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水基流延制備BaTiO_3基PTC片的研究
陳勇;龔樹萍;黎慧;王法軍;余石金;徐玲芳
通過水基流延制備BaTiO3基PTC片,陶瓷粉體采用固相合成預燒BaTiO3基PTC粉體,平均粒徑為1.0μm,粘合劑采用濃度為12%的PVA溶液和B-1070乳液,分散劑采用D-3019(Rohm-Hass),增塑劑分別采用化學純的丙三醇、鄰苯二甲酸二丁脂和聚乙二醇PEG400,消泡劑采用化學純的正辛醇,溶劑為水。主要討論了分散劑的用量和粘度的關系、漿料的固相含量和粘度的關系、不同粘合劑漿料的流變行為、不同粘合劑的熱失重特性等,發現采用PAA乳液粘合劑無論是在固含量、粘度以及燒成後電性能都優於PVA粘合劑,因此更適合於BaTiO3水基流延,當分散劑用量為粉體0.50%(質量分數)時,漿可以獲得固相含量高達86.0%左右粘度僅為490mPa.s的BaTiO3陶瓷漿料。
作者單位：華中科技大學電子科學與技術系;華中科技大學電子科學與技術系;華中科技大學電子科學與技術系;華中科技大學電子科學與技術系;華中科技大學電子科學與技術系;湖北大學物理學與電子技術學院暨鐵電壓電材料與器件湖北省重點實驗室 湖北武漢430074;湖北大學物理學與電子技術學院暨鐵電壓電材料與器件湖北省重點實驗室;湖北武漢430062;湖北武漢430074;湖北武漢430074;湖北武漢430074;湖北武漢430074;湖北武漢430062
關鍵詞：水基流延;PTC;BaTiO3
基金：國家高技術研究發展計劃(863計劃)資助項目(2001AA325040);湖北省重點實驗室開放基金資助項目(2007TY10)
分類號：TM28
DOI：CNKI:SUN:GNCL.0.2007-12-018
正文快照：
1引言流延成型(tape casting)是壹種較古老的工藝成型方法,最早用於造紙、塑料和油漆工業。自從由GennN.Howatt提出後應用於陶瓷成型領域,並於1952年獲得專利[1,2],目前已成為壹種制備大面積、超薄陶瓷基片的重要方法,所制備的陶瓷生膜廣泛用於MLCC電容器、混合電路基片、微芯
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The research of BaTiO_3-based PTC films gotten by aqueous tape casting
CHEN Yong1;2;GONG Shu-ping1;LI Hui1;WANG Fa-jun1;YU Shi-jin1;XU Ling-fang2(1.Department of Electronic Science &Technology;Huazhong University of Science &Technology;Wuhan 430074;China;2.School of Physics and Electronic Technology;Key Laboratory of Ferroelectric and Piezoelectric Materials and Devices of Hubei Province;Hubei University;Wuhan 430062;China)
The BaTiO3-based PTC films were gotten by aqueous tape casting,ceramic powders using solid-phase synthesis of presintered BaTiO3-based PTC powder,the average particle size was 1.0μm.The concentration of 12% PVA solution and B-1070 emulsion were used for adhesives,using D-3019(rohm-hass) as dispersant.The use of chemical plasticizer were pure glycerin,phthalate small lipid and polyethylene glycol PEG400,the use of defoamer was chemical-octyl alcohol,the use of solvents was water.Discussed the amount of dispersant viscosity and the relationship between the size of the solid phase content and viscosity of the relationship between the different binder slurry rheological behavior,different adhesive weight loss properties showed that the application PAA emulsion adhesive whether in the solid content,viscosity and firing electrical properties were better than after the PVA adhesive,it was more suited to BaTiO3 aqueous tape cast,when the amount of powder dispersing agent quality scored 0.50%,the pulp could be solid-phase high content the viscosity of 86.0% around only 490mPa·s of BaTiO3 ceramic slurry.
Keyword：aqueous tape castion;PTC;BaTiO3