• Proceedings of the Korean Ceranic Society Conference
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• 2000.04a
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• pp.73.2-73.2
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• 2000

• Proceedings of the KWS Conference
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• 1997.10a
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• pp.33-35
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• 1997

• Proceedings of the Korean Powder Metallurgy Institute Conference
• /
• 2006.04a
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• pp.53-53
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• 2006

• Proceedings of the Korean Powder Metallurgy Institute Conference
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• 2006.09b
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• pp.921.1-921.1
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• 2006

• Proceedings of the Korean Powder Metallurgy Institute Conference
• /
• 2003.10a
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• pp.71-72
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• 2003

• Proceedings of the Korean Powder Metallurgy Institute Conference
• /
• 2003.10a
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• pp.123-124
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• 2003

• Proceedings of the Korean Powder Metallurgy Institute Conference
• /
• 2003.10a
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• pp.125-125
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• 2003

• Proceedings of the Korean Powder Metallurgy Institute Conference
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• 2003.10a
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• pp.91-91
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• 2003

• Journal of Powder Materials
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• v.16 no.4
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• pp.268-274
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• 2009

For the purpose of obtaining basic information on the development of lead-free materials, a high density composites (a) W-Cu, (b) W-Sn (c)W-Cu-Sn and (d) W-Cu-Ni were fabricated by the P/M method. The particle size of used metal powders were under 325 mesh, inner size of compaction mould was $\phi8$ mm, and compaction pressure was 400 MPa. A High density composite samples were sintered at a temperature between $140^{\circ}C$ and $1050^{\circ}C$ for 1 hour under Ar atmosphere. The microstructure, phase transformation and physical properties of the sintered samples were investigated. As the results, the highest relative density of 95.86% (10.87 g/$cm^3$) was obtained particularly in the sintered W-Cu-Sn ternary system sample sintered at 450 for 1hr. And, Rockwell hardness (HRB) of 70.0 was obtained in this system.

• Journal of Powder Materials
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• v.19 no.5
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• pp.362-366
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• 2012

We report the effect of the chain length of carboxylic acid on the photoluminescence(PL) of $CuInS_2$/ZnS nanocrystals. $CuInS_2$/ZnS nanocrystals with emission wavelength ranging from 566 nm through 583 nm were synthesized with zinc acetate and carboxylic acids with various chain length. In this study, $CuInS_2$/ZnS nanocrystals prepared using long chain carboxylic acid showed more improved PL intensity. The origin of strong photoluminescence of the nanocrystals prepared with zinc acetate and long chain carboxylic acid was ascribed to improved size distribution due to strong reactivity between long chain carboxylic acid and zinc acetate.