泡沫微晶玻璃的研究进展

文章介绍了泡沫微晶玻璃的性能及应用，综述了泡沫微晶玻璃的研究进展，并对泡沫微晶玻璃的发展方向做了展望。     

泡沫微晶玻璃的研究进展

概述了泡沫微晶玻璃的性能及应用,综述了泡沫微晶玻璃的研究进展,并对泡沫微晶玻璃的发展方向进行了展望.     

泡沫微晶玻璃的研究进展

概述了泡沫微晶玻璃的性能及应用,综述了泡沫微晶玻璃的研究进展,并对泡沫微晶玻璃的发展方向进行了展望。     

微晶玻璃新材料

本文简介了几种近年来新开发的微晶玻璃新材料,如高强度、高韧性微晶玻璃,表面高压缩增强微晶玻璃,纤维增强微晶玻璃复合材料,氟云母微晶玻璃柔性无机膜,发光透明微晶玻璃,核废料固化用微晶玻璃,生体修补用微晶玻璃及微晶玻璃建筑材料等.     

光敏微晶玻璃新材料

本文介绍光微晶玻璃新材料制备方法、产品性能、用途及应用意义。     

高强粉煤灰微晶玻璃

采用正交试验方法研究了CaO-MgO-Al2O3-SiO2系统中粉煤灰微晶玻璃的主晶相,用X射线衍射仪(XRD)和扫描电镜(SEM)分别对材料的物相组成和显微结构进行了研究。结果表明,粉煤灰微晶玻璃的主晶相为透辉石[CaMg(Si2O6)],晶体形貌呈颗粒状,晶粒尺寸约1μm,三点抗弯强度高达196.81MPa。     

Relaxor antiferroelectric ceramics with ultrahigh efficiency for energy storage applications

Enhancing the efficiency in energy storage capacitors minimizes energy dissipation and improves device durability. A new efficiency-enhancement strategy for antiferroelectric ceramics, imposing relaxor characteristics through forming solid solutions with relaxor compounds, is demonstrated in the present work. Using the classic antiferroelectric (Pb_0.97La_0.02)(Zr_1-x-_ySn_xTi_y)O₃ as model base compositions, Bi(Zn_2/3Nb_1/3)O₃ is found to be most effective in producing the “relaxor antiferroelectric” behavior and minimizing the electric hysteresis. Specifically, a remarkable energy storage efficiency of 95.6% (with an energy density of 2.19 J/cm³ at 115 kV/cm) is achieved in the solid solution 0.90(Pb_0.97La_0.02)(Zr_0.65Sn_0.30Ti_0.05)O₃–0.10Bi(Zn_2/3Nb_1/3)O₃. The validated new strategy, hence, can guide the design of future relaxor antiferroelectric dielectrics for next generation energy storage capacitors.     

Study of the structure,electrical properties,and energy storage performance of ZnO-modified Ba0.65Sr0.245Bi0.07TiO3 Pb-free ceramics

Barium titanate ceramic is frequently used as a ferroelectric material and can be applied in the pulse power field in energy storage devices. Its properties, including dielectric, ferroelectric, and energy storage properties, can be significantly improved through doping. In this work, we prepared a series of (1-x)Ba_0.65Sr_0.245Bi_0.07TiO₃-xZnO (x = 0.005, 0.01, 0.02, 0.03) lead-free bulk relaxor ferroelectric ceramics by a traditional die-pressing processing route. The uniformity of the grain sizes for these ceramics was improved, and the grains were refined when a certain amount of ZnO was introduced into BaTiO₃-based ceramics. In addition, the breakdown strength was improved in the case where the relaxor behavior was not significantly improved. It should be noted that the sample doped with 0.02 mol Zn showed the maximum room-temperature storage density (1.51 J/cm³) at the largest electric field strength (210 kV/cm). At the same time, this ceramic exhibited good stability to temperature (60–150 °C) and frequency (10–100 Hz) variations, as well as fantastic fatigue resistance (10,000 charge-discharge cycles). This paper presents in-depth studies of the structure, morphology, electrical properties, and energy storage performance of ZnO-modified BaTiO₃-based ceramics.     

LiTaO3 assisted giant strain and thermally stable energy storage response for renewable energy storage applications

Piezoceramics with composition (1–z) [Bi_0.5(Na_0.84K_0.16)_0.5TiO₃]_0.96–0.04SrTiO₃–zLiTaO₃ (z = 0.00–0.030) were formulated by ordinary firing process following by rapid quenching treatment. Effect of LiTaO₃ on the structural, electrical and energy-storage properties were analyzed. For the composition with molar ratio 0.025, room temperature large-field piezoelectric coefficient (S_max/E_max = d₃₃*) of 885 pm/V at 3.6 kV/mm was recorded. Furthermore, for compositions z = 0.025 and 0.030, broad temperature stable dielectric constants and low losses from ~135 to 350 °C with a small variation of ± 15% was observed. Additionally, the energy density for z = 0.025 was ~0.60 J/cm³ in the broader temperature range of 75–125 °C, along with the energy-storage efficiency of greater than 70%. These observations suggest that the studied piezo-material compositions are promising for the ceramic actuators and capacitor applications.     

Enhanced energy storage performances of CaTiO3-based ceramic through A-site Sm3+ doping and A-site vacancy

Ceramic-based capacitors for energy storage devices require simultaneously high energy density and efficiency. Achieving high electric breakdown field based on linear dielectrics is crucial. Here, A-site Sm³⁺ doped perovskite Ca_1-1.5xSm_x□_0.5xTiO₃ ceramics with introduced A-site vacancies (V_A) were prepared. All Ca_1-1.5xSm_x□_0.5xTiO₃ ceramics crystallize in an orthorhombic structure, with lattice constants a, b, and c linearly decreased. As a result of Sm³⁺ dopants and V_A, the grain size decreased while the ceramics’ density was improved. The permittivity decreases from 176 (x = 0) to 135 (x = 0.1), but tanδ is effectively constrained (～10^?4). What’s more, the dielectric breakdown strength is significantly improved from 429 kV/cm (x = 0) to 547 kV/cm (x = 0.1) with dielectric linearity is maintained. The optimum energy storage density of 2 J/cm³ (x = 0.02) with ultrahigh energy efficiency of over 93.7 % is achieved, which are superior to many existing linear dielectrics and relaxor ferroelectrics. This work confirms the energy-storage enhancement through chemical modifications and microstructural engineering.     

High energy storage density and discharging efficiency in La3+/Nb5+-co-substituted (Bi0.5Na0.5)0.94Ba0.06TiO3 ceramics

In this work, [(Bi_1-xLa_x)_0.5Na_0.5]_0.94Ba_0.06(Ti_1-5y/4Nb_y)O₃ ceramics have been developed by the dual-substitution of La³⁺ for Bi³⁺ and Nb⁵⁺ for Ti⁴⁺ and prepared by an ordinary sintering technique. All ceramics can be well-sintered at 1200 °C. The addition of La³⁺ and Nb⁵⁺ reduces the grain size and improve the dielectric breakdown strength of the ceramics; moreover, after the introduction of La³⁺ and Nb⁵⁺, the remanent polarization of the ceramics is significantly reduced, while the maximum polarization remains the same large value as that of the ceramic without the doping of La³⁺ and Nb⁵⁺. As a result, high energy storage density and discharge efficiency are achieved at x/y = 0.07/0.02, giving the large storage density of 1.83 J/cm³ and high discharging efficiency of 70%. The present work presents a feasible strategy to develop energy storage materials based on perovskite ferroelectrics by the partial substitutions in the A and B sites.     

High energy storage performance in Ca-doped PbZrO3 antiferroelectric films

In this work, antiferroelectric Pb_1-xCa_xZrO₃ (PCZ) thin films with different concentrations of Ca²⁺ were prepared by chemical solution deposition, and the effects of Ca²⁺ concentration on the antiferroelectric properties and energy storage performance were investigated. The results show that the optimal Ca²⁺ concentration in the PCZ thin films is x = 0.12 for electric properties and energy storage performance. The recoverable energy storage density and energy storage efficiency is 50.2 J/cm³ and 83.1 % at 2800 kV/cm, which is 261 % and 44.8 % higher than those of the PbZrO₃ (PZ) films. These effects are attributed to the enhancement of stability of antiferroelectric phase, diffuseness in the field-induced phase transition and electric breakdown strength by Ca²⁺-doping in the PZ films. Our results demonstrate that doping an appropriate amount of Ca²⁺ ions in antiferroelectric thin films is an effective way to improve their energy storage performance.     

Significantly enhanced energy storage density in sodium bismuth titanate-based ferroelectrics under low electric fields

Bi_0.5Na_0.5TiO₃ (BNT)-based ferroelectrics have received more and more attention due to their environment-friendliness and large maximum polarization. Herein, the enhanced energy-storage properties of BNT-based ceramics were successfully prepared by introducing multi-ions (La³⁺, K⁺, Al³⁺, Nb⁵⁺, Zr⁴⁺) to improve the breakdown strength and simultaneously suppress the remnant polarization. An excellent discharge energy-storage density (W_d) of 3.24 J cm⁻³ and a high energy-storage efficiency (η) of 82 % under 200 kV cm^-1 have been recorded for Bi_0.44La_0.06(Na_0.82K_0.18)_0.5Ti_0.90(Al_0.5Nb_0.5)_0.08Zr_0.02O₃ ceramic. Meanwhile, the outstanding thermal stability with W_d of 1.84–1.96 J·cm⁻³ were also achieved in 25−125 °C at 140 kV cm^-1. More importantly, piezoresponse force microscopy reveals that the threshold voltage for inducing long range order enhances while the stability of polar nanoregions (PNRs) on the nanoscale decreased with the increase of La doping amount, leading to more linear polarization behavior and higher energy-storage properties. These results promote the practical applications of BNT-based ferroelectrics in advanced pulsed power systems.     

Effects of crystallization temperature on phase evolution and energy storage properties of BaO-Na2O-Nb2O5-SiO2-Al2O3 glass-ceramics

Barium sodium niobate (BNN) glass ceramics were successfully fabricated with controllable crystallization by technology for heating processing and the effects of crystallization temperatures on phase evolution, microstructure, dielectric properties and breakdown strength were investigated systematically. In addition, the empirical power-law dependence of breakdown strength on thickness ($E_b\propto d^{-n}$) was confirmed in BNN glass-ceramic system with an exponent n of 0.21. Based on the results, the BNN glass ceramic crystallized at 800?°C presents a remarkable breakdown strength (BDS) of 2322?kV/cm with the tested thickness of 30?μm, and the highest energy density of 16.6?J/cm³ was achieved.     

A new family of sodium niobate-based dielectrics for electrical energy storage applications

Although tremendous achievements have been made in enhancing recoverable energy storage density (W_rec) of lead-free dielectric ceramics for electrical energy storage applications in recent years, these ceramics with high W_rec still have two disadvantages: complex chemical composition and difficult preparation process. In this work, we selected NaNbO₃ (NN)-based ceramics as base materials and used Bi₂O₃ as a sintering aid to reduce porosity and enhance dielectric breakdown strengths. Encouragingly, high W_rec, simple chemical composition and facile preparation process were simultaneously realized in 0.77NaNbO₃-0.23BaTiO₃ (0.77NN-0.23BT) ceramics. A large W_rec of 1.5 J cm^?3 at 175 kV cm^?1 and excellent thermal stability (variation of W_rec < 15% over the temperature range of 20?140 °C) were simultaneously achieved in 0.77NN-0.23BT ceramics. More importantly, this work could bring out the development of a series of NN-based ceramics for electrical energy storage in the future such as NN-ABO₃ (A = Ca and Sr; B = Ti and Zr).     

Performance optimization of Mg-rich bismuth-magnesium-titanium thin films for energy storage applications

Due to advances in electronic device integration, miniaturization, and performance requirements, dielectric materials with a high energy storage density are required. Here, new BiMg_0.5Ti_0.5O₃ lead-free energy storage thin films with excess Mg (i.e., nominal BiMg_yTi_0.5O₃, with y = 0.50-0.62) were deposited on Pt/Ti/SiO₂/Si substrates by sol-gel and spin-coating methods. The introduction of excess Mg can obviously increase the dielectric breakdown strength of thin films due to the appearance of an amorphous phase. The maximum recoverable energy storage density increased from 26 J/cm³ at y = 0.50 to 44.1 J/cm³ at y = 0.56. Furthermore, the dielectric films exhibited excellent thermal stability of the energy storage density from 30 °C to 100 °C, indicating that bismuth-magnesium-titanium films are promising candidates for next-generation lead-free energy storage capacitor applications.