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Sagger for roasting lithium battery positive electrode material and preparation method thereof
The invention discloses a sagger for roasting a lithium battery positive electrode material and a preparation method thereof, and belongs to the technical field of saggers for roasting lithium battery positive electrode materials. At present, the sagger for roasting the lithium battery positive electrode material is mainly made of a mullite cordierite material. The formula takes mullite, cordierite and aluminum oxide as main raw materials. The matrix main crystal phase is mullite. The saggar is cracked due to temperature change in the recycling process. Most products are peeled and dropped due to alkali erosion after being recycled for about 10 times. The barium carbonate, the magnesium aluminate spinel, the alpha-aluminum oxide and the Suzhou soil powder are introduced into the formula, the celsian is synthesized in situ, the principal crystalline phase of a matrix is celsian, the thermal expansion coefficient of the matrix is reduced, and the thermal shock resistance is improved; more prominently, the alkali corrosion resistance of the sagger is greatly improved. Meanwhile, the thermal expansion coefficient of magnesium aluminate spinel is greatly different from that of mullite cordierite, so that the toughness of the material is enhanced, and the impact strength and thermal shock resistance of the sagger are improved.
一种锂电池正极材料焙烧用匣钵及其制备方法，属于锂电池正极材料焙烧用匣钵技术领域。目前锂电池正极材料焙烧用匣钵，主要是莫来石堇青石质材料。配方以莫来石、堇青石、氧化铝为主要原料。基质主晶相为莫来石。该类匣钵循环使用过程中因温度的变化发生开裂的现象。多数产品的循环使用10次左右就会因碱侵蚀而起皮掉渣。本发明在配方中引入碳酸钡、镁铝尖晶石、α‑氧化铝及苏州土粉料，原位合成钡长石，其基质的主晶相是钡长石，降低了基质的热膨胀系数，提高了抗热震性能；更为突出是极大的提高了匣钵的抗碱侵蚀性能。同时，由于镁铝尖晶石与莫来石堇青石热膨胀系数存在较大差别，增强了材料的韧性，提高了匣钵的抗冲击强度和抗热震性能。
Sagger for roasting lithium battery positive electrode material and preparation method thereof
The invention discloses a sagger for roasting a lithium battery positive electrode material and a preparation method thereof, and belongs to the technical field of saggers for roasting lithium battery positive electrode materials. At present, the sagger for roasting the lithium battery positive electrode material is mainly made of a mullite cordierite material. The formula takes mullite, cordierite and aluminum oxide as main raw materials. The matrix main crystal phase is mullite. The saggar is cracked due to temperature change in the recycling process. Most products are peeled and dropped due to alkali erosion after being recycled for about 10 times. The barium carbonate, the magnesium aluminate spinel, the alpha-aluminum oxide and the Suzhou soil powder are introduced into the formula, the celsian is synthesized in situ, the principal crystalline phase of a matrix is celsian, the thermal expansion coefficient of the matrix is reduced, and the thermal shock resistance is improved; more prominently, the alkali corrosion resistance of the sagger is greatly improved. Meanwhile, the thermal expansion coefficient of magnesium aluminate spinel is greatly different from that of mullite cordierite, so that the toughness of the material is enhanced, and the impact strength and thermal shock resistance of the sagger are improved.
一种锂电池正极材料焙烧用匣钵及其制备方法，属于锂电池正极材料焙烧用匣钵技术领域。目前锂电池正极材料焙烧用匣钵，主要是莫来石堇青石质材料。配方以莫来石、堇青石、氧化铝为主要原料。基质主晶相为莫来石。该类匣钵循环使用过程中因温度的变化发生开裂的现象。多数产品的循环使用10次左右就会因碱侵蚀而起皮掉渣。本发明在配方中引入碳酸钡、镁铝尖晶石、α‑氧化铝及苏州土粉料，原位合成钡长石，其基质的主晶相是钡长石，降低了基质的热膨胀系数，提高了抗热震性能；更为突出是极大的提高了匣钵的抗碱侵蚀性能。同时，由于镁铝尖晶石与莫来石堇青石热膨胀系数存在较大差别，增强了材料的韧性，提高了匣钵的抗冲击强度和抗热震性能。
Sagger for roasting lithium battery positive electrode material and preparation method thereof
一种锂电池正极材料焙烧用匣钵及其制备方法
ZHANG XINNIAN (author) / QIAN YUDONG (author) / GAO JIANLI (author)
2021-05-07
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
/
F27D
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