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High-temperature stable high-entropy ceramic material with excellent energy storage performance and preparation method of high-temperature stable high-entropy ceramic material
The invention discloses a high-temperature stable high-entropy ceramic material with excellent energy storage performance and a preparation method thereof.The preparation method comprises the steps that firstly, according to the molar ratio of (Ba0. 3Sr0. 7) TiO3, (Na0. 5Bi0. 5) TiO3 and (K0. 5Bi0. 5) TiO3, raw materials, absolute ethyl alcohol and zirconium oxide ballstone are subjected to ball milling and mixing, after drying and calcining are conducted respectively, (Ba0. 3Sr0. 7) TiO3 powder, (Na0. 5Bi0. 5) TiO3 powder and (K0. 5Bi0. 5) TiO3 powder are obtained, according to the molar ratio of (Ba0. 12Sr0. 28K0. 3xBi0. 3Nax) TiO3 (x is larger than or equal to 0.125 and smaller than or equal to 0.2 The preparation method comprises the following steps: drying the raw materials to obtain final material powder, pre-pressing the material powder through a mold, carrying out cold isostatic pressing, and sintering at 1220-1250 DEG C for 4 hours to obtain the high-entropy perovskite ceramic, the high-entropy perovskite ceramic has good energy storage performance that Wrec is equal to 2.07 J/cm < 3 > and eta is equal to 84.5% in a low electric field of 210kV/cm, the change amplitudes of Wrec and eta in a range of 40-140 DEG C are respectively less than 4.9% and 2.0%, and the energy storage performance is good at a temperature of 42-317 DEG C, the energy storage performance is good, and the energy storage performance is good. The excellent high-temperature dielectric stability of delta epsilon r/epsilon 150 DEG C is less than or equal to +/-15%, the high dielectric constant at 150 DEG C is 3259, and the ultralow dielectric loss is 0.002.
本发明公开了一种储能性能优异的高温稳定型高熵陶瓷材料及其制备方法，首先，根据(Ba0.3Sr0.7)TiO3，(Na0.5Bi0.5)TiO3和(K0.5Bi0.5)TiO3化学式摩尔比，将原料、无水乙醇、氧化锆球石球磨混合，分别烘干煅烧后得到(Ba0.3Sr0.7)TiO3，(Na0.5Bi0.5)TiO3和(K0.5Bi0.5)TiO3粉体，将得到的三种粉体按照(Ba0.12Sr0.28K0.3‑xBi0.3Nax)TiO3(0.125≤x≤0.2)化学式摩尔比，球磨混合，烘干后得到最终材料粉体，将材料粉体通过模具预压成型，经过冷等静压压制后在1220～1250℃温度下烧结4h后得到高熵钙钛矿陶瓷，该高熵陶瓷在210kV/cm的低电场下获得了Wrec＝2.07J/cm3，η＝84.5％，在40～140℃范围内Wrec和η的变化幅度分别小于4.9％和2.0％的良好储能性能，在42～317℃，Δεr/ε150℃≤±15％的优异高温介电稳定性，同时150℃下～3259的高介电常数，以及～0.002的超低介电损耗。
High-temperature stable high-entropy ceramic material with excellent energy storage performance and preparation method of high-temperature stable high-entropy ceramic material
The invention discloses a high-temperature stable high-entropy ceramic material with excellent energy storage performance and a preparation method thereof.The preparation method comprises the steps that firstly, according to the molar ratio of (Ba0. 3Sr0. 7) TiO3, (Na0. 5Bi0. 5) TiO3 and (K0. 5Bi0. 5) TiO3, raw materials, absolute ethyl alcohol and zirconium oxide ballstone are subjected to ball milling and mixing, after drying and calcining are conducted respectively, (Ba0. 3Sr0. 7) TiO3 powder, (Na0. 5Bi0. 5) TiO3 powder and (K0. 5Bi0. 5) TiO3 powder are obtained, according to the molar ratio of (Ba0. 12Sr0. 28K0. 3xBi0. 3Nax) TiO3 (x is larger than or equal to 0.125 and smaller than or equal to 0.2 The preparation method comprises the following steps: drying the raw materials to obtain final material powder, pre-pressing the material powder through a mold, carrying out cold isostatic pressing, and sintering at 1220-1250 DEG C for 4 hours to obtain the high-entropy perovskite ceramic, the high-entropy perovskite ceramic has good energy storage performance that Wrec is equal to 2.07 J/cm < 3 > and eta is equal to 84.5% in a low electric field of 210kV/cm, the change amplitudes of Wrec and eta in a range of 40-140 DEG C are respectively less than 4.9% and 2.0%, and the energy storage performance is good at a temperature of 42-317 DEG C, the energy storage performance is good, and the energy storage performance is good. The excellent high-temperature dielectric stability of delta epsilon r/epsilon 150 DEG C is less than or equal to +/-15%, the high dielectric constant at 150 DEG C is 3259, and the ultralow dielectric loss is 0.002.
本发明公开了一种储能性能优异的高温稳定型高熵陶瓷材料及其制备方法，首先，根据(Ba0.3Sr0.7)TiO3，(Na0.5Bi0.5)TiO3和(K0.5Bi0.5)TiO3化学式摩尔比，将原料、无水乙醇、氧化锆球石球磨混合，分别烘干煅烧后得到(Ba0.3Sr0.7)TiO3，(Na0.5Bi0.5)TiO3和(K0.5Bi0.5)TiO3粉体，将得到的三种粉体按照(Ba0.12Sr0.28K0.3‑xBi0.3Nax)TiO3(0.125≤x≤0.2)化学式摩尔比，球磨混合，烘干后得到最终材料粉体，将材料粉体通过模具预压成型，经过冷等静压压制后在1220～1250℃温度下烧结4h后得到高熵钙钛矿陶瓷，该高熵陶瓷在210kV/cm的低电场下获得了Wrec＝2.07J/cm3，η＝84.5％，在40～140℃范围内Wrec和η的变化幅度分别小于4.9％和2.0％的良好储能性能，在42～317℃，Δεr/ε150℃≤±15％的优异高温介电稳定性，同时150℃下～3259的高介电常数，以及～0.002的超低介电损耗。
High-temperature stable high-entropy ceramic material with excellent energy storage performance and preparation method of high-temperature stable high-entropy ceramic material
一种储能性能优异的高温稳定型高熵陶瓷材料及其制备方法
LI XIN (author) / LIU SENWEI (author) / WANG ZHUO (author) / CUI YONGFEI (author)
2024-11-01
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2023
| European Patent Office | 2024
| European Patent Office | 2024
| European Patent Office | 2023