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Ultrafine aluminum oxide for lithium battery ceramic diaphragm and preparation method thereof
The invention discloses ultrafine aluminum oxide for a lithium battery ceramic diaphragm and a preparation method thereof, and belongs to the technical field of alumina preparation. The preparation method of superfine aluminum oxide for a lithium battery ceramic diaphragm comprises the following steps of: (1) pulping an alumina raw material and water; carrying out primary grinding on the mixture;grinding the aluminum oxide slurry for 2-4h by using a zirconium oxide grinding ball with the diameter of 1mm until the particle size D50 is 0.5-0.8 micron; (2) sieving the ground aluminum oxide slurry with a 500-mesh sieve; adding PEG800 and PEG2000 into the aluminum oxide slurry, then grinding the aluminum oxide slurry for the second time, and using zirconium oxide grinding balls with the diameter of 0.4 mm for grinding the aluminum oxide slurry for 1.5 h to 2.5 h till the particle size D50 ranges from 0.3 micron to 0.5 micron; (3) sieving the ground aluminum oxide slurry with a 600-mesh sieve, dehydrating the obtained slurry to obtain an aluminum oxide filter cake, and drying the aluminum oxide filter cake; and (4) carrying out jet milling on the dried aluminum oxide, crushing agglomerated particles, removing impurities in the aluminum oxide, and then sieving with an 800-mesh sieve without oversize products to obtain aluminum oxide powder.
本发明公开了锂电池陶瓷隔膜用超细氧化铝及其制备方法，属氧化铝制备技术领域，一种锂电池陶瓷隔膜用超细氧化铝的制备方法，包括以下步骤：(1)将氧化铝原料与水打浆，然后对其进行第一次研磨，使用直径为1mm氧化锆磨球对氧化铝浆料研磨2‑4h至D50粒径为0.5‑0.8μm：(2)将研磨后的氧化铝浆料经500目过筛，在氧化铝浆料加入PEG800和PEG2000，然后对氧化铝浆料进行第二次研磨，使用直径为0.4mm氧化锆磨球对氧化铝浆料研磨1.5‑2.5h至D50粒径为0.3～0.5μm；(3)将研磨后的氧化铝浆料经600目过筛，将得到的浆液脱水得氧化铝滤饼，然后烘干干燥；(4)干燥后的氧化铝经气流粉碎，破碎团聚颗粒，去除氧化铝中的杂质，然后800目筛网过筛后无筛上物，得到氧化铝粉末。
Ultrafine aluminum oxide for lithium battery ceramic diaphragm and preparation method thereof
The invention discloses ultrafine aluminum oxide for a lithium battery ceramic diaphragm and a preparation method thereof, and belongs to the technical field of alumina preparation. The preparation method of superfine aluminum oxide for a lithium battery ceramic diaphragm comprises the following steps of: (1) pulping an alumina raw material and water; carrying out primary grinding on the mixture;grinding the aluminum oxide slurry for 2-4h by using a zirconium oxide grinding ball with the diameter of 1mm until the particle size D50 is 0.5-0.8 micron; (2) sieving the ground aluminum oxide slurry with a 500-mesh sieve; adding PEG800 and PEG2000 into the aluminum oxide slurry, then grinding the aluminum oxide slurry for the second time, and using zirconium oxide grinding balls with the diameter of 0.4 mm for grinding the aluminum oxide slurry for 1.5 h to 2.5 h till the particle size D50 ranges from 0.3 micron to 0.5 micron; (3) sieving the ground aluminum oxide slurry with a 600-mesh sieve, dehydrating the obtained slurry to obtain an aluminum oxide filter cake, and drying the aluminum oxide filter cake; and (4) carrying out jet milling on the dried aluminum oxide, crushing agglomerated particles, removing impurities in the aluminum oxide, and then sieving with an 800-mesh sieve without oversize products to obtain aluminum oxide powder.
本发明公开了锂电池陶瓷隔膜用超细氧化铝及其制备方法，属氧化铝制备技术领域，一种锂电池陶瓷隔膜用超细氧化铝的制备方法，包括以下步骤：(1)将氧化铝原料与水打浆，然后对其进行第一次研磨，使用直径为1mm氧化锆磨球对氧化铝浆料研磨2‑4h至D50粒径为0.5‑0.8μm：(2)将研磨后的氧化铝浆料经500目过筛，在氧化铝浆料加入PEG800和PEG2000，然后对氧化铝浆料进行第二次研磨，使用直径为0.4mm氧化锆磨球对氧化铝浆料研磨1.5‑2.5h至D50粒径为0.3～0.5μm；(3)将研磨后的氧化铝浆料经600目过筛，将得到的浆液脱水得氧化铝滤饼，然后烘干干燥；(4)干燥后的氧化铝经气流粉碎，破碎团聚颗粒，去除氧化铝中的杂质，然后800目筛网过筛后无筛上物，得到氧化铝粉末。
Ultrafine aluminum oxide for lithium battery ceramic diaphragm and preparation method thereof
锂电池陶瓷隔膜用超细氧化铝及其制备方法
TIAN YU (Autor:in) / ZHU QINGWEN (Autor:in) / YANG XIAOQIONG (Autor:in) / FANG MIN (Autor:in) / TIAN ZHIGANG (Autor:in) / ZHOU YINGTING (Autor:in)
27.11.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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