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Nanoreactor Engineering and Spark Plasma Sintering of Gd20Ce80O1.90 Nanopowders

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The concept of the in situ engineering of nanoreactors – morphologically homogeneous aggregates of synthesized complex intermediate metastable products has been realized. The nanoblast calcination technique was applied and the final composition was synthesized within the preliminary localized volumes of each single nanoreactor. Such technique provided the heredity of the final structure of nanosize product, and allowed the prevention of the uncontrolled agglomeration and production of Gd20Ce80O1.90 powder consisting of ∼50 nm nano-aggregates of ∼7 nm crystallites with a remarkably homogeneous composition and uniform morphology. Finally, the SPS consolidation of nanosized aggregates of Gd20Ce80O1.90 was analyzed. The CGO nanoceramics with average grain sizes of 32 nm and 16 nm were obtained by low-temperature SPS at 1050 °C and 970 °C, respectively under the pressures of 90–150 MPa.
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Keywords: CGO; NANOBLAST SYNTHESIS; NANOPOWDER; NANOREACTOR; NANOSTRUCTURED CERAMIC; POWDER CHEMICAL SYNTHESIS; SPS

Document Type: Research Article

Publication date: 2008-06-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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