Preparation and mechanical properties of machinable alumina/mica composites

ArticleJOURNAL OF THE EUROPEAN CERAMIC SOCIETY. 26(9): 1687 -1693 (2006)journal articl

Low-temperature sintering of Z-type hexagonal ferrite by addition of fluorine containing glass powder

The original publication is available at www.springerlink.com.ArticleJOURNAL OF MATERIALS SCIENCE. 40(1): 165-170 (2005)journal articl

Influence of Cu2O Addition on Crystallization Process and Microstructure of Transparent Mica Glass-Ceramics

ArticleKey Engineering Materials. 617: 209-212 (2014)journal articl

Effect of layer charge on chemical and physical properties of synthetic K-fluorine micas

The original publication is available at www.springerlink.com.ArticleJOURNAL OF MATERIALS SCIENCE. 40(21): 5597-5602 (2005)journal articl

Thermal transformation and ionic conductivity of ammonium ion-exchanger prepared from Na-4-mica

Ammonium ion exchange of Na-4-mica and thermal transformation of the ion-exchanger were investigated and the conductivities of the heated ion-exchangers were estimated. More than 95.4% of Na+ ions in the interlayer of the Na-4-mica could be substituted by NH4+ ions after repeating ion exchange four times. Almost of NH4+ ions remained in the interlayer at 700 degrees C and they were completely decomposed into protons at 900 degrees C. The conductivities of the ion-exchangers heated at 700-900 degrees C were 10(-7)-10(-6) S/cm at 700 degrees C. The conduction mechanism of the ion-exchangers heated at 700 and 800 degrees C was NH4+ ion migration in the interlayer and that of the ion-exchanger heated at 900 degrees C was proton migration. However, the contribution of residual Na+ ions to the conduction cannot be excluded. (C) 2010 Elsevier B.V. All rights reserved.ArticleMaterials Science and Engineering: B. 173(1-3):271-274 (2010)journal articl

Crystallization process and some properties of novel transparent machinable calcium-mica glass-ceramics

ArticleCERAMICS INTERNATIONAL. 34(1): 75-79 (2008)journal articl

New synthetic method and ionic conductivity of Na-4-mica

ArticleMATERIALS LETTERS. 60(4): 464-466 (2006)journal articl

Preparation of M-0 metal/alumina-pillared mica composites (M = Cu, Ni) by in situ reduction of interlayer M2+ ions of alumina-pillared fluorine micas

ArticleMATERIALS RESEARCH BULLETIN. 42(12): 2143-2149 (2007)journal articl

Morphology control and interlayer pillaring of swellable Na-taeniolite mica crystals

Na-taeniolite (NaMg2LiSi4O10F2) mica crystals were synthesized from nonstoichiometric raw batches containing NaCl as a flux, in order to control the morphology of mica crystals. Swellable Na-taeniolite was obtainable from both stoichiometric and nonstoichiometric batches although small amounts of different products were coprecipitated, depending on the composition of the raw batches. Samples obtained from raw batches containing <= 1 mol NaCl consisted of a single-phase swellable mica. The addition of a small amount of NaCl was effective in controlling the morphology of the mica crystals. Raw batches containing 1 mol NaCl yielded mica crystals having a hexagonal, plate-like morphology with a larger aspect ratio. Alumina-pillared micas prepared from host micas thus obtained from raw batches containing NaCl had larger specific surface areas than those obtained from stoichiometric batches. This suggests that the swellability of mica crystals is also affected by the addition of NaCl.ArticleMATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS. 177(7):524-527 (2012)journal articl

Densification of rare-earth (Lu, Gd, Nd)-doped alumina nanopowders obtained by a sol-gel route under seeding

Rare-earth (RE: Lu, Gd, Nd, 0.10 mol%)-doped alumina nanopowders were prepared by a new sol-gel route using polyhydroxoaluminum (PHA) and RECl(3) Solutions under alpha-alumina (similar to 75 nm) seeding. Among the rare-earth dopants studied, Lu yields the most suitable nanopowders for low-temperature densification. The 0.10 mol% Lu-doped nanopowders, which were obtained at a calcination temperature of 900 degrees C under 5 mass % alpha-alumina seeding, consisted of similar to 80-nm alpha-alumina particles and gamma-alumina nanoparticles. Using these Lu-doped alumina nanopowders, fully densified alumina ceramics with a uniform microstructure composed of fine grains with an average size of 0.61 mu m could be obtained at 1400 degrees C by pressureless sintering. Clearly, the Lu-doped nanopowders obtained here represent a viable option for fabricating dense, finer-grained alumina ceramics because an undoped sample with 5 mass% seeds gave a microstructure with an average grain size of 1.78 mu m at 1400 degrees C. (C) 2009 Elsevier B.V. All rights reserved.ArticlePOWDER TECHNOLOGY. 193(1):26-31 (2009)journal articl