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Preparation method of ceramic sagger for positive electrode material of lithium battery
The invention discloses a preparation method of a ceramic sagger for a positive electrode material of a lithium battery, and belongs to the technical field of preparation of ceramic refractory materials. According to the method, kaolin natural mineral associated with rare earth is directly used as a raw material, and kaolin is decomposed into mullite and fused with rare earth elements by controlling temperature and time during sintering through pretreatment of the front-end raw material, research and blending of ceramic components and powder forming and sintering. The high-performance and low-cost ceramic material for the high-purity mullite sagger is obtained. The content of mullite in the ceramic material is as high as 98.8%, mullite grains are of needle-column-shaped interlocking structures, the length-diameter ratio is high, and the mullite grains are uniform and compact; the relative density can reach 97.47%; the sagger material is high in strength, and the micro Vickers hardness and the bending strength of the sagger material reach 13.06 GPa and 167 MPa respectively; the sagger has the characteristics of high temperature resistance, corrosion resistance, thermal shock resistance, long service life and the like, and the surface of the sagger does not have peeling and pulverization phenomena after 30 times of sintering trial of a simulated lithium cobalt oxide positive electrode material.
本发明公开一种锂电池正极材料用陶瓷匣钵的制备方法，属于陶瓷耐火材料制备技术领域。本发明所述方法直接以伴生稀土的高岭土天然矿物为原料，通过前端原料的预处理，陶瓷成分研究及调配，粉料成形及烧结，并在烧结中通过控制温度和时间使高岭土在分解为莫来石的同时与稀土元素互相溶合，获得高性能、低成本的高纯莫来石匣钵用陶瓷材料。该陶瓷材料莫来石含量高达98.8％，莫来石晶粒呈针、柱状互锁结构、长径比较高、均匀致密；其相对密度可达97.47％；该匣钵材料强度高，显微维氏硬度和抗弯强度分别达到13.06GPa、167MPa；具有耐高温、耐腐蚀性、抗热震、高使用寿命等特点，经模拟钴酸锂正极材料烧结试用30次后，匣钵表面未出现剥落和粉化现象。
Preparation method of ceramic sagger for positive electrode material of lithium battery
The invention discloses a preparation method of a ceramic sagger for a positive electrode material of a lithium battery, and belongs to the technical field of preparation of ceramic refractory materials. According to the method, kaolin natural mineral associated with rare earth is directly used as a raw material, and kaolin is decomposed into mullite and fused with rare earth elements by controlling temperature and time during sintering through pretreatment of the front-end raw material, research and blending of ceramic components and powder forming and sintering. The high-performance and low-cost ceramic material for the high-purity mullite sagger is obtained. The content of mullite in the ceramic material is as high as 98.8%, mullite grains are of needle-column-shaped interlocking structures, the length-diameter ratio is high, and the mullite grains are uniform and compact; the relative density can reach 97.47%; the sagger material is high in strength, and the micro Vickers hardness and the bending strength of the sagger material reach 13.06 GPa and 167 MPa respectively; the sagger has the characteristics of high temperature resistance, corrosion resistance, thermal shock resistance, long service life and the like, and the surface of the sagger does not have peeling and pulverization phenomena after 30 times of sintering trial of a simulated lithium cobalt oxide positive electrode material.
本发明公开一种锂电池正极材料用陶瓷匣钵的制备方法，属于陶瓷耐火材料制备技术领域。本发明所述方法直接以伴生稀土的高岭土天然矿物为原料，通过前端原料的预处理，陶瓷成分研究及调配，粉料成形及烧结，并在烧结中通过控制温度和时间使高岭土在分解为莫来石的同时与稀土元素互相溶合，获得高性能、低成本的高纯莫来石匣钵用陶瓷材料。该陶瓷材料莫来石含量高达98.8％，莫来石晶粒呈针、柱状互锁结构、长径比较高、均匀致密；其相对密度可达97.47％；该匣钵材料强度高，显微维氏硬度和抗弯强度分别达到13.06GPa、167MPa；具有耐高温、耐腐蚀性、抗热震、高使用寿命等特点，经模拟钴酸锂正极材料烧结试用30次后，匣钵表面未出现剥落和粉化现象。
Preparation method of ceramic sagger for positive electrode material of lithium battery
一种锂电池正极材料用陶瓷匣钵的制备方法
ZHANG JIAMIN (author) / GAO XIONG (author) / FENG XUERU (author) / ZHANG DENG (author) / GAN GUOYOU (author) / DAI ZONGMING (author) / DU JINGHONG (author) / PENG YUQING (author) / PAN ZHICHENG (author)
2022-12-27
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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