Fruit Instrument Mini Probe Thermal Stage Helps Northeastern University School of Materials Science and Technology Complete Project Research

The team from the School of Materials Science and Technology at Northeastern University proposed a new lead-free TTBs relaxation ferroelectric ceramic Bi0.15Na0.15Sr0.3Ba0.4Nb2O6-1 wt% C6H5O7Na3, which achieved a Wrec of 9.53 J cm − 3 and an ultra-high η of 92% at 730 kV cm − 1. This represents a significant breakthrough in the performance of lead-free TTBs energy storage ceramics. By incorporating C6H5O7Na3, we effectively suppressed the concentration of oxygen vacancy defects, inhibited abnormal grain growth, and formed dense grain boundaries to prevent defect diffusion under external stimuli. These modifications enhance energy storage performance and excellent stability. This discovery not only validates the optimization strategy of TTBs based dielectric capacitors, but also introduces C6H5O7Na3 into lead-free relaxation ferroelectric ceramic systems. In summary, this work establishes a new design paradigm that integrates the characteristics of "lead-free components, high performance, and high stability", providing important technical support for the application of lead-free energy storage ceramics in pulse power systems and next-generation energy storage applications.

Article Title:《Optimization energy storage of tungsten bronze structure ceramics based on organic complexation defect engineering strategy

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Journal Name:《ScienceDirect》

Client Unit:Northeastern University

Fruit Instrument Mini Probe Station EH200 Mini

Application CasesThe team from the School of Materials Science and Technology at Northeastern University proposed to significantly improve the energy storage performance of Sr0.5Ba0.5Nb2O6 based tungsten bronze ceramics through A-site multi ion co doping and Sr/Ba ratio optimization based on multiple coordinated control strategies. After introducing Bi3+and Na+, the lone electron pair effect of Bi3+is utilized to enhance the spontaneous polarization response intensity. Meanwhile, the lattice distortion caused by the introduction of Bi3+is offset by the reduced radius of Na+. Further adjusting the Sr/Ba ratio can achieve grain refinement, promote the formation of polar nanoregions (PNRs), expand the band gap of the material, and enhance relaxation properties. Finally, the synergistic optimization of polarization strength and breakdown field strength was achieved. The synergistic effect results in the ceramic exhibiting a slender P-E ring, ultimately achieving a recoverable energy density (Wrec) of 6.38 J/cm3 and an energy storage efficiency (η) of up to 93%. This work proposes a novel component design concept for developing lead-free ceramic capacitors with high energy storage density and efficiency.

Article Title:《Multiple collaborative optimization strategy regulates tungsten bronze ceramics to achieve efficient energy storage performance》

Journal Name:《ScienceDirect》

Client Unit:Northeastern University

Application products:

Fruit Instrument Mini Probe Station EH200 Mini

Application products and parameters:

Temperature range: RT~200 ℃

Temperature stability: ± 0.1 ℃

Probe: High voltage probe holder+copper gold-plated probe

Sample stage: made of copper; φ20mm&4mm