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Method for preparing bismuth ferrite-barium titanate piezoelectric textured ceramic by cold sintering technology
The invention discloses a method for preparing bismuth ferrite-barium titanate piezoelectric textured ceramic by using a cold sintering technology. The method comprises the following steps: synthesizing a BaTiO3 flaky template with a high radius-thickness ratio; calcining to prepare (1-x) BaFeO3-xBaTiO3 pre-sintered powder, and then carrying out ball milling on the pre-sintered powder to obtain ceramic matrix powder; the preparation method comprises the following steps: mixing ceramic matrix powder with a binder, a plasticizer, a defoaming agent, a dispersing agent, absolute ethyl alcohol and a sintering aid Ba (OH) 2. 8H2O, carrying out first-time ball milling, adding a BaTiO3 flaky template into mixed slurry, and carrying out second-time ball milling to obtain tape casting slurry; carrying out curtain coating on the curtain coating slurry to obtain a curtain coating film; cutting the cast film into round sheets, and then carrying out lamination and hot press molding to obtain a ceramic green body; carrying out glue removal on the ceramic green body, and then carrying out cold isostatic pressing; and carrying out cold sintering on the ceramic green body subjected to cold isostatic pressing to obtain the textured ceramic. The sintering temperature of the ceramic can be effectively reduced, and the texture degree and the piezoelectric property of the ceramic are improved.
本发明公开一种利用冷烧结技术制备铁酸铋‑钛酸钡压电织构陶瓷的方法，包括以下步骤：合成高径厚比的BaTiO3片状模板；煅烧制备(1‑x)BaFeO3‑xBaTiO3预烧粉，再将预烧粉球磨得到陶瓷基体粉；将陶瓷基体粉与粘结剂、增塑剂、除泡剂、分散剂、无水乙醇以及烧结助剂Ba(OH)2﹒8H2O混合，进行第一次球磨，再向混合浆料中加入BaTiO3片状模板，第二次球磨得到流延浆料；将流延浆料流延得到流延膜；将流延膜裁切为圆片，再进行叠层、热压成型得到陶瓷生坯；将陶瓷生坯进行排胶，然后冷等静压；将冷等静压后的陶瓷生坯进行冷烧结，得到织构陶瓷。本发明能有效降低陶瓷的烧结温度，提高陶瓷的织构度及压电性能。
Method for preparing bismuth ferrite-barium titanate piezoelectric textured ceramic by cold sintering technology
The invention discloses a method for preparing bismuth ferrite-barium titanate piezoelectric textured ceramic by using a cold sintering technology. The method comprises the following steps: synthesizing a BaTiO3 flaky template with a high radius-thickness ratio; calcining to prepare (1-x) BaFeO3-xBaTiO3 pre-sintered powder, and then carrying out ball milling on the pre-sintered powder to obtain ceramic matrix powder; the preparation method comprises the following steps: mixing ceramic matrix powder with a binder, a plasticizer, a defoaming agent, a dispersing agent, absolute ethyl alcohol and a sintering aid Ba (OH) 2. 8H2O, carrying out first-time ball milling, adding a BaTiO3 flaky template into mixed slurry, and carrying out second-time ball milling to obtain tape casting slurry; carrying out curtain coating on the curtain coating slurry to obtain a curtain coating film; cutting the cast film into round sheets, and then carrying out lamination and hot press molding to obtain a ceramic green body; carrying out glue removal on the ceramic green body, and then carrying out cold isostatic pressing; and carrying out cold sintering on the ceramic green body subjected to cold isostatic pressing to obtain the textured ceramic. The sintering temperature of the ceramic can be effectively reduced, and the texture degree and the piezoelectric property of the ceramic are improved.
本发明公开一种利用冷烧结技术制备铁酸铋‑钛酸钡压电织构陶瓷的方法，包括以下步骤：合成高径厚比的BaTiO3片状模板；煅烧制备(1‑x)BaFeO3‑xBaTiO3预烧粉，再将预烧粉球磨得到陶瓷基体粉；将陶瓷基体粉与粘结剂、增塑剂、除泡剂、分散剂、无水乙醇以及烧结助剂Ba(OH)2﹒8H2O混合，进行第一次球磨，再向混合浆料中加入BaTiO3片状模板，第二次球磨得到流延浆料；将流延浆料流延得到流延膜；将流延膜裁切为圆片，再进行叠层、热压成型得到陶瓷生坯；将陶瓷生坯进行排胶，然后冷等静压；将冷等静压后的陶瓷生坯进行冷烧结，得到织构陶瓷。本发明能有效降低陶瓷的烧结温度，提高陶瓷的织构度及压电性能。
Method for preparing bismuth ferrite-barium titanate piezoelectric textured ceramic by cold sintering technology
利用冷烧结技术制备铁酸铋-钛酸钡压电织构陶瓷的方法
ZHANG HAIBO (author) / WU TIANQIONG (author) / FAN PENGYUAN (author) / TAN HUA (author) / MA WEIGANG (author) / LIU KAI (author) / XIAO JIANZHONG (author) / GUO XIN (author)
2023-03-07
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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