有机载体对铁酸锶镧薄膜形貌和性能的影响
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摘要
采用丝网印刷法在氧化铝基底上制备了La0.6Sr0.4FeO3薄膜。利用扫描电镜、流变仪、X射线衍射仪、红外光谱仪、四探针和划痕仪研究了有机载体配比对薄膜成膜效果、浆料粘度、电阻均匀性和与基底结合强度等的影响。结果表明,松油醇和乙基纤维素(EC)的配比对浆料成膜效果影响显著,加入60%松油醇时,薄膜较为平整,但裂纹较多。当加入乙基纤维素(EC)2%~3%时,浆料粘度提高为0.23 Pa·s和0.55 Pa·s,最有利于薄膜印刷,且膜裂纹少,膜层均匀连续;烧结后的薄膜为单一的钙钛矿相,且Fe-O键比粉体的结合强;并且薄膜方阻均匀,与基底的结合力强。因此松油醇含量60%、EC加入量2%~3%的铁酸锶镧浆料最适于丝网印刷成膜。
La0. 6Sr0. 4FeO3 thin films were prepared on the alumina substrate by screen printing method. SEM,X-ray diffraction,infrared spectrometer,rheometer,four point probe and scratch tester were used to characterize the film-formation results,slurry viscosity,resistance uniformity and banding strength. The results showed that the ratio of terpineol to ethyl cellulose(EC) had a significant effect on the film-forming. When adding 60% terpineol,the films were smooth with cracks. When adding2% ~ 3% EC,the viscosity of the slurry increased to 0. 23 and 0. 55 Pa·s,which were the best organic carrier composition. After sintering the film was single perovskite phase,and the strength of Fe-O band was bigger than the powder,which had the most uniform sheet resistance and the strongest banding strength to substrate. Therefore,60% terpineol and 2% ~ 3% EC content is most suitable for screen printing La0. 6Sr0. 4FeO3 film.
La0. 6Sr0. 4FeO3 thin films were prepared on the alumina substrate by screen printing method. SEM,X-ray diffraction,infrared spectrometer,rheometer,four point probe and scratch tester were used to characterize the film-formation results,slurry viscosity,resistance uniformity and banding strength. The results showed that the ratio of terpineol to ethyl cellulose(EC) had a significant effect on the film-forming. When adding 60% terpineol,the films were smooth with cracks. When adding2% ~ 3% EC,the viscosity of the slurry increased to 0. 23 and 0. 55 Pa·s,which were the best organic carrier composition. After sintering the film was single perovskite phase,and the strength of Fe-O band was bigger than the powder,which had the most uniform sheet resistance and the strongest banding strength to substrate. Therefore,60% terpineol and 2% ~ 3% EC content is most suitable for screen printing La0. 6Sr0. 4FeO3 film.
引文
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[19]赵倩,丁铁柱,朱志强,等.钙钛矿型氧化物La1-x SrxFe O3-δ的成相过程和结构[J].稀土,2006,27(5):44-47.
[20]陈永红,魏亦军,刘杏芹,等.La1-xSrxFe O3-δ系钙钛矿材料的表征和性能[J].无机化学学报,2006,22(1):31-36.
[2]Zhao Shanqi,Johnny K O Sin,Xu Baokun,et al.A high performance ethanol sensor based on field-effect transistor using a La Fe O3nano-crystalline thin-film as a gate electrode[J].Sensors and Actuators B:Chemical,2000,64(1):83-87.
[3]Song Peng,Wang Qi,Zhang Zhe,et al.Synthesis and gas sensing properties of biomorphic La Fe O3hollow fibers template from cotton[J].Sensors and Actuators B:Chemical,2010,147(1):248-254.
[4]赵海涛,左继成,刘瑞萍,等.溶胶-凝胶自燃烧法制备镧取代锶铁氧体[J].稀土,2014,03:40-44.
[5]Toan N N,Saukko S,Lantto V.Gas sensing with semiconducting perovskite oxide La Fe O3[J].Phys B:Condensed Matter,2003,327(2-4):279-282.
[6]Li Shudan,Jing Liqiang,Fu Wei,et al.Photoinduced charge property of nanosized perovskite-type La Fe O3and its relationships with photocatalytic activity under visible irradiation[J].Materials Research Bulletin,2007,42(2):203-212.
[7]钱方兵,王丽,沈建宇,等.纳米钙钛矿型ABOx(A=La、Y;B=Mn、Co、Ni)的制备、表征及其对NO+CO的催化活性[J].稀土,2014,03:87-93.
[8]Chu Xiangfeng,Zhou Sumei,Zhang Wangbing,et al.Trimethylamine sensing properties of nano-La Fe O3prepared using solid-state reaction in the presence of PEG400[J].Materials Science and Engineering:B,Solid-state Materials for Advanced Technology 2009,164(1):65-69.
[9]燕克兰,付兴华,崔永涛,等.铁酸镧薄膜的研究进展[J].稀土,2011,32(2):64-70.
[10]Evdou A,Zaspalis V,Nalbandian.LaxSr1-xFe O3-δperovskites as redox materials for application in a membrane reactor for simultaneous production of pure hydrogen and synthesis gas[J].Fuel,2010,89(6):1265-1273.
[11]金克新,赵省贵,谭兴毅,等.La0.3Sr0.7Fe O3薄膜的输运和光诱导特性研究[J].稀有金属材料与工程,2010,01:76-79.
[12]Li J Q,Xiao P.Fabrication and characterization of La0.8Sr0.2Mn O3/metal interface for application in SOFCs[J].Journal of the European Ceramic Society,2001,21(5):659-668.
[13]唐高峰.LSCO厚膜电阻浆料的研究[D].成都:电子科技大学,2012.
[14]安雷,张玢,郜建全,等.固体氧化物燃料电池La0.7Sr0.3Cr0.5Mn0.5O3-δ-SDC复合阳极性能研究[J].稀土,2013,34(3):7-12.
[15]朱新德,李胜利,刘汉洲,等.浆料组成对锰酸锶镧薄膜微结构和性能的影响[J].硅酸盐学报,2009,08:1344-1350.
[16]Cui X,Li S,Zhu X.Microstructure and electrical properties of La1-xSrxFe O3(x=0~0.6)film by a screenprinting method[J].Materials Letters,2014,130:267-270.
[17]周春红.丝网印刷用纳米Zn O气敏浆料制备研究[D].武汉:华中科技大学,2009.
[18]Guo J,Lewis J A.Aggregation effects on compressive flow properties and drying behavior of colloidal silica suspensions[J].J Am Ceram Soc,1999,82(9):23452-2358.
[19]赵倩,丁铁柱,朱志强,等.钙钛矿型氧化物La1-x SrxFe O3-δ的成相过程和结构[J].稀土,2006,27(5):44-47.
[20]陈永红,魏亦军,刘杏芹,等.La1-xSrxFe O3-δ系钙钛矿材料的表征和性能[J].无机化学学报,2006,22(1):31-36.