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Method for preparing high-entropy ceramic through electric field assisted sintering and high-entropy ceramic
The invention discloses a method for preparing high-entropy ceramic through electric field assisted sintering and the high-entropy ceramic, and the method comprises the following steps: 1, taking BaCO3, Na2CO3, SrCO3, CaCO3, TiO2 and Bi2O3 powder according to a chemical formula (NaBiBaSrCa) 0.2 TiO3, 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, presintering is carried out, wet ball milling, drying and sieving are carried out in sequence, and (NaBiBaSrCa) 0.2 TiO3 powder is obtained; 3, putting the (NaBiBaSrCa) 0.2 TiO3 powder into a mold, and pressing the (NaBiBaSrCa) 0.2 TiO3 powder to obtain a (NaBiBaSrCa) 0.2 TiO3 ceramic green body; 4, the (NaBiBaSrCa) 0.2 TiO3 ceramic green body is placed in a tubular furnace, the temperature is increased to 600 DEG C from the room temperature at the heating rate of 10 DEG C/min, then an electric field with the voltage of 150-250 V/cm and the current density of 30 mA/mm < 2 > is applied to the two ends of the ceramic green body, flash burning continues for 60 s from the flash burning phenomenon, and the high-entropy ceramic is obtained and has the high energy storage efficiency, the high energy storage density and the excellent dielectric property.
本发明公开了一种电场辅助烧结制备高熵陶瓷的方法及高熵陶瓷，方法包括步骤：1、按化学式(NaBiBaSrCa)0.2TiO3，取BaCO3、Na2CO3、SrCO3、CaCO3、TiO2和Bi2O3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，预烧，依次湿法球磨、烘干和过筛，得到(NaBiBaSrCa)0.2TiO3粉体；3、将(NaBiBaSrCa)0.2TiO3粉体放入模具，压制得到(NaBiBaSrCa)0.2TiO3陶瓷生坯；4、将(NaBiBaSrCa)0.2TiO3陶瓷生坯置于管式炉中，以10℃/min的升温速率自室温升温至600℃，接着在陶瓷生坯的两端施加电压为150～250V/cm、电流密度为30mA/mm2的电场，从发生闪烧现象开始，持续闪烧60s，得到高熵陶瓷，具有高储能效率和高储能密度以及优异的介电性能。
Method for preparing high-entropy ceramic through electric field assisted sintering and high-entropy ceramic
The invention discloses a method for preparing high-entropy ceramic through electric field assisted sintering and the high-entropy ceramic, and the method comprises the following steps: 1, taking BaCO3, Na2CO3, SrCO3, CaCO3, TiO2 and Bi2O3 powder according to a chemical formula (NaBiBaSrCa) 0.2 TiO3, 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, presintering is carried out, wet ball milling, drying and sieving are carried out in sequence, and (NaBiBaSrCa) 0.2 TiO3 powder is obtained; 3, putting the (NaBiBaSrCa) 0.2 TiO3 powder into a mold, and pressing the (NaBiBaSrCa) 0.2 TiO3 powder to obtain a (NaBiBaSrCa) 0.2 TiO3 ceramic green body; 4, the (NaBiBaSrCa) 0.2 TiO3 ceramic green body is placed in a tubular furnace, the temperature is increased to 600 DEG C from the room temperature at the heating rate of 10 DEG C/min, then an electric field with the voltage of 150-250 V/cm and the current density of 30 mA/mm < 2 > is applied to the two ends of the ceramic green body, flash burning continues for 60 s from the flash burning phenomenon, and the high-entropy ceramic is obtained and has the high energy storage efficiency, the high energy storage density and the excellent dielectric property.
本发明公开了一种电场辅助烧结制备高熵陶瓷的方法及高熵陶瓷，方法包括步骤：1、按化学式(NaBiBaSrCa)0.2TiO3，取BaCO3、Na2CO3、SrCO3、CaCO3、TiO2和Bi2O3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，预烧，依次湿法球磨、烘干和过筛，得到(NaBiBaSrCa)0.2TiO3粉体；3、将(NaBiBaSrCa)0.2TiO3粉体放入模具，压制得到(NaBiBaSrCa)0.2TiO3陶瓷生坯；4、将(NaBiBaSrCa)0.2TiO3陶瓷生坯置于管式炉中，以10℃/min的升温速率自室温升温至600℃，接着在陶瓷生坯的两端施加电压为150～250V/cm、电流密度为30mA/mm2的电场，从发生闪烧现象开始，持续闪烧60s，得到高熵陶瓷，具有高储能效率和高储能密度以及优异的介电性能。
Method for preparing high-entropy ceramic through electric field assisted sintering and high-entropy ceramic
一种电场辅助烧结制备高熵陶瓷的方法及高熵陶瓷
PU YONGPING (author) / NING YATING (author)
2024-07-30
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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