高压下限域复合体系的构筑及其结构变化规律数据

构筑了3种以上限域复合材料并获得了其高压下的结构变化规律。通过发展突破商用大腔体压机的压力极限的超高压产生关键技术，以压致富勒烯C60塌缩形成的非晶团簇作为新的构筑基元，合成了一种与晶体金刚石具有相同类型化学键的近全sp3非晶碳块体材料，具有优异的力、热、光学性能，创下多项非晶材料之最，是目前已知非晶材料中硬度、热导率最高的材料；通过含能分子调控作用，获得了新型的“无序”超硬非晶碳簇限域复合结构材料，并且首次实现了负体积压缩；通过富勒烯C60填充，促进氮化硼纳米管向Z-BN超硬新结构的压致转变，获得了C60@Z-BN复合限域体系; 发现了小分子限域复合体系的压致相变规律及其反常荧光响应效应；通过压力调控系列二维限域体系的晶体结构，实现RS-TaS2、2H-TaS2、1T-TaS2、TaSe2压致超导电性增强。More than 3 types of confined composite materials were constructed, and their structural evolution rules under high pressure were elucidated. By developing key ultra-high pressure generation technologies that break the pressure limit of commercial large-volume presses, we used the amorphous clusters formed by the pressure-induced collapse of fullerene C60 as new building blocks to synthesize a nearly fully sp3-bonded amorphous carbon bulk material that shares the same type of chemical bonds as crystalline diamond. Boasting excellent mechanical, thermal and optical properties, it has set multiple records for amorphous materials, and is the known amorphous material with the highest hardness and thermal conductivity to date. Through the regulation of energetic molecules, we obtained a novel "disordered" ultra-hard amorphous carbon cluster confined composite structural material, and realized negative volume compression for the first time. Through the filling of fullerene C60, we promoted the pressure-induced transition of boron nitride nanotubes to the ultra-hard new structure of Z-BN, and obtained the C60@Z-BN composite confined system. We discovered the pressure-induced phase transition laws and anomalous fluorescence response effects of small-molecule confined composite systems. By regulating the crystal structures of a series of two-dimensional confined systems via pressure, we achieved pressure-induced superconductivity enhancement in RS-TaS2, 2H-TaS2, 1T-TaS2 and TaSe2.

搜集汇总

背景与挑战

背景概述

该数据集聚焦于高压条件下多种限域复合体系的构筑及其结构演化规律研究。具体内容包括利用超高压技术合成近全sp3非晶碳块体材料、获得新型超硬非晶碳簇限域复合结构、构建C60@Z-BN复合体系，并揭示了小分子限域体系的压致相变规律与二维限域体系的压致超导电性增强现象。