New methods for the preparation and dielectric properties of Lа2−Sr NiO4 (х= 1/8) ceramic
Source abstract
Abstract
Abstract The perovskite-type oxide La 2− x Sr x NiO 4 ( x = 1/8) was prepared by a new precursor route. The reaction proceeds in the self-ignition mode. Single-phase powder and gas-tight ceramic samples can be produced by single annealing of decomposition products. It was shown that as a result of thermobaric treatment of La 2− x Sr x NiO 4 ( x = 1/8) the solid solution La 2− x Sr x NiO 4 with a higher concentration of strontium and the second phase La 3 Ni 2 O 7 are formed. Short-term (5 min) thermobaric treatment ( P = 2.5 GPa) at t ° = 900 °С changes the unit cell parameters, but is not accompanied by structural transitions. At the same time, morphological restructuring of the sample occurs—the agglomerates delaminate into thin plates crystals. It was established that the permittivity of the material exposed to thermobaric treatment is much higher compared to that of the sample annealed at atmospheric pressure and virtually does not depend on frequency in a wide temperature range.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Dielectric properties of ceramics · Ferroelectric and Piezoelectric Materials · Microwave Dielectric Ceramics Synthesis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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