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(Bi,Nd)(Fe,Ti)O<sub>3</sub> 세라믹스와 박막의 상형성 거동
김경만,이희영,Kim, Kyung-Man,Lee, Hee-Young 한국전기전자재료학회 2010 전기전자재료학회논문지 Vol.23 No.12
Nd and Ti co-doped bismuth ferrite $(Bi_{1-x}Nd_x)(Fe_{1-y}Ti_y)O_3$ (x, y = 0, 0.05, 0.1, 0.2) ceramics and thin films were synthesized through the conventional mixed-oxide process and pulsed laser deposition (PLD), respectively. Nd and Ti co-doping effect was examined with emphasis on how these impurities affect phase formation behavior as there could be the improvement in leakage current problems often associated with multiferroic $BiFeO_3$ (BFO) thin films. The lattice constants of BFO ceramics decreased with Nd doping concentration up to 10mol%, while they further decreased with Nd and Ti co-doping to about 20%. BFO thin films obtained by the PLD process revealed random polycrystalline structure. Similar to bulk BFO ceramic, Nd and Ti co-doping effectively suppressed the formation of unwanted secondary phase and thus stabilized the perovskite phase in BFO thin films.
Typography 교육에 있어서 Typoillust의 활용방안
김경만(Kim Kyung Man) 한국일러스아트학회 1998 일러스트레이션학 연구 Vol.2 No.-
In education, various learning theories and systems have been developed to cause interest in education. This study as a experimental method is for educational capacity to be more extended. As a result, the typography education course by typo-illustration and was turned out great efficacies on educational interest and achievement even if some other educational motive were excepted. Especially, the education using typo-illustration method was effective both in learning visual aesthetic constructive principles and in opening eyes to new world of illustration as a symbolic meaning.