Structure and Physical Properties of Ceramic Materials Based on ZrO-ScO for SOFC Electrolytic Membranes Obtained from Powders of Melted Solid Solutions with a Similar Composition.

This paper presents the results of studying the phase composition, luminescent characteristics, and ionic conductivity of ceramic scandium-stabilized solid solutions of zirconium dioxide containing 9 and 10 mol% ScO. Ceramic samples were prepared by sintering powders obtained by grinding melted solid solutions of the same composition. A comparative analysis of the obtained data with similar characteristics of single crystals has been carried out.

Long-Term Conductivity Stability of Electrolytic Membranes of Scandia Stabilized Zirconia Co-Doped with Ytterbia.

The effect of high-temperature aging for 4800 h at a temperature of 1123 K on the crystal structure and the conductivity of (ZrO)(ScO)(YbO) and (ZrO)(ScO)(YbO) single-crystal membranes were studied. Such membrane lifetime testing is critical to the operation of solid oxide fuel cells (SOFCs). The crystals were obtained by the method of directional crystallization of the melt in a cold crucible.

Stability of the Structural and Transport Characteristics of (ZrO)(ScO)(RO) (R-Yb, Y, Tb, Gd) Electrolytic Membranes to High-Temperature Exposure.

The effect of long-term high-temperature annealing on the phase composition, local crystal structure, and oxygen-ion conductivity of SOFC membranes based on zirconium dioxide solid solutions was studied. Crystals with the composition of (ZrO)(ScO)(RO) (where x = 0.08-0.

Data on physical and electrical properties of (ZrO)(ScO)(CeO) and (ZrO)(ScO)(CeO)(YO) solid solution crystals.

The data presented in this article are related to the research article entitled "Phase stability and transport characteristics of (ZrO)(ScO)(СeO) and (ZrO)(ScO)(СeO)(YO) solid solution crystals" https://www.sciencedirect.com/science/article/pii/S2352340917302329 [1].

[Aspiration in intraligamentous anesthesia].

The authors conducted a prospective, randomized, crossover study of positive aspiration frequency in intraligamentous anesthesia (ILA). The aims of the study were (1) to determine the frequency of positive aspiration in ILA and (2) to evaluate the depth of the pulp anesthesia in lower first molar (L6) by means of electrotesting in positive or negative aspiration. Intraligamentous injections with 4% articaine with epinephrine in L6 were carried out with computer syringe in 36 dental students.