| 학회 | 한국재료학회 |
| 학술대회 | 2015년 가을 (11/25 ~ 11/27, 부산 해운대그랜드호텔) |
| 권호 | 21권 2호 |
| 발표분야 | F. 광기능/디스플레이 재료 |
| 제목 | Synthesis of ZrO2 Nanoparticles with high refractive index by a Salt-Assisted Ultrasonic Spray Pyrolysis |
| 초록 | The refractive index (RI) is one of the most important properties for various optoelectronic devices such as flat panel displays, touch panels, solar cell, and so on. In recent years, the need for optical materials with high or proper RI is increasing to lower the electric consumption and enhance the brightness of the devices. Although inorganic materials usually have a high RI in the range of 2.0 ~ 5.0, they have many disadvantages such a high density and low flexibility. Organic materials have the advantages of low weight, excellent impact resistance, and good flexibility compared with inorganic materials. Therefore, organic-inorganic hybrid materials (i.e., introducing metal oxide nanoparticles to polymer matrix) are regarded as a useful and effective approach to simultaneously achieve the high or proper RI and other required characteristics for the optoelectronic devices. The most frequently employed inorganic materials for high RI nanocomposites are ZrO2, ZnS, TiO2, CeO2 and ZnO nanoparticles. Among them, ZrO2 nanoparticles are considered as the most stable RI booster for polymer because of their high RI (n = 2.2 at 589 nm) and less photocatalytic properties. The solution based methods such as a reverse micro emulsion, citrate process, and sol–gel combustion can be used to obtain nanoscale ZrO2 particles. However complicated steps must be accomplished and the unnecessary grain growth and necking between particles usually occur during a calcination step for improving a crystallinity. In this study, ZrO2 nanoparticles are synthesized using a salt-assisted ultrasonic spray pyrolysis method which is able to achieve the fine nanoparticles with a non-agglomeration and dispersibility as well as a high crystallinity. In addition, the optical properties of the nanoparticles were also investigated and discussed in terms of their size, morphology and crystallinity. |
| 저자 | Young-In Lee1, Sung-Jin Moon2, Kyu-Dam Lim1, Young Hwangbo2 |
| 소속 | 1Department of Materials Science and Engineering, 2Seoul National Univ. of Science and Technology |
| 키워드 | <P>Zirconia; Nanoparticle; Refractive index; Ultrasonic; Pyrolysis</P> |
