ACT Archives | The American Ceramic Society

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Effects of Sulfur and a Lubricity Improver on the Tribological Characteristics of Si3N4 Ceramics against Steel in Fuel

By / January 28, 2010

Volume 6 Issue 5, Pages 642 – 650 Satoshi Kitaoka, Kazumi Kashiwagi, Masashi Wada, Takenobu SakaiPublished Online: Nov 5 2008 3:06PM DOI: 10.1111/j.1744-7402.2008.02306.x ABSTRACT The effects of sulfur (dibenzothiophene) and a lubricity improver (glyceride) on the tribological behavior of combinations of Si3N4 ceramics and steel were investigated in kerosene at 373 K. The tests were performed…

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Structure and Bioactivity of Zirconia Nanotube Arrays Fabricated by Anodization

By / January 28, 2010

Volume 6 Issue 5, Pages 636 – 641 Limin Guo, Jianling Zhao, Xixin Wang, Xuewen Xu, Heye Liu, Yangxian LiPublished Online: Oct 29 2008 1:09PM DOI: 10.1111/j.1744-7402.2008.02305.x ABSTRACT Zirconia nanotube arrays with a diameter of 300–350 nm and a length of 100 μm were prepared by anodization of zirconium in an organic electrolyte containing NH4F. The zirconia…

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PhysicoChemical Characterization of Strontium- and Cobalt-Doped Lanthanum Chromite Powders Produced by Combustion Synthesis

By / January 28, 2010

Volume 6 Issue 5, Pages 626 – 635 Luiz F. G. Setz, Sonia R. H. Mello-Castanho, Rodrigo Moreno, María T. ColomerPublished Online: Oct 29 2008 1:04PM DOI: 10.1111/j.1744-7402.2008.02302.x ABSTRACT Doped lanthanum chromites are investigated as ceramic interconnect materials to be used in high-temperature solid oxide fuel cells (SOFCs). In this work, a La0.80Sr0.20Cr0.92Co0.08O3 powder was…

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Effects of Preheat-Treated Aluminosilicate Addition on the Phase Development, Microstructure, and Mechanical Properties of Mullitized Porous OBSC Ceramics

By / January 28, 2010

Datum Shifeng Liu, Yu-Ping Zeng, Dongliang Jiang, Shifeng LiuPublished Online: Oct 29 2008 1:03PM DOI: 10.1111/j.1744-7402.2008.02300.x ABSTRACT Mullitized porous oxidation-bonded SiC (OBSC) ceramics were fabricated with and without preheat-treated aluminosilicate by an in situ reaction-bonding process. The effects of the preheat-treated aluminosilicate on the phase development, microstructure, and mechanical properties of porous SiC ceramics were…

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The Study on Carbon Nanofiber (CNF)-Dispersed B4C Composites

By / January 28, 2010

Volume 6 Issue 5, Pages 607 – 616 Ken Hirota, Yoshihiro Nakayama, Masaki Kato, Shingo Nakane, Toshiyuki NishimuraPublished Online: Nov 5 2008 3:16PM DOI: 10.1111/j.1744-7402.2008.02323.x ABSTRACT Carbon nanofiber (CNF)-dispersed B4C composites have been synthesized and consolidated directly from mixtures of elemental raw powders by pulsed electric current pressure sintering (1800°C/10 min/30 MPa). A 15 vol% CNF/B4C composite…

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Ceramic Laminates by Gelcasting

By / January 28, 2010

Volume 6 Issue 5, Pages 593 – 606 Noah O. Shanti, David B. Hovis, Michelle E. Seitz, John K. Montgomery, Donald M. Baskin, Katherine T. FaberPublished Online: Nov 5 2008 3:11PM DOI: 10.1111/j.1744-7402.2008.02312.x ABSTRACT Laminated ceramic composites are appealing for many applications due to their unique and customizable thermal and mechanical properties. Gelcasting is a…

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Microwave Dielectric Properties and Chemical Resistance of Low-Temperature-Sintered CaZrB2O6 Ceramics

By / January 28, 2010

Volume 6 Issue 5, Pages 587 – 592 Hyo Tae Kim, Myoung-Hwa Nam, Jong-Hee Kim, Sahn NahmPublished Online: Apr 7 2009 4:32PM DOI: 10.1111/j.1744-7402.2009.02381.x ABSTRACT Dolomite-type borate ceramics consisting of CaZrB2O6 were synthesized via a conventional solid-state reaction route; low-temperature sintering was explored using Bi2O3–CuO additives of 1–7 wt% for low-temperature co-fired ceramics applications. For several…

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Effect of Bi2O3 Addition on the Sintering Temperature and Microwave Dielectric Properties of Zn2SiO4 Ceramics

By / January 28, 2010

Volume 6 Issue 5, Pages 581 – 586 Jin-Seong Kim, Ngoc-Huan Nguyen, Myung-Eun Song, Jong-Bong Lim, Dong-Soo Paik, Sahn Nahm, Jong-Hoo Paik, Byung-Hyun Choi, Soon-Jae YuPublished Online: Dec 11 2008 11:50AM DOI: 10.1111/j.1744-7402.2008.02335.x ABSTRACT Bi2O3 was added to a nominal composition of Zn1.8SiO3.8 (ZS) ceramics to decrease their sintering temperature. When the Bi2O3 content was…

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The Effect of Dopants on the Dielectric Properties of Ba(B’1/2Ta1/2)O3 (B’=La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Y, Yb, and In) Microwave Ceramics

By / January 28, 2010

Datum Lamrat Abdul Khalam, Prabhakaran Sreekumari Anjana, Mailadil Thomas SebastianPublished Online: Nov 5 2008 3:07PM DOI: 10.1111/j.1744-7402.2008.02307.x ABSTRACT Low-loss dielectric ceramics based on Ba(B’1/2Ta1/2)O3 (B’=La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Y, Yb, and In) complex perovskites have been prepared by the solid-state ceramic route. The dielectric properties (ɛr, Qu, and τf) of…

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A Novel Temperature-Compensated Microwave Dielectric (1−x)(Mg0.95Ni0.05)TiO3−xCa0.6La0.8/3TiO3 Ceramics System

By / January 28, 2010

Volume 6 Issue 5, Pages 562 – 570 Chun-Hsu Shen, Cheng-Liang Huang, Chuan-Feng Shih, Chih-Ming HuangPublished Online: Nov 19 2008 12:55PM DOI: 10.1111/j.1744-7402.2008.02326.x ABSTRACT The microstructure and microwave dielectric properties of a (1−x)(Mg0.95Ni0.05)TiO3−xCa0.6La0.8/3TiO3 ceramics system have been investigated. The system was prepared using a conventional solid-state ceramic route. In order to produce a temperature-stable material,…

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