Research progress on high energy storage density antiferroelectric materials in Fujian Institute of Structures

[ Instrument R&D of Instrument Network ] As a key basic functional material, antiferroelectric materials have excellent performances such as high energy storage density, good temperature stability, fast charge and discharge time and good fatigue resistance. They are widely used in displacement drives, High-power pulsed power supplies, energy storage capacitors and other devices are international hotspots for the study of new energy sources, smart materials and devices. Due to the difficulty of growing anti-ferroelectric single crystals, the current research reports mainly focus on the ceramic system, and less about anti-ferroelectric single crystals.
With the support of the Chinese Academy of Sciences' strategic leading science and technology project, the National Natural Science Foundation of China and the Youth Science Foundation project, and the Fujian Industrial Guidance Project, Long Xifa team, a researcher of the Key Laboratory of Optoelectronic Materials Chemistry and Physics of the Chinese Academy of Sciences, adopted component design. Solved the growth problem of Pb(Lu0.5Nb0.5)O3-based antiferroelectric single crystal, obtained the bulk crystal material with the size up to 20mm×18mm×10mm, and realized the electric field induced secondary ferroelectric-ferroelectric phase through the composition control The variable behavior greatly enhances the saturation polarization intensity of the material, and ultimately obtains a substantial increase in energy storage density. The effective energy storage density of single crystal material reaches 4.81J/cm3, and the energy storage efficiency is as high as 82.36%. The study also deeply explored the correlation between the phase structure, crystallographic orientation and microstructure characteristics of crystals and high electrical storage density and other excellent electrical properties, which provided new ideas for exploring new antiferroelectric materials.
Related achievements were published on ACS Appl. Mater. Inter. with the title of Enhanced Energy Storage Density of Lead Lutetium Niobate Crystals by Electric Field-Induced Secondary Phase Transition via Na/La Co-doping. Assistant researcher Yang Xiaoming was the first author and researcher of the paper He Chao is the corresponding author.

rotary valve

The unloader is divided into three types: normal type, pressure type, and high temperature type. The unloader can be driven at a constant speed, continuously discharging material at a controlled rate, or with variable speed drive, the unloader is used as a feeder. Unloader general type: It can be used on the normal materials below 150 degrees and normal temperature, and can continuously and uniformly feed material into the feeding pipe, and in the system and separation.The dust collection department can also serve as a unloader. Unloader pressure type: it uses a closed rotor, can be widely used in the suction type, pressure feed air conveying system and negative pressure conveying equipment, rotary discharge.The device can ensure that the pressure of the air flow inside the delivery pipe does not leak, and it can safely transport and collect the materials. Therefore, in this respect, it is called a lock-in gasifier, which not only can withstand pressure, while having common features.

Rotary Valve

Feed Valve,Rotating Valve,Rotary Feeder Valve,Rotary Control Valve

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