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Cold sintering auxiliary preparation method of bismuth ferrite-barium titanate/barium ferrite composite ceramic with excellent ferroelectric property
The invention relates to the technical field of multiferroic materials, in particular to a cold sintering auxiliary preparation method of bismuth ferrite-barium titanate/barium ferrite composite ceramic with excellent ferroelectric performance. The cold sintering auxiliary preparation method comprises the following steps: (1) proportioning according to a correct stoichiometric ratio, ball-milling, drying and sieving to obtain powder; (2) calcining the prepared powder at high temperature, performing secondary ball milling, and sieving to obtain powder; (3) adding the obtained powder into polyvinyl alcohol (PVA with the concentration of 5wt%), grinding and uniformly mixing; (4) carrying out cold sintering treatment on the obtained powder at the pressure of 500MPa and the temperature of 180 DEG C to obtain a preliminarily densified ceramic green body; and (5) carrying out heat treatment on the obtained ceramic green body at different temperatures. After cold sintering treatment, the sintering temperature of the material can be obviously reduced, so that the grain size of the ceramic is refined, and the performance of the composite ceramic is improved.
本发明涉及多铁材料技术领域，具体涉及一种具有优异铁电性能的铁酸铋‑钛酸钡/钡铁氧体复合陶瓷冷烧结辅助制备方法：(1)按照正确化学计量比配料，球磨烘干，过筛得粉料；(2)将制得的粉料在高温下煅烧后，二次球磨并过筛得粉料；(3)将所得粉末加入聚乙烯醇(PVA，浓度为5wt％)，研磨混合均匀；(4)得到的粉料在500MPa压力和180℃条件下冷烧结处理，获得初步致密化的陶瓷生坯；(5)将所得的陶瓷生坯在不同温度下热处理。通过冷烧结处理后可以明显降低材料的烧结温度，从而细化陶瓷的晶粒尺寸，并改善复合陶瓷的性能。
Cold sintering auxiliary preparation method of bismuth ferrite-barium titanate/barium ferrite composite ceramic with excellent ferroelectric property
The invention relates to the technical field of multiferroic materials, in particular to a cold sintering auxiliary preparation method of bismuth ferrite-barium titanate/barium ferrite composite ceramic with excellent ferroelectric performance. The cold sintering auxiliary preparation method comprises the following steps: (1) proportioning according to a correct stoichiometric ratio, ball-milling, drying and sieving to obtain powder; (2) calcining the prepared powder at high temperature, performing secondary ball milling, and sieving to obtain powder; (3) adding the obtained powder into polyvinyl alcohol (PVA with the concentration of 5wt%), grinding and uniformly mixing; (4) carrying out cold sintering treatment on the obtained powder at the pressure of 500MPa and the temperature of 180 DEG C to obtain a preliminarily densified ceramic green body; and (5) carrying out heat treatment on the obtained ceramic green body at different temperatures. After cold sintering treatment, the sintering temperature of the material can be obviously reduced, so that the grain size of the ceramic is refined, and the performance of the composite ceramic is improved.
本发明涉及多铁材料技术领域，具体涉及一种具有优异铁电性能的铁酸铋‑钛酸钡/钡铁氧体复合陶瓷冷烧结辅助制备方法：(1)按照正确化学计量比配料，球磨烘干，过筛得粉料；(2)将制得的粉料在高温下煅烧后，二次球磨并过筛得粉料；(3)将所得粉末加入聚乙烯醇(PVA，浓度为5wt％)，研磨混合均匀；(4)得到的粉料在500MPa压力和180℃条件下冷烧结处理，获得初步致密化的陶瓷生坯；(5)将所得的陶瓷生坯在不同温度下热处理。通过冷烧结处理后可以明显降低材料的烧结温度，从而细化陶瓷的晶粒尺寸，并改善复合陶瓷的性能。
Cold sintering auxiliary preparation method of bismuth ferrite-barium titanate/barium ferrite composite ceramic with excellent ferroelectric property
一种具有优异铁电性能的铁酸铋-钛酸钡/钡铁氧体复合陶瓷冷烧结辅助制备方法
2023-10-20
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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