Dispersion stability and anti-oxidation of an aqueous Zirconium Diboride slurry with a high solid loading
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- SON Joo-Hee
- Division of Materials Science Engineering, Hanyang University
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- JUNG Se-Hyuk
- Division of Materials Science Engineering, Hanyang University
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- CHOI Sung-Churl
- Division of Materials Science Engineering, Hanyang University
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In this paper, the dispersion stability of zirconium diboride (ZrB2) slurries and their anti-oxidation behavior to prevent re-oxidation in the ZrB2 slurries were studied.<BR>SPEX-milled ZrB2 powder was used to improve the dispersion stability, and the viscosity and zeta potential as a function of pH were measured in order to confirm the dispersion behavior in aqueous ZrB2 slurries using various additives [polyethylenimine (PEI), polyacrylicacid (PAA), polyvinyl pyrrolidone (PVP), and polyvinyl alcohol (PVA)]. In addition, the oxygen contents were measured before and after processing to evaluate the oxidation behavior in the ZrB2 slurries.<BR>By using 2 wt % PEI, the isoelectric point (IEP) of the ZrB2 slurry increased from a pH of 5.8 to above a pH of 12. Also, the viscosity was below 6.27 mPa·s in the 20 vol % ZrB2 slurry at pH values of 2–12. The oxygen content of the ZrB2 powders increased from 2.42 to 3.79 wt % after preparing an aqueous slurry, but by using 2 wt % PVP and 2 wt % PEI, the oxygen contents of the 20 vol % ZrB2 slurry could be reduced from 3.79 to 2.6 and 2.8 wt %, respectively. Consequently, a 50 vol % ZrB2 slurry with an oxygen content was 2.92 wt % could be prepared in the pH range of 6–9 using 2 wt % PEI.
収録刊行物
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- Journal of the Ceramic Society of Japan
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Journal of the Ceramic Society of Japan 121 (1410), 182-186, 2013
公益社団法人 日本セラミックス協会
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詳細情報 詳細情報について
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- CRID
- 1390282680264694144
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- NII論文ID
- 130004950811
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- NII書誌ID
- AA12229489
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- ISSN
- 13486535
- 18820743
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- NDL書誌ID
- 024223523
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 使用不可