Grain size effect on the dielectric property of Ba0.5Sr0.5TiO3 ceramic/barium boroaluminosilicate glass composites
Source abstract
Abstract
In this study, Ba0.5Sr0.5TiO3(BST) ceramics with alkali-free multi-component(Ba-B-Al-Si) glass were developed and their properties were investigated. Oxalate co-precipitation method has been applied to obtain BST nanopowders. The powders with different grain size were employed to fabricate BST/Ba-B-Al-Si glass composites. The parameters, such as the sintering temperature, dielectric constant and breakdown strength were studied. The result indicated that the dielectric constant decreased with decreasing grain size, while the breakdown strength increased, compared with coarse-grained composites, the breakdown strength of 60nm fine-grained composites increased by 30%. Electric field simulations were performed using Ansys Maxwell software to calculate and visualize the electric field distribution within the BST/Ba-B-Al-Si glass composites material. Electric field simulation results demonstrate that ceramics with fine-grains exhibit a more uniform electric field distribution, thus possessing a higher breakdown strength compared to coarse-grains, which closely aligns with our experimental measurements.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Microwave Dielectric Ceramics Synthesis · Ferroelectric and Piezoelectric Materials · Dielectric properties of ceramics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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