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Perovskite structure high-entropy dielectric ceramic and preparation method thereof
The invention discloses a perovskite structure high-entropy dielectric ceramic and a preparation method thereof, and belongs to the field of inorganic dielectric ceramics. The chemical formula of the high-entropy dielectric ceramic with the perovskite structure is (La < 0.25 > Sr < 0.25 > Ba < 0.25 > Na < 0.25 >) (Ti < 0.5 > Me < 0.5 >) O < 3 > (M < e > = Sn, Zr or Hf). The preparation method comprises the following steps: firstly, weighing the raw materials BaCO3, TiO2, La2O3, SrCO3, Na2CO3, SnO2, ZrO2 and HfO2 according to the stoichiometric ratio; then uniformly mixing by adopting wet ball milling, drying, calcining, carrying out secondary ball milling, drying and grinding to obtain required mixed powder; adding a proper amount of polyvinyl alcohol into the mixed powder, uniformly mixing, and pressing into tablets in a mold; placing the pressed sheet in a closed double-layer alumina crucible in a buried sintering manner, and placing the crucible in a high-temperature box-type resistance furnace for sintering in an air atmosphere; the ceramic has the advantages of strong breakdown field, small remanent polarization, high energy storage efficiency, good temperature stability and the like, and has a wide application prospect in the field of inorganic dielectric capacitors.
本发明公开了一种钙钛矿结构高熵介电陶瓷及其制备方法，属于无机电介质陶瓷领域。本发明所述的钙钛矿结构高熵介电陶瓷，其化学式为(La0.25Sr0.25Ba0.25Na0.25)(Ti0.5Me0.5)O3(Me＝Sn,Zr,Hf)。其制备过程为：先按照化学计量比称取原料BaCO3、TiO2、La2O3、SrCO3、Na2CO3、SnO2、ZrO2、HfO2；然后采用湿法球磨混合均匀，经过干燥、煅烧后，再二次球磨、干燥、研磨得到所需的混合粉末；在混合粉末中加入适量的聚乙烯醇混合均匀后，放置模具中压制成片；采用埋烧的方式将压制片放置在密闭的双层氧化铝坩埚内，置于高温箱式电阻炉在空气气氛下烧结；该陶瓷具有击穿场强大、剩余极化强度小、储能效率高和温度稳定性好等优点，在无机介质电容器领域有着广阔的应用前景。
Perovskite structure high-entropy dielectric ceramic and preparation method thereof
The invention discloses a perovskite structure high-entropy dielectric ceramic and a preparation method thereof, and belongs to the field of inorganic dielectric ceramics. The chemical formula of the high-entropy dielectric ceramic with the perovskite structure is (La < 0.25 > Sr < 0.25 > Ba < 0.25 > Na < 0.25 >) (Ti < 0.5 > Me < 0.5 >) O < 3 > (M < e > = Sn, Zr or Hf). The preparation method comprises the following steps: firstly, weighing the raw materials BaCO3, TiO2, La2O3, SrCO3, Na2CO3, SnO2, ZrO2 and HfO2 according to the stoichiometric ratio; then uniformly mixing by adopting wet ball milling, drying, calcining, carrying out secondary ball milling, drying and grinding to obtain required mixed powder; adding a proper amount of polyvinyl alcohol into the mixed powder, uniformly mixing, and pressing into tablets in a mold; placing the pressed sheet in a closed double-layer alumina crucible in a buried sintering manner, and placing the crucible in a high-temperature box-type resistance furnace for sintering in an air atmosphere; the ceramic has the advantages of strong breakdown field, small remanent polarization, high energy storage efficiency, good temperature stability and the like, and has a wide application prospect in the field of inorganic dielectric capacitors.
本发明公开了一种钙钛矿结构高熵介电陶瓷及其制备方法，属于无机电介质陶瓷领域。本发明所述的钙钛矿结构高熵介电陶瓷，其化学式为(La0.25Sr0.25Ba0.25Na0.25)(Ti0.5Me0.5)O3(Me＝Sn,Zr,Hf)。其制备过程为：先按照化学计量比称取原料BaCO3、TiO2、La2O3、SrCO3、Na2CO3、SnO2、ZrO2、HfO2；然后采用湿法球磨混合均匀，经过干燥、煅烧后，再二次球磨、干燥、研磨得到所需的混合粉末；在混合粉末中加入适量的聚乙烯醇混合均匀后，放置模具中压制成片；采用埋烧的方式将压制片放置在密闭的双层氧化铝坩埚内，置于高温箱式电阻炉在空气气氛下烧结；该陶瓷具有击穿场强大、剩余极化强度小、储能效率高和温度稳定性好等优点，在无机介质电容器领域有着广阔的应用前景。
Perovskite structure high-entropy dielectric ceramic and preparation method thereof
一种钙钛矿结构高熵介电陶瓷及其制备方法
MENG BIN (Autor:in) / CHEN YINGQUAN (Autor:in) / LI RUI (Autor:in)
21.06.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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