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    • 6. 发明授权
    • Method for making BaTiO3-based dielectric
    • 制备BaTiO3基电介质的方法
    • US06358464B1
    • 2002-03-19
    • US09693930
    • 2000-10-23
    • Byung Kee LeeYang Il JungHo Yong LeeSuk-Joong KangSung Yoon Chung
    • Byung Kee LeeYang Il JungHo Yong LeeSuk-Joong KangSung Yoon Chung
    • C04B3332
    • H01G4/1227C04B35/4682C04B35/626
    • A method for making a BaTiO3-based dielectric having a high dielectric constant and a low dielectric loss wherein, a BaTiO3-based body is subjected to a pre-heat treatment in a hydrogen (H2) atmosphere or a reducing atmosphere containing mixed gas of hydrogen and nitrogen in a ratio of hydrogen:nitrogen=5 to 100%:0 to 95% prior to a sintering process in the manufacture of dielectrics, in order to obtain a reduced average grain size of BaTiO3. By virtue of the reducing average grain size of BaTiO3, a BaTiO3-based dielectric having a high dielectric constant and a low dielectric loss is obtained. This method provides an advantage in that it is possible to make a BaTiO3-based dielectric having a very small average grain size while having a high relative density in accordance with a simple heat treatment conducted for pure BaTiO3 or even for BaTiO3 added with an additive in a reducing atmosphere at a temperature less than a liquid phase forming temperature, prior to a sintering process for sintering the BaTiO3.
    • 一种制备具有高介电常数和低介电损耗的BaTiO3基电介质的方法,其中将BaTiO 3基体在氢(H 2)气氛或含有氢气混合气体的还原气氛中进行预热处理 并且在制造电介质的烧结过程之前,氮:氮= 5〜100%:0〜95%的氮,以获得BaTiO 3的平均粒径的降低。 由于BaTiO 3的平均粒径减小,得到介电常数高,介电损耗低的BaTiO3系电介质。 该方法的优点在于,可以根据纯BaTiO 3或甚至添加添加剂的BaTiO 3的简单热处理,制造具有非常小的平均晶粒尺寸的BaTiO 3基电介质,同时具有高的相对密度 在烧结BaTiO 3的烧结工艺之前,在低于液相形成温度的温度下还原气氛。