Journal of the American Ceramic Society

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Dependence of Apatite Formation on Silica Gel on Its Structure: Effect of Heat Treatment
Journal of the American Ceramic Society - Tập 78 Số 7 - Trang 1769-1774 - 1995
Sung‐Baek Cho, Kazuki Nakanishi, Tadashi Kokubo, Naohiro Soga, Chikara Ohtsuki, Takashi Nakamura, Toshiaki Kitsugi, Takao Yamamuro
The prerequisite for glasses and glass‐ceramics to bond to living bone is the formation of biologically active bonelike apatite on their surfaces in the body. Our previous study showed that a silica gel prepared by hydrolysis and polycon‐ densation of tetraethoxysilane in aqueous solution containing poly(ethy1ene glycol) induces apatite nucleation on its surface in a simulated ...... hiện toàn bộ
Microstructural Characterization of Commercial Hot‐Pressed Boron Carbide Ceramics
Journal of the American Ceramic Society - Tập 88 Số 7 - Trang 1935-1942 - 2005
Mingwei Chen, James W. McCauley, Jerry C. LaSalvia, Kevin J. Hemker
Two commercial hot‐pressed boron carbide ceramics were investigated by transmission electron microscopy. Atomic‐scale observations suggest that the grain boundaries of the two materials are free of grain‐boundary films. Two triple‐junction phases were found and characterized to be rhombohedral Fe2B103 and orthorhombic Ti3... hiện toàn bộ
Preparation of Monolithic Silica Aerogel of Low Thermal Conductivity by Ambient Pressure Drying
Journal of the American Ceramic Society - Tập 90 Số 7 - Trang 2003-2007 - 2007
Te‐Yu Wei, Tso‐Fu Mark Chang, Shih‐Yuan Lu, Yu‐Cheng Chang
Monolithic silica aerogels with thermal conductivity as low as 0.036 W·(m·K)−1 and porosity as high as 97% were successfully prepared by ambient pressure drying through a multiple modification approach. This approach may replace the more costly and dangerous operation of supercritical drying. The tetraethoxysilane (TE...... hiện toàn bộ
Chemical Durability of Silicon Oxycarbide Glasses
Journal of the American Ceramic Society - Tập 85 Số 6 - Trang 1529-1536 - 2002
Gian Domenico Sorarù, Stefano Modena, E. Guadagnino, Paolo Colombo, J. M. Egan, Carlo G. Pantano
Silicon oxycarbide (SiOC) glasses with controlled amounts of Si—C bonds and free carbon have been produced via the pyrolysis of suitable preceramic networks. Their chemical durability in alkaline and hydrofluoric solutions has been studied and related to the network structure and microstructure of the glasses. SiOC glasses, because of the character of the Si—C bonds, exhibit greater chemic...... hiện toàn bộ
Gas Sensing Behavior of Mesoporous SiOC Glasses
Journal of the American Ceramic Society - Tập 96 Số 8 - Trang 2366-2369 - 2013
Aylin Karakuscu, Andrea Ponzoni, Aravind Parakkulam Ramaswamy, Giorgio Sberveglieri, Gian Domenico Sorarù
In this study, for the first time, we report the gas sensing behavior of aerogel‐derived silicon oxycarbide (SiOC) glasses. The SiOC glass pyrolyzed at 1400°C has specific surface area of 150 m2/g with pore size in the 2–20 nm range. SiOC sensor shows good response to 5 ppm NO2 at 300°C....... hiện toàn bộ
Bonding strength and thermal shock resistance of a novel bilayer (c‐AlPO4‐SiCw‐mullite)/SiC coated carbon fiber reinforced CMCs
Journal of the American Ceramic Society - Tập 103 Số 1 - Trang 82-93 - 2020
Pengju Chen, Peng Xiao, Zhuan Li, Ling Pan, Jinwei Li, Zeyan Liu, Dongmei Pu, Yang Li
AbstractMullite coating, SiC whiskers toughened mullite coating (SiCw‐mullite), and cristobalite aluminum phosphate (c‐AlPO4) particle modified SiCw‐mullite coating (c‐AlPO4‐SiCw‐mullite) were prepared on SiC...... hiện toàn bộ
Depolymerization of GeO2 and B2O3‐GeO2 Network Glasses by Sb2O3
Journal of the American Ceramic Society - Tập 56 Số 6 - Trang 303-309 - 1973
E. F. Riebling
Binary Sb2O3‐GeO2 glasses containing 45 mol% Sb2O3 and ternary Sb2O3‐B2O3‐GeO2 glasses containing 50 mol% GeO2 were prepared. Their densities (volumes), refracti...... hiện toàn bộ
Formation of ferrospinel layer at the corroded interface between Al2O3‐spinel refractory and molten steel in RH refining ladle
Journal of the American Ceramic Society - Tập 104 Số 11 - Trang 6044-6053 - 2021
Junfeng Chen, Yaping Cheng, Yuanyuan Li, Junli Xiao, Yu Zhang, Guangping Liu, Yaowu Wei, Guangqiang Li, Shaowei Zhang, Nan Li
AbstractRefining ladle is generally the last inclusion‐removal vessel before the continuous casting of steel, so, it has a vital effect on the final steel quality. In this work, degradation process of a cement‐free Al2O3‐MgAl2O4 refractory in contact with molten steel/slag in the me...... hiện toàn bộ
Chemical Compatibility Investigation of Thin‐Film Oxygen Transport Membranes on Metallic Substrates
Journal of the American Ceramic Society - Tập 94 Số 3 - Trang 861-866 - 2011
Ye Xing, Stefan Baumann, Doris Sebold, Matthias Rüttinger, Andreas Venskutonis, Wilhelm Albert Meulenberg, D. Stöver
Thin‐film La0.58Sr0.4Co0.2Fe0.8O3−δ (LSCF58428) exhibits high oxygen permeability due to its high ionic and electronic conductivity. In order to increase the oxygen flux, a thin‐film membrane on a structural substrate is beneficial. Different Ni‐based alloys were studied as ...... hiện toàn bộ
In Situ Synchrotron X‐Ray Diffraction Study of the Rhombohedral‐to‐HT‐Cubic Phase Transformation in Ln6WO12 (Ln = Y, Ho, Er, Yb)
Journal of the American Ceramic Society - Tập 97 Số 4 - Trang 1256-1263 - 2014
Zlatomir D. Apostolov, Pankaj Sarin, Robert W. Hughes, Waltraud M. Kriven
The high‐temperature rhombohedral‐to‐fcc phase transformation in the Ln6WO12 (Ln = Y, Ho, Er, Yb) system was investigated by thermal analysis and in situ X‐ray diffraction. The process was characterized by thermodynamic, kinetic, and mechanistic criteria, and the role of the rare‐earth cation on the transformation propert...... hiện toàn bộ
Tổng số: 743   
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