A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Preparation method of intermediate valence vanadium oxide electronic phase change material
The invention provides a quantitative preparation method of intermediate valence vanadium oxide electronic phase change powder and single crystals, belongs to the field of thermosensitive electronic phase change materials, and particularly relates to a method for preparing intermediate valence vanadium oxide electronic phase change powder and single crystals by using an additive with dual functions of a fluxing agent and heterogeneous seed crystals. The precursor required by material synthesis of the system is fully dissolved by virtue of the molten alkali metal halide fluxing agent, and the precursor is fully reacted in the process, so that the reaction temperature and the reaction time required by material synthesis are greatly reduced; the high-purity and high-uniformity polycrystalline or monocrystalline material can be prepared in an accurately controlled atmosphere, and continuous regulation and control of the transition temperature of the material metal insulator in a wide range can be realized by further regulating and controlling the valence state, the doping element type and the doping proportion of the vanadium element in the intermediate valence state vanadium oxide. The thermistor has a certain application prospect in the fields of strong light protection, infrared camouflage, thermochromism, sudden change type thermistor devices and the like.
本发明提出了一种中间价态钒氧化合物电子相变粉体及单晶的放量制备方法，属于热敏电子相变材料领域，具体地涉及一种通过使用具有助熔剂与异质籽晶双重作用的添加剂，通过借助熔融状碱金属卤化物助熔剂充分溶解该体系材料合成所需的前驱体，在此过程中前驱体充分反应，大幅降低材料合成所需反应温度与反应时间，可实现高纯度高均匀性的多晶形态或单晶形态的材料在精准控制的气氛下的放量制备，通过进一步调控中间价态钒氧化合物中钒元素的价态、掺杂元素种类及掺杂比例，可实现材料金属绝缘体转变温度在宽范围内的连续调控，在强光防护、红外伪装、热致变色和突变式热敏电阻器件等领域具有一定的应用前景。
Preparation method of intermediate valence vanadium oxide electronic phase change material
The invention provides a quantitative preparation method of intermediate valence vanadium oxide electronic phase change powder and single crystals, belongs to the field of thermosensitive electronic phase change materials, and particularly relates to a method for preparing intermediate valence vanadium oxide electronic phase change powder and single crystals by using an additive with dual functions of a fluxing agent and heterogeneous seed crystals. The precursor required by material synthesis of the system is fully dissolved by virtue of the molten alkali metal halide fluxing agent, and the precursor is fully reacted in the process, so that the reaction temperature and the reaction time required by material synthesis are greatly reduced; the high-purity and high-uniformity polycrystalline or monocrystalline material can be prepared in an accurately controlled atmosphere, and continuous regulation and control of the transition temperature of the material metal insulator in a wide range can be realized by further regulating and controlling the valence state, the doping element type and the doping proportion of the vanadium element in the intermediate valence state vanadium oxide. The thermistor has a certain application prospect in the fields of strong light protection, infrared camouflage, thermochromism, sudden change type thermistor devices and the like.
本发明提出了一种中间价态钒氧化合物电子相变粉体及单晶的放量制备方法，属于热敏电子相变材料领域，具体地涉及一种通过使用具有助熔剂与异质籽晶双重作用的添加剂，通过借助熔融状碱金属卤化物助熔剂充分溶解该体系材料合成所需的前驱体，在此过程中前驱体充分反应，大幅降低材料合成所需反应温度与反应时间，可实现高纯度高均匀性的多晶形态或单晶形态的材料在精准控制的气氛下的放量制备，通过进一步调控中间价态钒氧化合物中钒元素的价态、掺杂元素种类及掺杂比例，可实现材料金属绝缘体转变温度在宽范围内的连续调控，在强光防护、红外伪装、热致变色和突变式热敏电阻器件等领域具有一定的应用前景。
Preparation method of intermediate valence vanadium oxide electronic phase change material
一种中间价态钒氧化合物电子相变材料的制备方法
CHEN JIKUN (author) / SHANG YANLONG (author)
2024-11-05
Patent
Electronic Resource
Chinese
| European Patent Office | 2022
| European Patent Office | 2024
Low-valence zirconium oxide optical coating material and preparation method thereof
| European Patent Office | 2021
| European Patent Office | 2023
Zirconium oxide-based ceramic material without phase change and preparation method thereof
| European Patent Office | 2022