Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for preparing high-entropy ceramic based on flash burning variable current and high-entropy ceramic
The invention discloses a method for preparing high-entropy ceramic based on flash sintering variable current and the high-entropy ceramic, and the method comprises the following steps: 1, taking Bi2O3, BaCO3, Na2CO3, SrCO3, CaCO3 and TiO2 powder according to a chemical formula (Bi0. 2Ba0. 2Na0. 2Sr0. 2Ca0. 2) 0. 2TiO3, carrying out wet ball milling mixing, and drying to obtain a mixture A; 2, the mixture A is placed in a crucible, the crucible is placed in a muffle furnace to be pre-sintered, the pre-sintered powder is sequentially subjected to wet ball milling, drying and sieving, and (Bi0. 2Ba0. 2Na0. 2Sr0. 2Ca0. 2) 0. 2TiO3 powder is obtained; 3, putting the (Bi < 0.2 > Ba < 0.2 > Na < 0.2 > Sr < 0.2 > Ca < 0.2 >) < 0.2 > TiO < 3 > powder into a mold, and performing compression molding to obtain a high-entropy ceramic green body; and 4, placing the high-entropy ceramic green body in a tubular furnace, heating from room temperature to 650 DEG C at a heating rate of 10 DEG C/min, then applying an electric field with a voltage of 150V/cm and a current density of 20-40mA/mm < 2 > to two ends of the ceramic green body, and continuing flash burning for 60s from the occurrence of a flash burning phenomenon to obtain the high-entropy ceramic with high energy storage density.
本发明公开了一种基于闪烧变电流制备高熵陶瓷的方法及高熵陶瓷，方法包括步骤：1、按照化学式(Bi0.2Ba0.2Na0.2Sr0.2Ca0.2)0.2TiO3，取Bi2O3、BaCO3、Na2CO3、SrCO3、CaCO3和TiO2粉体，采用湿法球磨混合，烘干后，得到混合物A；2、将混合物A置于坩埚中，将坩埚置于马弗炉内进行预烧，将预烧后的粉体依次湿法球磨、烘干和过筛，得到(Bi0.2Ba0.2Na0.2Sr0.2Ca0.2)0.2TiO3粉体；3、将(Bi0.2Ba0.2Na0.2Sr0.2Ca0.2)0.2TiO3粉体放入模具，压制成型，得到高熵陶瓷生胚；4、将高熵陶瓷生胚置于管式炉中，以10℃/min的升温速率自室温升温至650℃，接着在陶瓷生坯的两端施加电压为150V/cm、电流密度为20～40mA/mm2的电场，从发生闪烧现象开始，持续闪烧60s，得到高熵陶瓷，具有高储能密度。
Method for preparing high-entropy ceramic based on flash burning variable current and high-entropy ceramic
The invention discloses a method for preparing high-entropy ceramic based on flash sintering variable current and the high-entropy ceramic, and the method comprises the following steps: 1, taking Bi2O3, BaCO3, Na2CO3, SrCO3, CaCO3 and TiO2 powder according to a chemical formula (Bi0. 2Ba0. 2Na0. 2Sr0. 2Ca0. 2) 0. 2TiO3, carrying out wet ball milling mixing, and drying to obtain a mixture A; 2, the mixture A is placed in a crucible, the crucible is placed in a muffle furnace to be pre-sintered, the pre-sintered powder is sequentially subjected to wet ball milling, drying and sieving, and (Bi0. 2Ba0. 2Na0. 2Sr0. 2Ca0. 2) 0. 2TiO3 powder is obtained; 3, putting the (Bi < 0.2 > Ba < 0.2 > Na < 0.2 > Sr < 0.2 > Ca < 0.2 >) < 0.2 > TiO < 3 > powder into a mold, and performing compression molding to obtain a high-entropy ceramic green body; and 4, placing the high-entropy ceramic green body in a tubular furnace, heating from room temperature to 650 DEG C at a heating rate of 10 DEG C/min, then applying an electric field with a voltage of 150V/cm and a current density of 20-40mA/mm < 2 > to two ends of the ceramic green body, and continuing flash burning for 60s from the occurrence of a flash burning phenomenon to obtain the high-entropy ceramic with high energy storage density.
本发明公开了一种基于闪烧变电流制备高熵陶瓷的方法及高熵陶瓷，方法包括步骤：1、按照化学式(Bi0.2Ba0.2Na0.2Sr0.2Ca0.2)0.2TiO3，取Bi2O3、BaCO3、Na2CO3、SrCO3、CaCO3和TiO2粉体，采用湿法球磨混合，烘干后，得到混合物A；2、将混合物A置于坩埚中，将坩埚置于马弗炉内进行预烧，将预烧后的粉体依次湿法球磨、烘干和过筛，得到(Bi0.2Ba0.2Na0.2Sr0.2Ca0.2)0.2TiO3粉体；3、将(Bi0.2Ba0.2Na0.2Sr0.2Ca0.2)0.2TiO3粉体放入模具，压制成型，得到高熵陶瓷生胚；4、将高熵陶瓷生胚置于管式炉中，以10℃/min的升温速率自室温升温至650℃，接着在陶瓷生坯的两端施加电压为150V/cm、电流密度为20～40mA/mm2的电场，从发生闪烧现象开始，持续闪烧60s，得到高熵陶瓷，具有高储能密度。
Method for preparing high-entropy ceramic based on flash burning variable current and high-entropy ceramic
一种基于闪烧变电流制备高熵陶瓷的方法及高熵陶瓷
PU YONGPING (Autor:in) / NING YATING (Autor:in)
30.07.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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