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Sodium bismuth titanate-based lead-free dielectric ceramic with high energy storage density and preparation method of sodium bismuth titanate-based lead-free dielectric ceramic
The invention discloses a sodium bismuth titanate-based lead-free dielectric ceramic with high energy storage density and a preparation method thereof, the chemical formula is (1-x-y) Bi0. 5Na0. 5TiO3-xSrTiO3-yBi (1-z) MezO3, Me is a trivalent metal ion or a trivalent composite ion in an equivalent valence state, x, y and z are molar fractions, 0.20 < = x < = 0.40, 0.01 < = y < = 0.3, and 0.01 < = z < = 0.2. The compact ceramic with controllable component structure gradient and fine and uniform crystal grains can be obtained by utilizing a flash sintering two-step sintering technology, and the compact ceramic has excellent energy storage density, lower Curie temperature and higher breakdown field strength. Wherein the energy storage density can reach 4.95 J/cm < 3 >, the Curie temperature is about 200 DEG C, and the relaxation characteristic is relatively high. The preparation method disclosed by the invention is simple and easy to operate, low in sintering temperature, energy-saving, short in preparation time, good in repeatability and good in practicability.
本发明公开一种钛酸铋钠基高储能密度无铅介电陶瓷及其制备方法，化学式为(1‑x‑y)Bi0.5Na0.5TiO3–xSrTiO3–yBi(1‑z)MezO3，其中Me为三价金属离子或者等效价态为三价复合离子，x、y、z为摩尔分数，0.20≤x≤0.40，0.01≤y≤0.3，0.01≤z≤0.2。本发明利用闪烧的两步烧结技术可以获得成分结构梯度可控、晶粒细小均匀的致密陶瓷，并具有优异的储能密度、较低的居里温度和较高的击穿场强。其中储能密度可以达到4.95J/cm3，居里温度处于200℃左右，具有较高的弛豫特征。本发明所述制备方法简单易于操作，烧结温度低，节约能源，制备时间短，可重复性好，具有良好的实用性。
Sodium bismuth titanate-based lead-free dielectric ceramic with high energy storage density and preparation method of sodium bismuth titanate-based lead-free dielectric ceramic
The invention discloses a sodium bismuth titanate-based lead-free dielectric ceramic with high energy storage density and a preparation method thereof, the chemical formula is (1-x-y) Bi0. 5Na0. 5TiO3-xSrTiO3-yBi (1-z) MezO3, Me is a trivalent metal ion or a trivalent composite ion in an equivalent valence state, x, y and z are molar fractions, 0.20 < = x < = 0.40, 0.01 < = y < = 0.3, and 0.01 < = z < = 0.2. The compact ceramic with controllable component structure gradient and fine and uniform crystal grains can be obtained by utilizing a flash sintering two-step sintering technology, and the compact ceramic has excellent energy storage density, lower Curie temperature and higher breakdown field strength. Wherein the energy storage density can reach 4.95 J/cm < 3 >, the Curie temperature is about 200 DEG C, and the relaxation characteristic is relatively high. The preparation method disclosed by the invention is simple and easy to operate, low in sintering temperature, energy-saving, short in preparation time, good in repeatability and good in practicability.
本发明公开一种钛酸铋钠基高储能密度无铅介电陶瓷及其制备方法，化学式为(1‑x‑y)Bi0.5Na0.5TiO3–xSrTiO3–yBi(1‑z)MezO3，其中Me为三价金属离子或者等效价态为三价复合离子，x、y、z为摩尔分数，0.20≤x≤0.40，0.01≤y≤0.3，0.01≤z≤0.2。本发明利用闪烧的两步烧结技术可以获得成分结构梯度可控、晶粒细小均匀的致密陶瓷，并具有优异的储能密度、较低的居里温度和较高的击穿场强。其中储能密度可以达到4.95J/cm3，居里温度处于200℃左右，具有较高的弛豫特征。本发明所述制备方法简单易于操作，烧结温度低，节约能源，制备时间短，可重复性好，具有良好的实用性。
Sodium bismuth titanate-based lead-free dielectric ceramic with high energy storage density and preparation method of sodium bismuth titanate-based lead-free dielectric ceramic
一种钛酸铋钠基高储能密度无铅介电陶瓷及其制备方法
LIU GUANG'AO (Autor:in) / ZHOU CONG (Autor:in) / FENG HAIPENG (Autor:in) / YUN FEIHU (Autor:in)
20.01.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
| Europäisches Patentamt | 2024
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| Europäisches Patentamt | 2024