JACerS 2010 Archives | The American Ceramic Society

JACerS 2010

Effect of Various Additives on the Oxidation Behavior of ZrB2-Based Ultra-High-Temperature Ceramics at 1800°C

By / January 28, 2010

Volume 93 Issue 2, Pages 345 – 349 Ping Hu, Xing-Hong Zhang, Jie-Cai Han, Xiao-Guang Luo, Shang-Yi DuPublished Online: Dec 3 2009 4:28PMDOI: 10.1111/j.1551-2916.2009.03420.x ABSTRACT The effect of various additives such as TiB2, HfB2, CrB2, TaB, TaSi2, LaB6, La2O3, and AlN on the oxidation behavior of ZrB2-based ultra-high-temperature ceramics (UHTCs) at 1800°C was investigated. The…

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In Situ study of Nucleation of Zirconia in an MgO–Al2O3–SiO2 Glass

By / January 28, 2010

Volume 93 Issue 2, Pages 342 – 344 Olivier Dargaud, Georges Calas, Laurent Cormier, Laurence Galoisy, Cécile Jousseaume, Gilles Querel, Matthew NewvillePublished Online: Dec 15 2009 8:07PMDOI: 10.1111/j.1551-2916.2009.03409.x ABSTRACT Crystalline nucleation is investigated during the dynamical heat treatment of a ZrO2-MgO-Al2O3-SiO2 glass by high-temperature Zr K-edge X-ray absorption near-edge spectroscopy. In the parent glass, the…

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Effect of Gamma-Ray Irradiation on the Optical Properties of PbO–B2O3–SiO2 and Bi2O3–B2O3–SiO2 Glasses

By / January 28, 2010

Volume 93 Issue 2, Pages 338 – 341 Yuwen Ou, Stefania Baccaro, Yaping Zhang, Yunxia Yang, Guorong ChenPublished Online: Dec 3 2009 4:25PMDOI: 10.1111/j.1551-2916.2009.03407.x ABSTRACT Irradiation treatments on glasses in both PbO-B2O3-SiO2 and Bi2O3-B2O3-SiO2 systems were carried out under the 60Co γ-ray radiation at a dose of 5.0 kGy. Ultraviolet and visible (UV-Vis) transmission spectra…

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Enhanced Quality Factor of Zinc Lanthanum Borates-Based Dielectrics via the Control of ZnO/B2O3 Ratio

By / January 28, 2010

Volume 93 Issue 2, Pages 334 – 337 Sae Han Na Doo, Yeon Hwa Jo, Joon Seok Lee, Bhaskar C. Mohanty, Koppole C. Sekhar, Yong Soo ChoPublished Online: Dec 3 2009 4:25PMDOI: 10.1111/j.1551-2916.2009.03411.x ABSTRACT A dielectric system having an exceptionally high-quality factor of 1350 at 16.8 GHz is reported as a strong candidate for glass-based…

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Mechanical Properties of Nanolaminate Ti3SnC2 Carbide Determined by Nanohardness Cartography

By / January 28, 2010

Volume 93 Issue 2, Pages 330 – 333 Christophe Tromas, Nadia Ouabadi, Véronique Gauthier-Brunet, Michel Jaouen, Sylvain DuboisPublished Online: Dec 8 2009 3:42PMDOI: 10.1111/j.1551-2916.2009.03412.x ABSTRACT Nanoindentation is used to measure hardness of Ti3SnC2, a recently synthesized nanolaminate carbide. Hardness cartography and optical microscopy are used to correlate hardness values and sample phases. An indentation size…

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The Emergence of Intergranular Precipitates in TiO2-Doped alpha-Al2O3 Ceramics

By / January 28, 2010

Volume 93 Issue 2, Pages 326 – 329 Pengxiang Qian, Hui Gu, Miaofang ChiPublished Online: Nov 23 2009 6:57PMDOI: 10.1111/j.1551-2916.2009.03410.x ABSTRACT The minor phase accumulated at intergranular regions in ceramics is usually associated with the global doping level of additives; however, such simplification often undermines the local variation in liquid composition that leads to the…

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Synthesis and Oxidation Behavior of MgAlON Prepared from Different Starting Materials

By / January 28, 2010

Volume 93 Issue 2, Pages 322 – 325 Guotian Ye, Junli Shang, Dongrui Zhang, Min Liang, Yaosheng ChenPublished Online: Dec 3 2009 4:25PMDOI: 10.1111/j.1551-2916.2009.03408.x ABSTRACT The formation and oxidation of magnesium-aluminum oxynitride (MgAlON) were investigated with emphasis on the effect of impurities through using synthetic raw materials and natural raw materials. It was observed that…

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Effects of Poling Process on KNN-Modified Piezoceramic Properties

By / January 28, 2010

Volume 93 Issue 2, Pages 318 – 321 F. Rubio-Marcos, Juan J. Romero, Diego A. Ochoa, Jose E. García, Rafael Perez, José F. FernandezPublished Online: Dec 3 2009 4:24PMDOI: 10.1111/j.1551-2916.2009.03404.x ABSTRACT The influence of the orthorhombic to tetragonal phase transition near room temperature in the poling process of KNN-modified piezoceramics was studied. Poling temperatures of…

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Formation and Stability of Ferroelectric BaTi2O5

By / January 27, 2010

Volume 93 Issue 1, Pages 295 – 300 Na Zhu, Anthony R. WestPublished Online: Nov 23 2009 6:56PM DOI: 10.1111/j.1551-2916.2009.03393.x ABSTRACT BaTi2O5 (BT2) is thermodynamically stable over a very narrow temperature range between 1220° and 1230°C: a modification to the BaO–TiO2 phase diagram is proposed. This thermodynamic stability was shown by constructing a time–temperature transformation…

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Biomimetic Preparation and Characterization of Bioactive Coatings on Alumina and Zirconia Ceramics

By / January 27, 2010

Volume 93 Issue 1, Pages 288 – 294 Irena Priboič, Sabina Beranič Klopčič, Tomaž KosmačPublished Online: Oct 29 2009 6:06PM DOI: 10.1111/j.1551-2916.2009.03397.x ABSTRACT For the preparation of bioactive coatings on alumina and zirconia ceramic surfaces a fast biomimetic method using a supersaturated solution containing Na+, Ca2+, Cl−, HCO3−, and PO43− ions was used. The coatings…

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