Enhanced Dielectric, Piezoelectric, and Mechanical Performances of Barium Strontium Titanate-Modified (Bi0.487Na0.487La0.017)TiO3 Lead-Free Ceramics

The (1−x)(Bi 0.487 Na 0.487 La 0.017 )TiO 3 -x(Ba 0.7 Sr 0.3 )TiO 3 or BNLT-BST were fabricated by a solid-state mixed oxide. With increasing BST content, a phase transition from the BNLT rhombohedral to the BST tetragonal was observed. The addition of BST inhibited grain growth which resulted in th...

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Bibliographic Details
Published in:Integrated ferroelectrics 2021-01, Vol.213 (1), p.209-220
Main Authors: Jaita, Pharatree, Jarupoom, Parkpoom
Format: Article
Language:English
Subjects:
Barium strontium titanates
Ceramics
Densification
dielectric
Dielectric properties
Grain growth
Lead free
Lead-free piezoelectric
leakage current density
mechanical
Phase transitions
piezoelectric voltage constant
Piezoelectricity
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Summary:The (1−x)(Bi 0.487 Na 0.487 La 0.017 )TiO 3 -x(Ba 0.7 Sr 0.3 )TiO 3 or BNLT-BST were fabricated by a solid-state mixed oxide. With increasing BST content, a phase transition from the BNLT rhombohedral to the BST tetragonal was observed. The addition of BST inhibited grain growth which resulted in the improvement of the densification, mechanical and dielectric properties. The maximum of HV (6.68 GPa), HK (6.61 GPa), E (89 GPa), K IC (1.55 MPa m 1/2 ), ε r (1911) and tan δ (0.0394) were observed for the x = 0.20 ceramic. The highest d 33 (140 pC/N) and g 33 (12.69 × 10 −3   Vm/N) were observed for the x = 0.05 ceramic. The J decreased while ρ increased with an increasing amount of the additive.
ISSN:1058-4587
1607-8489
DOI:10.1080/10584587.2020.1864078