Grain size engineered lead-free ceramics with both large energy storage density and ultrahigh mechanical properties

Ultrahigh Energy-Storage Density in Antiferroelectric Ceramics with Field-Induced Multiphase Transitions

Superior comprehensive energy storage properties in Bi0.5Na0.5TiO3-based relaxor ferroelectric ceramics

Compared with fuel cells and electrochemical capacitors, dielectric capacitors are regarded as promising devices to store electrical energy for pulsed power systems due to their fast charge/discharge rates and ultrahigh power density. Dielectric materials are core components of dielectric capacitors and directly determine their performance. Over the past decade, extensive efforts have been devoted to develop high-performance dielectric materials for electrical energy storage applications and great progress has been achieved. Here, we present an overview on the current state-of-the-art lead-free bulk ceramics for electrical energy storage applications, including SrTiO3, CaTiO3, BaTiO3, (Bi0.5Na0.5)TiO3, (K0.5Na0.5)NbO3, BiFeO3, AgNbO3 and NaNbO3-based ceramics. This review starts with a brief introduction of the research background, the development history and the basic fundamentals of dielectric materials for energy storage applications as well as the universal strategies to optimize their energy storage performance. Emphases are placed on the design strategies for each type of dielectric ceramic based on their special physical properties with a summary of their respective advantages and disadvantages. Challenges along with future prospects are presented at the end of this review. This review will not only accelerate the exploration of higher performance lead-free dielectric materials, but also provides a deeper understanding of the relationship among chemical composition, physical properties and energy storage performance.

High-performance lead-free bulk ceramics for electrical energy storage applications: design strategies and challenges

Superior energy storage properties and excellent stability achieved in environment-friendly ferroelectrics via composition design strategy

Lead-free (K,Na)NbO3-based ceramics with high optical transparency and large energy storage ability

Transparency of K0.5N0.5NbO3–Sr(Mg1/3Nb2/3)O3 lead-free ceramics modulated by relaxor behavior and grain size

Considering the environment and human health, highly transparent lead-free (1 − x)K05Na05NbO3–xCa(Zn1/3Nb2/3)O3 (abbreviated as KNN–xCZN) piezoceramics were synthesized by a solid state reaction method The effects of Ca(Zn1/3Nb2/3)O3 on the microstructures, phase structures, characteristic frequency and electrical properties were investigated Fine grain and relaxor-like behaviors were obtained, and the Ca(Zn1/3Nb2/3)O3 also increased the crystal structure of the ceramics transformation from orthorhombic to pseudo-cubic It was found that the highest transmittance of 7042% (with a thickness of 05 mm in the visible spectrum) was obtained for the KNN–xCZN ceramics at x = 007, which was due to the high relative density, low apparent porosity, uniform and fine-grained microstructures, high symmetry of the pseudo-cubic structure, NbO6 octahedron reduced distortion and more relaxor-like behavior In addition, the transparent piezoelectric ceramics KNN–xCZN with x = 007 possessed high transmittance (∼84% at near-infrared wavelengths) and excellent electrical properties (er = 1162, d33 = 102 pC N−1) All of the above demonstrated that the KNN–xCZN ceramics could be promising lead-free transparent piezoceramics

/pdf/enhanced-transmittance-and-piezoelectricity-of-transparent-1f61uvf6dl.pdf

Qizhen Chai

Papers

Lead-free (K,Na)NbO3-based ceramics with high optical transparency and large energy storage ability

Transparency of K0.5N0.5NbO3–Sr(Mg1/3Nb2/3)O3 lead-free ceramics modulated by relaxor behavior and grain size

Enhanced transmittance and piezoelectricity of transparent K0.5Na0.5NbO3 ceramics with Ca(Zn1/3Nb2/3)O3 additives

Improved transmittance and ferroelectric properties realized in KNN ceramics via SAN modification

Relaxor behaviors and electric response in transparent 0.95(K0.5Na0.5NbO3)-0.05Ca(Zr ZnyNbz)1.025O3 ceramics with low-symmetric structure