This study examines the role of the nano- and micro-particle ratio in dispersion stability and mechanical properties of composite resins for SLA(stereolithography) 3D printing technology. VTES(vinyltriethoxysilane)-coated ZrO2 ceramic particles with different nano- and micro-particle ratios are prepared by a hydrolysis and condensation reaction and then dispersed in commercial photopolymer (High-temp) based on interpenetrating networks(IPNs). The coating characteristics of VTES-coated ZrO2 particles are observed by FE-TEM and FT-IR. The rheological properties of VTEScoated ZrO2/High-temp composite solution with different particle ratios are investigated by rheometer, and the dispersion properties of the composite solution are confirmed by relaxation NMR and Turbiscan. The mechanical properties of 3Dprinted objects are measured by a tensile test and nanoindenter. To investigate the aggregation and dispersion properties of VTES-coated ZrO2 ceramic particles with different particle ratios, we observe the cross-sectional images of 3D printed objects using FE-SEM. The 3D printed objects of the composite solution with nano-particles of 80 % demonstrate improved mechanical characteristics.

Abstracts
 1. 서 론
 2. 실험 방법
  2.1 재료
  2.2 ZrO2 합성 분말 제조 및 복합 수지 제조
  2.3 VTES로 코팅된 ZrO2/High-temp 복합수지의특성 평가
 3. 결과 및 고찰
  3.1 VTES로 코팅 된 ZrO2 입자의 표면 특성 분석
  3.2 다른 입도 비율을 갖는 VTES-coated ZrO2/High-temp 복합 수지 용액의 특성 분석
  3.3 다른 입도 비율을 갖는 VTES-coated ZrO2/High-temp 복합 수지 용액을 이용한 3D프린팅 된 출력물의 기계적 특성 분석
  3.4 다른 입도 비율을 갖는 VTES-coated ZrO2/High-temp 복합 수지 용액을 이용한 3D 프린팅 된출력물의 단면 분석
 4. 결 론
 References

• 송세연(한국세라믹기술원 에너지저장소재센터) | Se Yeon Song (Energy Storage Materials Division, Korea Institute of Ceramic Engineering and Technology)
• 박민수(서울과학기술대학교 기계시스템디자인공학과) | Min Soo Park (Department of Mechanical System and Design Engineering, Seoul National University of Science and Technology)
• 윤지선(한국세라믹기술원 에너지저장소재센터) | Ji Sun Yun (Energy Storage Materials Division, Korea Institute of Ceramic Engineering and Technology) Corresponding author