The solid solutions of the (1-x)Na0.5Bi0.5TiO₃-xNa0.5K0.5NbO₃ system were produced by the conventional ceramic technology using mechanical activation of the synthesized product. It was found that in the (1-x)Na0.5Bi0.5TiO₃-xNa0.5K0.5NbO₃ system at room temperature, a number of morphotropic phase transitions occur: rhombohedral → cubic → tetragonal → monoclinic phases. The introduction of a small amount of Na0.5K0.5NbO₃ leads to an increase in the temperature stability of the dielectric properties of ceramics. A change in the relaxor properties of the solid solutions of the (1-x)Na0.5Bi0.5TiO₃-xNa0.5K0.5NbO₃ system was shown. The increase in energy density and energy efficiency was found at additive 10mol.% of Na0.5K0.5NbO₃.

PbZrO₃-based antiferroelectric (AFE) ceramics are promising dielectrics for high-energy-density capacitors due to their reversible phase transitions during charge–discharge cycles. In this work, a new composition series, [Pb0.93−xLa0.02(Li1∕2Bi1∕2)xSr0.04][Zr0.57Sn0.34Ti0.09]O₃, with Li+ and Bi3+ substitution of Pb2+ at x=0, 0.04, 0.08, 0.12, 0.16 is investigated for the microstructure evolution, ferroelectric (FE) and dielectric properties. It is found that Li+ and Bi3+ substitution can significantly reduce the sintering temperature and simultaneously enhance the dielectric breakdown strength. An ultrahigh energy efficiency (94.0%) and a large energy density (3.22J/cm3) are achieved in the composition of x=0.12 with a low sintering temperature (1075^∘C).

Ferroelectric ceramics have the potential to be widely applied in the modern industry and military power systems due to their ultrafast charging/discharging speed and high energy density. Considering the structural design and electrical properties of ferroelectric capacitor, it is still a challenge to find out the optimal energy storage of ferroelectric ceramics during the phase-transition process of amorphous/nanocrystalline and polycrystalline. In this work, a finite element model suitable for the multiphase ceramic system is constructed based on the phase field breakdown theory. The nonlinear coupling relationship of multiple physical fields between multiphase ceramics was taken into account in this model. The basic structures of multiphase ceramics are generated by using the Voronoi diagram construction method. The specified structure of multiphase ceramics in the phase-transition process of amorphous/nanocrystalline and polycrystalline was further obtained through the grain boundary diffusion equation. The simulation results show that the multiphase ceramics have an optimal energy storage in the process of amorphous polycrystalline transformation, and the energy storage density reaches the maximum when the crystallinity is 13.96% and the volume fraction of grain is 2.08%. It provides a research plan and idea for revealing the correlation between microstructure and breakdown characteristics of multiphase ceramics. This simulation model realizes the nonlinear coupling of the multiphase ceramic mesoscopic structure and the phase field breakdown. It provides a reference scheme for the structural design and performance optimization of ferroelectric ceramics.

超级电容器是良好的储能器件，具有功率密度高、使用寿命长、充电速度快等优点。激光诱导石墨烯（LIG）是一种常见的双电层电容器电极材料，但LIG双电层电容器通常表现出较低的电化学性能，而活性物质的掺入会提高超级电容器性能。针对如何控制活性物质的掺入问题，提出一种基于激光直写表面滴涂硝酸铁［Fe（NO₃）₃］的聚酰亚胺（PI）薄膜以制备LIG-Fe₃O₄复合物电极的微型超级电容器的方法。激光处理过的区域会同时发生PI薄膜烧蚀与Fe（NO₃）₃分解，产生Fe₃O₄与LIG复合的LIG-Fe₃O₄复合物电极。所制备的LIG-Fe₃O₄复合物微型超级电容器性能与LIG微型超级电容器相比提高了7.58倍。所提方法为制备高性能LIG微型超级电容器提供了一条新途径。

近红外光写入的光激励发光材料不仅能推进光激励发光材料在信息存储领域的实用化进程，也能在生物成像和编码方面发挥独到的作用。然而，近红外光写入型的高容量光激励发光材料仍旧十分缺乏。首先以具有热辅助紫外光激发增值填充容量的BaSi₂O₅∶Eu²⁺，Nd³⁺材料作为基础，进一步掺杂Yb³⁺离子实现近红外光的热转化，然后复合含有蓝、紫光发射的NaYF₄∶Yb³⁺，Tm³⁺上转换发光材料，成功展示了980 nm激光调控的强度复用光存储。本研究不仅提供了一种高效的近红外光写入型的光激励信息存储材料，还表明了基于热辅助光激励发光材料构建高效近红外光写入的高简效性。

在光学俘获和操控单原子的实验中, 激光的低频强度噪声通常会加热原子, 从而缩短其存储时间并破坏其内态相干性。我们采用了一种基于电光振幅调制器(EOAM)的单级反馈环路来抑制激光低频噪声, 实现了0～1MHz的强度噪声的有效抑制, 100 kHz以下的噪声可降低20 dB, 500 kHz以下的噪声可降低10 dB。噪声抑制的频率范围涵盖了光学偶极阱的典型参量加热频率。将该装置用于单个铯原子实验将单个原子在偶极阱中的存储时间延长两个数量级, 测量的退相干时间也增加了5倍。

(Pb0.8Ba0.2)[(Zn1/3Nb2/3)0.7Ti0.3]O₃ relaxor-type ferroelectric ceramics was obtained via classical solid-state reaction. The hysteresis loop results were discussed in the frame of ergodicity criterium around the characteristic ferroelectric relaxor freezing temperature. Slimer hysteresis loops were observed below the freezing temperature reflecting an ergodic relaxor behavior. Above this temperature, estimated around 223K for the studied system, larger and unsaturated like ferroelectric hysteresis loops were observed. This temperature also coincides with the slope change on maximum polarization and inflection point of remnant polarization curves. Energy storage, energy loss and efficiency values were determined in a wide temperature range. While the recoverable energy density shows relatively low values (0.23J/cm³), there are interesting behaviors for this parameter and for the efficiency, since the two physical quantities increase versus temperature and the efficiency even reaches the value of 97%.