New cadmium and rare-earth metal molybdato–tungstates with scheelite-type structure

Phase equilibria in the solid state and colour properties of the CuO–In2O3 system

“…All samples were synthesised from mixtures of oxides containing In 2 O 3 (p.a., Aldrich, Niemcy) and CuO (p.a., Fluka, Germany) by the conventional method of stage calcinations [16][17][18][19]. Mixtures of oxides of compositions specified in Table 1, were homogenised by grinding, formed into tablets and heated in air at stages from 700 to 900°C.…”

A new ceramic continuous solid solution in the CrSnSbO6–FeSnSbO6 system and some of its properties

“…in [28][29][30][31][32]. Stoichiometric amounts of Fe 2 O 3 , Cr 2 O 3 , SnO 2 and α-Sb 2 O 4 as well as CrSnSbO 6 and FeSnSbO 6 were thoroughly mixed in a mechanical grinder (Pulverisette 2, Fritsch, Germany) and the obtained powder was heated in air at temperatures from the range 600-1200 1C.…”

Preparation, thermal stability and magnetic properties of new AgY1−xGdx(WO4)2 ceramic materials

“…For this purpose, an AgNO 3 /WO 3 mixture was heated in air at 623 K for 12 h, and next at 773 K for 2 Â 12 h in order to complete the reaction according to the following equation: The final product was characterized by a powder XRD method as orthorhombic silver tungstate, Ag 2 WO 4 , with Pn2n symmetry [46]. Polycrystalline samples of rare earth metal tungstates, RE 2 (WO 4 ) 3 (RE ¼ Y, Gd) were obtained by annealing of RE 2 O 3 with WO 3 mixed in the 1:3 molar ratio and in the thermal conditions that were set out earlier [47][48][49]. The lowtemperature polymorphs of AgY 1 À x Gd x (WO 4 ) 2 solid solutions (where x=0, 0.005, 0.01, 0.025, 0.05, 0.1, 0.2 and 1) were successfully prepared by high-temperature solid-state reaction using Ag 2 WO 4 , Y 2 (WO 4 ) 3 and Gd 2 (WO 4 ) 3 .…”