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탄산암모늄 공침을 이용한 Ce0.8Gd0.2O1.9 분말의 합성 및 소결특성Preparation and Sintering Characteristics of Ce0.8Gd0.2O1.9 Powder by Ammonium Carbonate Co-precipitation
- Other Titles
- Preparation and Sintering Characteristics of Ce0.8Gd0.2O1.9 Powder by Ammonium Carbonate Co-precipitation
- Issue Date
- 2012
- Publisher
- 한국세라믹학회
- Keywords
- SOFC; GDC; Co-Precipitation; Ammonium carbonate; Sintering
- Citation
- 한국세라믹학회지, v.49, no.1, pp.118 - 123
- Journal Title
- 한국세라믹학회지
- Volume
- 49
- Number
- 1
- Start Page
- 118
- End Page
- 123
- ISSN
- 1229-7801
- Abstract
- GDC20(Ce0.8Gd0.2O1.9) powder was synthesized from Ce and Gd nitrate solutions using ammonium carbonate((NH4)2CO3) as a precipitant. Attrition-milling of the powder, which had been calcined at 700oC for 4 h, decreased an average particle size of 2.2 μm to 0.5 μm. The milled powder consisted of nano-sized spherical primary particles. Due to the excellent sinterability of the powder, sintering of the powder compacts for 4 h showed relative densities of 80% at 1000oC and 96.5% at 1200oC, respectively. Densification was found to almost complete at 1300oC, resulting in a dense and homogeneous microstructure with a relative density of 99.5%. The grains of ~0.2 μm in size at 1200oC grew to ~1 μm in size at 1300oC as a result of a rapid grain growth.
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Collections - Department of General Studies > Department of General Studies > 1. Journal Articles
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