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Sodium bismuth titanate-strontium titanate high-energy-storage lead-free ceramic material and preparation method thereof
The invention relates to the technical field of ceramic materials, and discloses a sodium bismuth titanate-strontium titanate high-energy-storage lead-free ceramic material, and the nominal chemical formula of the material is 50 mol% of Na < 0.5 > Bi < 0.5 > TiO < 3 >-50 mol% of Sr TiO < 3 >-x wt% of Nb < 2 > O < 5 >-y wt% of Sm < 2 > O < 3 >-z wt% of Hf O < 2 >. Wherein x is more than 1 and less than 2, y is more than 0.8 and less than 1.2, and z is more than 3 and less than 4.8. The preparation method comprises the following steps: proportioning according to the stoichiometric ratio of the formula, carrying out ball milling by taking absolute ethyl alcohol as a ball milling medium, uniformly mixing, and drying; adding a PVA (Polyvinyl Alcohol) binder, granulating, tabletting and discharging glue to obtain a ceramic biscuit body; and carrying out flash sintering treatment under the conditions that the electric field intensity is 280-380V/cm and the current intensity is 2.5-3.5 A/cm < 2 >, and sintering for 100-400s at the temperature of 650-750 DEG C to obtain the ceramic block material. The preparation method is novel in preparation process, relatively low in cost, free of lead element, environment-friendly, relatively high in energy storage density, high in charging and discharging speed and high in thermal stability, and has a good industrialization prospect in the field of dielectric energy storage ceramics.
本发明涉及陶瓷材料技术领域，且公开了一种钛酸铋钠‑钛酸锶高储能无铅陶瓷材料，该材料的名义化学式为50mol％Na0.5Bi0.5TiO3‑50mol％SrTiO3‑xwt％Nb2O5‑ywt％Sm2O3‑zwt％HfO2。其中1＜x＜2,0.8＜y＜1.2,3＜z＜4.8。其制备方法如下：按照上述配方的计量比进行配料后以无水乙醇为球磨介质，球磨混合均匀后烘干；加入PVA粘结剂，造粒、压片、排胶得到陶瓷素胚体；在电场强度为280‑380V/cm，电流强度为2.5‑3.5A/cm2条件下进行闪烧处理，650‑750℃烧结100‑400s，得陶瓷块体材料。本发明制备工艺新颖，且成本相对低廉，不含有铅元素，对环境友好，具有较高的储能密度及快速的充放电速度，热稳定性强，在电介质储能陶瓷领域具有良好的产业化前景。
Sodium bismuth titanate-strontium titanate high-energy-storage lead-free ceramic material and preparation method thereof
The invention relates to the technical field of ceramic materials, and discloses a sodium bismuth titanate-strontium titanate high-energy-storage lead-free ceramic material, and the nominal chemical formula of the material is 50 mol% of Na < 0.5 > Bi < 0.5 > TiO < 3 >-50 mol% of Sr TiO < 3 >-x wt% of Nb < 2 > O < 5 >-y wt% of Sm < 2 > O < 3 >-z wt% of Hf O < 2 >. Wherein x is more than 1 and less than 2, y is more than 0.8 and less than 1.2, and z is more than 3 and less than 4.8. The preparation method comprises the following steps: proportioning according to the stoichiometric ratio of the formula, carrying out ball milling by taking absolute ethyl alcohol as a ball milling medium, uniformly mixing, and drying; adding a PVA (Polyvinyl Alcohol) binder, granulating, tabletting and discharging glue to obtain a ceramic biscuit body; and carrying out flash sintering treatment under the conditions that the electric field intensity is 280-380V/cm and the current intensity is 2.5-3.5 A/cm < 2 >, and sintering for 100-400s at the temperature of 650-750 DEG C to obtain the ceramic block material. The preparation method is novel in preparation process, relatively low in cost, free of lead element, environment-friendly, relatively high in energy storage density, high in charging and discharging speed and high in thermal stability, and has a good industrialization prospect in the field of dielectric energy storage ceramics.
本发明涉及陶瓷材料技术领域，且公开了一种钛酸铋钠‑钛酸锶高储能无铅陶瓷材料，该材料的名义化学式为50mol％Na0.5Bi0.5TiO3‑50mol％SrTiO3‑xwt％Nb2O5‑ywt％Sm2O3‑zwt％HfO2。其中1＜x＜2,0.8＜y＜1.2,3＜z＜4.8。其制备方法如下：按照上述配方的计量比进行配料后以无水乙醇为球磨介质，球磨混合均匀后烘干；加入PVA粘结剂，造粒、压片、排胶得到陶瓷素胚体；在电场强度为280‑380V/cm，电流强度为2.5‑3.5A/cm2条件下进行闪烧处理，650‑750℃烧结100‑400s，得陶瓷块体材料。本发明制备工艺新颖，且成本相对低廉，不含有铅元素，对环境友好，具有较高的储能密度及快速的充放电速度，热稳定性强，在电介质储能陶瓷领域具有良好的产业化前景。
Sodium bismuth titanate-strontium titanate high-energy-storage lead-free ceramic material and preparation method thereof
一种钛酸铋钠-钛酸锶高储能无铅陶瓷材料及其制备方法
LI TIANYU (Autor:in) / CHAO QIANQIAN (Autor:in) / ZHOU CONG (Autor:in) / ZUO RUZHONG (Autor:in)
01.09.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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