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Composite rare earth oxide modified inert coating and preparation method thereof
The invention provides a preparation method of a composite rare earth oxide modified inert coating, which comprises the following steps: mixing polyvinyl alcohol, a solvent, Yb2O3 and CeO2 to obtain rare earth ceramic slurry; coating a ceramic matrix with the rare earth ceramic slurry to obtain a coating; and the coating is sequentially subjected to degumming and roasting, and the composite rare earth oxide modified inert coating is obtained. The Yb2O3 has relatively high melting point and chemical stability, has excellent heat resistance, corrosion resistance and high-temperature stability, and can improve the chemical compatibility with a melt; ceO2 belongs to a cubic system, is used as a sintering aid, is easy to form an eutectic liquid phase with the ceramic material, and is beneficial to realizing low-temperature densification, the coating is not easy to fall off, and the defects of mechanical burnt-on sand, inclusion and the like can be eliminated.
本发明提供了一种复合稀土氧化物改性惰性涂层的制备方法，包括以下步骤：将聚乙烯醇、溶剂、Yb2O3与CeO2混合，得到稀土陶瓷浆料；将所述稀土陶瓷浆料涂覆于陶瓷基体上，得到涂层；将所述涂层依次进行排胶和焙烧，得到复合稀土氧化物改性惰性涂层。本发明中Yb2O3具有相对较高的熔点和化学稳定性，具有优良的耐热、耐腐蚀和高温稳定性，能够提高与熔体的化学相容性；CeO2属于立方晶系，其作为烧结助剂，易与陶瓷材料形成共晶液相，有利于实现低温致密化，并且涂层不易脱落，能够消除机械粘砂及夹杂等缺陷。
Composite rare earth oxide modified inert coating and preparation method thereof
The invention provides a preparation method of a composite rare earth oxide modified inert coating, which comprises the following steps: mixing polyvinyl alcohol, a solvent, Yb2O3 and CeO2 to obtain rare earth ceramic slurry; coating a ceramic matrix with the rare earth ceramic slurry to obtain a coating; and the coating is sequentially subjected to degumming and roasting, and the composite rare earth oxide modified inert coating is obtained. The Yb2O3 has relatively high melting point and chemical stability, has excellent heat resistance, corrosion resistance and high-temperature stability, and can improve the chemical compatibility with a melt; ceO2 belongs to a cubic system, is used as a sintering aid, is easy to form an eutectic liquid phase with the ceramic material, and is beneficial to realizing low-temperature densification, the coating is not easy to fall off, and the defects of mechanical burnt-on sand, inclusion and the like can be eliminated.
本发明提供了一种复合稀土氧化物改性惰性涂层的制备方法，包括以下步骤：将聚乙烯醇、溶剂、Yb2O3与CeO2混合，得到稀土陶瓷浆料；将所述稀土陶瓷浆料涂覆于陶瓷基体上，得到涂层；将所述涂层依次进行排胶和焙烧，得到复合稀土氧化物改性惰性涂层。本发明中Yb2O3具有相对较高的熔点和化学稳定性，具有优良的耐热、耐腐蚀和高温稳定性，能够提高与熔体的化学相容性；CeO2属于立方晶系，其作为烧结助剂，易与陶瓷材料形成共晶液相，有利于实现低温致密化，并且涂层不易脱落，能够消除机械粘砂及夹杂等缺陷。
Composite rare earth oxide modified inert coating and preparation method thereof
一种复合稀土氧化物改性惰性涂层及其制备方法
YANG WEI (author) / HU XIAO (author) / CHEN XIAOFANG (author) / SHANG JINGLI (author) / CAI CHANGCHUN (author) / XU ZHIFENG (author)
2024-01-16
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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