| 학회 |
한국재료학회 |
| 학술대회 |
2016년 봄 (05/18 ~ 05/20, 여수 디오션리조트 ) |
| 권호 |
22권 1호 |
| 발표분야 |
G. 나노/박막 재료 분과 |
| 제목 |
Synthesis and characterization of α-alumina based conductive pearlescent pigment |
| 초록 |
Antistatic coatings are being applied for avoiding static charge build up and consequent static discharge problems. Conductive fillers like metal powders and carbon based materials have been used as a conductivity imparting agents in the antistatic coatings. However, the low dispersability and low chemical stability of metals and the dull appearance of carbonaceous materials have limited their application. Composites conductive pigment obtained by depositing very thin layer (few nanometer scale) conductive oxides, like Antimony doped tin oxide (ATO), on ceramic and mineral substrates are being considered as a remedy for the mentioned problems of metals and carbonaceous materials. If the conductive coating is done on the pearlescent pigment, it is possible to get multi-functional pigment having very attractive pearl like luster with good electrical conductivity. Mica is the commonly used substrate for pearlescent pigments but, as mica is mainly from mineral origin its inherent impurity problem usually creates heterogeneous nucleation during TiO2 deposition and thus non uniform coating which affects the optical quality. Besides, for outdoor application the pigment mechanical strength is as equally important as optical and electrical property of the pigment. In this respect using Alumina instead of titania as a substrate for the conductive pearlescent pigment will be of great benefit. In this study we synthesized high aspect ratio α-alumina platelets to be used as a substrate for the conductive pearlescent pigment and very thin double layer of TiO2 and ATO, one on top of the other, has been deposited on its entire surface. The optical property (the brightness and luster) and the electrical property (powder resistivity) of the resulting pigment has been analyzed. |
| 저자 |
Anteneh Marelign Beyene1, Hyun Min Lee2, Do Kyung Kim3
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| 소속 |
1Korea Advanced Institute of Science and Technology (KAIST), 2291 Daehak-ro, 3Yuseong-gu |
| 키워드 |
pearlescent pigment; α-alumina
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| E-Mail |
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