Dispersion Property of Al2O3 Nanosol Prepared by Various Dispersion Factors and Silane Modification under Non-Aqueous Solvent

Ho Seong Na; Min-Gyeong Park; Hyung Mi Lim; Dae Sung Kim

doi:10.3740/MRSK.2016.26.12.733

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2016 Vol.26, Issue 12 Preview Page Next Page

Dispersion Property of Al₂O₃ Nanosol Prepared by Various Dispersion Factors and Silane Modification under Non-Aqueous Solvent 비수계 용매하에서 다양한 분산인자 및 실란 표면개질에 의해 제조된 Al₂O₃ 나노졸의 분산 특성

December 2016. pp. 733-740

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Abstract

Al₂O₃ nanosol dispersed under ethanol or N-Methyl-2-pyrrolidone(NMP) was studied and optimized with various dispersion factors and by utilizing the silane modification method. The two kinds of Al₂O₃ powders used were prepared by thermal decomposition method from aluminum ammonium sulfate(AlNH₄(SO₄)₂) while controlling the calcination temperature. Al₂O₃ sol was prepared under ethanol solvent by using a batch-type bead mill. The dispersion properties of the Al₂O₃ sol have a close relationship to the dispersion factors such as the pH, the amount of acid additive(nitric acid, acetic acid), the milling time, and the size and combination of zirconia beads. Especially, Al₂O₃ sol added 4 wt% acetic acid was found to maintain the dispersion stability while its solid concentration increased to 15 wt%, this stability maintenance was the result of the electrostatic and steric repulsion of acetic acid molecules adsorbed on the surface of the Al₂O₃ particles. In order to observe the dispersion property of Al₂O₃ sol under NMP solvent, Al₂O₃ sol dispersed under ethanol solvent was modified and solventexchanged with N-Phenyl-(3-aminopropyl)trimethoxy silane(APTMS) through a binary solvent system. Characterization of the Al₂O₃ powder and the nanosol was observed by XRD, SEM, ICP, FT-IR, TGA, Particles size analysis, etc.

Keywords

aluminum ammonium sulfate

Al₂O₃ sol

bead mill

wet process

dispersion stability

silane surface modification

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Information

Publisher :Materials Research Society of Korea
Publisher(Ko) :한국재료학회
Journal Title :Korean Journal of Materials Research
Journal Title(Ko) :한국재료학회지
Volume : 26
No :12
Pages :733-740
Received Date : 2016-11-04
Revised Date : 2016-11-04
Accepted Date : 2016-11-14
DOI :https://doi.org/10.3740/MRSK.2016.26.12.733

Korean Journal of Materials Research ISSN:1225-0562(Print) 2287-7258(Online) 한국재료학회지

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