The colossal permittivity effect on BaTiO3 induced by different sinter atmosphere

Xu, Ke; Zhu, Guisheng; Xu, Huarui; Zhao, Yunyun; Jiang, Kunpeng; Zhang, Xiuyun; Yin, Hao; Shangguan, Mingnan; Wan, Le; Huang, T.

doi:10.1007/s00339-022-06201-9

Cited by 12 publications

(2 citation statements)

References 50 publications

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“…The Ba 3d5/2 state can be deconvoluted into two peaks, one at ≈778.66 eV marked as BaI which is assigned to Ba 2+ ion in the perovskite structure of BaTiO 3 , and the other one at ≈779.99 eV marked as BaII which is related to the Ba‐site in the glass matrix. [ 29 , 30 , 31 , 32 ] According to the deconvoluted results of the Ba 3d5/2 state, as depicted in Figure 2a , the relative amount of BaI (BaI / (BaI+BaII)) decreases firstly and then increases when the electric field strength increases from 0 to 7 kV cm −1 . The variation of the BaI relative amount for each BTAS glass ceramic sample is given in Figure 2d .…”

Section: Resultsmentioning

confidence: 99%

“…The OI peaks ≈529.49 eV can be assigned to the lattice oxygen in the BaTiO 3 crystal grains, [ 30 , 33 ] the OII peaks at ≈530.70 eV can be attributed to NBO in glass matrix, [ 29 ] the OIII peaks around 531.68 eV can be assigned to the bridging oxygen (BO) in glass matrix [ 29 ] and the OIV peaks located at larger than 532.00 eV are related to the chemical absorbed ‐OH due to ethanol cleaning after grinding and polishing, which are excluded from the estimation of the relative amounts of OI and OII. [ 30 , 33 ] It should be noted that due to a quite low Raman scattering intensity of Al‐O − stretching vibration (Figure 1b ), the OII peaks should mainly consist of NBO associated with Ba = O or Ba‐O‐Q [i] (Q [i] represents differently coordinated units in the glass matrix). Based on Figure 2b , the relative contents of OI (OI / (OI+OII+OIII)) and OII (OII / (OI+OII+OIII)) for the different BTAS glass ceramics were calculated and plotted in Figure 2d .…”

Section: Resultsmentioning

confidence: 99%

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Along with the demand for further miniaturization of high and pulsed power devices, it becomes more and more important to realize ultrahigh recoverable energy storage density (Wrec) with high energy storage efficiency (η) and ultrahigh discharge energy storage density (Wd) accompanied by high power density (Pd) in dielectrics. To date, it remains, however, a big challenge to achieve high Wrec or Wd in glass ceramics compared to other dielectric energy storage materials. Herein, a strategy of defect formation modulation is applied to form “amorphous‐disordered‐ordered” microstructure in BaTiO3‐based glass ceramics so as to achieve a high Wrec of 12.04 J cm−3 with a high η of 81.1% and an ultrahigh Wd of 11.98 J cm−3 with a superb Pd of 973 MW cm−3. This work demonstrates a feasible route to obtain glass ceramics with an outstanding energy storage performance and proves the enormous potential of glass ceramics in high and pulsed power applications.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Wei,

et al. 2023

Advanced Science

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A key challenge currently for the new ferroelectric refrigeration with high efficiency and environmental friendliness lies in the urgent demand for ferroelectric materials with huge electrocaloric effects (ECE). Ferroelectric polycrystalline ceramics with high ECE stand out as one of the most promising candidates for electrocaloric cooling applications. However, the grain boundary network, as a barrier for the cross‐transmission of charged carriers, widely exists in electrocaloric polycrystalline ceramics and is often neglected in favor of focusing more on composition regulation and structural design. Herein, a grain boundary barrier engineering is proposed that regulates the Schottky barrier at the grain boundary network in the Ba0.8Zr0.2TiO3 ceramics by a maneuverable annealing process and clarifies its critical role in enhancing the ECE of polycrystalline ceramics. As a result, a substantial enhancement of the EC performance (from 0.68 to 1.63 K at 50 °C and 80 kV cm−1, ≈2.4 times) has been achieved in the annealed Ba0.8Zr0.2TiO3 ceramics with a lower Schottky barrier. The microstructural and electrical characterization reveals that the lower Schottky barrier in the grain boundary network facilitates the domain switching and electronic transition, hence resulting in enhanced polarization response and EC performance.

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The colossal permittivity effect on BaTiO3 induced by different sinter atmosphere

Cited by 12 publications

References 50 publications

Boosting Energy Storage Performance of Glass Ceramics via Modulating Defect Formation During Crystallization

Boosting Energy Storage Performance of Glass Ceramics via Modulating Defect Formation During Crystallization

Significant Enhancement of Electrocaloric Effect in Ferroelectric Polycrystalline Ceramics Through Grain Boundary Barrier Engineering

Heterostructured piezocatalytic nanoparticles with enhanced ultrasound response for efficient repair of infectious bone defects

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