Effect of K 2 O content on breakdown strength and energy-storage density in K 2 O-BaO-Nb 2 O 5 -SiO 2 glass-ceramics
Source abstract
Abstract
Abstract Phase evolution, dielectric properties, breakdown strength, and energy-storage performance were studied by varying K 2 O content in K 2 O-BaO-Nb 2 O 5 -SiO 2 glass-ceramics. It was found that dielectric loss with the increase of K 2 O content increases owing to the un-crystallized K 2 O into the glass network, while dielectric breakdown strength firstly increases and then decreases due to the competition between two physical mechanisms, i.e., interfacial polarization and bridging-oxygen bond broken by the non-bridging oxygen ions. With the increase of K 2 O content, energy-storage density firstly increased up to 12.06±0.69 J/cm 3 with a high breakdown strength of 1973 kV/cm, and then decreased. Also, the discharged efficiency is obtained as a high value of 92% from P-E hysteresis loops.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Dielectric materials and actuators · Microwave Dielectric Ceramics Synthesis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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