Simultaneously with lower permittivity and higher tunability achieved in Ba0.5Sr0.5TiO3-Mg2SiO4-MgO composite ceramics prepared by spark plasma sintering

Xu, Zhibo; Fu, Zexing; Ling, Furi; Xu, Yebin

doi:10.1007/s10854-022-09123-7

Cited by 2 publications

(1 citation statement)

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“…Zhang et al achieved a tunability value of 17.3% and low permittivity of 830 at 30 kV/cm in 30 wt% BaCuSi 2 O 6 -70 wt% Ba 0.55 Sr 0.45 TiO 3 composite ceramics [18]. Though many works have achieved high tunability at low permittivity, the working electric field is usually more than 15 kV/cm [19,20]. The high-working electric field goes against the stability of tunability due to the influence of polar nano-regions (PNRs) at a repeating electric filed.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Tunability Achieving at Low Permittivity and Electric Field in (Ba0.91Ca0.09)(SnxZr0.2−xTi0.8)O3-2 mol% CuO-1 mol% Li2CO3 Ceramics

et al. 2023

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Ferroelectric varactors should have high tunability at low permittivity and a working electric field to obtain better impedance matching and stable tunability. In this work, (Ba0.91Ca0.09)(SnxZr0.2−xTi0.8)O3-2 mol% CuO-1 mol% Li2CO3 (abbreviated as BCSZT100x, x = 0.05, 0.10, 0.15 and 0.20, respectively) are prepared to achieve high tunability at low permittivity and a working electric field. The tunable mechanisms are investigated based on crystal structure, micro-morphology and the permittivity-temperature spectrum. The results show that the shrink of oxygen octahedron and weaker interaction force between Sn4+ and O2− make BCSZT5 ceramic have a higher tunability value of 26.55% at low permittivity (1913) and a working electric field (7.3 kV/cm). The tunability value of BCSZT5 ceramic increases by 58%, while its permittivity decreases by 25%, compared with x = 0. Those advantages make BCSZT5 ceramic have substantial application prospects in varactors.

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Section: Introductionmentioning

confidence: 99%