ChemInform Abstract: Synthesis and Properties of Nickel‐Containing Niobates.

Abstract

Synthesis and Properties of Nickel-Containing Niobates.-Phase equilibria in the systems NiO-Nb 2 O 5 (A) and SrCO 3 -NiO-Nb 2 O 5 (B) are studied by means of complex physico-chemical methods. The formation of Ni 4 Nb 2 O 9 in system (A) is found. This high-temperature modification of nickel niobate crystallizes in the rhombic system. Solid solutions (Sr 1−x Nix) 4 Nb 2 O 9 (0 ≤ x ≤ 0.25) and (Sr 1−x Nix) 6 Nb 2 O 11 (x = 0.17) are formed in the ternary system (B). -(PODKORYTOV, A. L.; PANTYUKHINA, M. I.; SHTIN, S. A.; ZHUKOVSKII, V. M.; Zh. Neorg. Khim. 44 (1999) 5, 855-858; Ural. gos. univ. im. Gor'kogo, Ekaterinburg 620083, Russia; RU)

Ga- and Ti-containing Ni4Nb2O9-based solid solutions for Ni-Selective electrodes

“…More over, we observed a slight increase in total conductiv ity over the entire temperature range studied for the gallium and titanium doped niobates relative to their aluminum doped analogs [6]. On the whole, the tem perature dependences of conductivity for the new phases obtained here are similar in shape to those for the undoped compound Ni 4 Nb 2 O 9 [6,9].…”

“…Linear portions of the temperature dependences of conductivity were least squares fitted to straight lines and the results were used to evaluate the activation Thus, the conduction mechanism in the gallium and titanium containing nickel niobates is similar to that in the undoped compound Ni 4 Nb 2 O 9 [9].…”