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저온 소결성이 우수한 Pb(Zr<sub>0.53</sub>Ti<sub>0.47</sub>)O<sub>3</sub> 계 압전 분말 제조
이용희,백인찬,석상일,Lee, Yonghui,Baek, In Chan,Seok, Sang Il 한국입자에어로졸학회 2008 Particle and Aerosol Research Vol.4 No.1
$Pb(Zr_{0.53}Ti_{0.47})O_3$ (PZT) was synthesized by a multiple wet dry process. Precipitates prepared from reaction between $ZrOCl_2{\cdot}8H_2O$ and $TiOCl_2$ and $NH_4OH$ in an aqueous solution was dried at $100^{\circ}C$, and calcined at $500^{\circ}C$ and $700^{\circ}C$. The mixture mixed with PbO and as-dried or calcined $Zr_{0.53}Ti_{0.47}O_4$ (ZT) powders was calcined again at 700 and $800^{\circ}C$. Well crystallized ZT and PZT were formed at even $700^{\circ}C$. PZT piezoelectric ceramics of more than 98.5% in a relative density was obtained by sintering at as low as $900^{\circ}C$.
FPGA에서 시간구동 최적화의 배치 · 배선에 관한 연구
김현호(Hyeonho Kim),이용희(Yonghui Lee),이천희(Cheonhee Yi) 한국정보과학회 2003 한국정보과학회 학술발표논문집 Vol.30 No.1B
We have developed an optimization algorithm based formulation for performing efficient time driven simultaneous place and route for FPGAs. Field programmable gate array(FPGAs) provide of drastically reducing the turn-around time for digital ICs, with a relatively small degradation in performance. For a variety of application specific integrated circuit application, where time-to-market is most critical and the performance requirement do not mandate a custom or semicustom approach. FPGAs are an increasingly popular alternative. This has prompted a substantial amount of specialized synthesis and layout research focused on maximizing density, minimizing delay, and minimizing design time.