized zinc oxide
During refueling, spent electrolyte containing oxidized zinc particles is drained and fresh electrolyte is added.
Al-doped zinc-oxide (ZnO:Al) films are obtained by magnetron sputtering.
Characteristics of thermally stimulated depolarization phenomena in zinc-oxide ceramics for varistors
The results of experimental investigations and an analysis of the temperature dependences of the thermally stimulated depolarization current are presented for zinc-oxide ceramics suitable for use in high-voltage varistors.
The aim of this study was to evaluate the antimicrobial properties of four commonly used endodontic sealers: two epoxy-resin-based sealers (AH26, AH plus), one zinc-oxide eugenol-based sealer (N2), and one calcium hydroxide-based sealer (Sealapex).
The solubility of calcium-hydroxide-based (Sealer 26), silicon-polydimethylsiloxane-based (RoekoSeal), and zinc-oxide-eugenol based (Endofill and Intrafill) sealers was assessed in eucalyptol, xylol, orange oil, and distilled water.