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  • 2005-2009  (14)
  • 1990-1994  (45)
  • 1
    Electronic Resource
    Electronic Resource
    Decrystallizing Solid Crystalline Titania, Without Melting, Using Microwave Magnetic Fields (2005)
    Oxford, UK : Blackwell Science Inc
    Journal of the American Ceramic Society 88 (2005), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: TiO2—a prototype ceramic—was decrystallized in a 2.45 GHz AC magnetic field in a single mode TE103 applicator. The titania powders were synthesized by a sol–gel process and pressed into circular pellets. The pellets were very slightly reduced at 1273 K in a reducing atmosphere. The reduced pellets were introduced into the single mode microwave cavity and placed at the magnetic field maximum node and exposed for 10–30 s in a forming gas atmosphere. The reacted samples were then characterized by XRD, SEM, Raman, and TEM. The data presented in this note demonstrate that a very short treatment in the AC magnetic field at 2.45 GHz can transform rutile structure oxides to a noncrystalline state.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1551-2916.2005.00261.x
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  • 2
    Electronic Resource
    Electronic Resource
    Leave well alone and stick to teaching what you know (2005)
    [s.l.] : Nature Publishing Group
    Nature 435 (2005), S. 276-276 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Sir Your Editorial “Dealing with design” (Nature 434, 1053; 200510.1038/4341053a) is another piece of evidence of the peculiar angst among certain scientists about the ID strategy of a rather robust ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/435276a
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  • 3
    Electronic Resource
    Electronic Resource
    Bulk synthesis and selective exchange of strontium ions in Na 4 Mg 6 Al 4 Si 4 O 20 F 4 mica (1992)
    [s.l.] : Nature Publishing Group
    Nature 357 (1992), S. 571-573 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Environments containing the radionuclide 137Cs can be suc-cessfully decontaminated through the use of a highly selective caesium ion sieve made by topotactic leaching of a naturally occurring phlogopite mica16'17. This material was found to be far superior to other naturally occurring and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/357571a0
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  • 4
    Electronic Resource
    Electronic Resource
    Apologies to Bianconi (1992)
    [s.l.] : Nature Publishing Group
    Nature 359 (1992), S. 472-472 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR - National science policy has been a primary focus of mine fpr many years. It is a subject to which I have dedicated considerable time and energy. The issue of overselling science is an issue in national science policy that deserves not only mine but others' time and energy. Over the past year, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/359472a0
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  • 5
    Electronic Resource
    Electronic Resource
    Rustum Roy replies (1991)
    [s.l.] : Nature Publishing Group
    Nature 354 (1991), S. 9-9 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR - You take a whole page in News and Views (Nature 351, 13; 1991) to advance a case that I am "making a mountain of a molehill" without providing your readers with any factual background on the "issue". Your attack is full of errors and misinterpretations. At the request of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/354009b0
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  • 6
    Electronic Resource
    Electronic Resource
    Synthesis, sintering and thermal expansion of Ca1-x Sr x Zr4P6O24 — an ultra-low thermal expansion ceramic system (1991)
    Springer
    Journal of materials science 26 (1991), S. 93-98 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Ca1-x Sr x Zr4P6O24 (O ⩽ × ⩽ 1.0) system which belongs to a new large family of low thermal expansion materials known as NZP or CTP, was synthesized by the solid state and the sol-gel methods. The conventional sol-gel method was modified by introducing a seeding step which resulted in significant improvement in the sintering characteristics and the microstructure of the sintered material. Sintering data were compared with those obtained by the powder mixing technique. Thermal expansion of the sintered samples was measured by classical dilatometry and by high-temperature X-ray diffractometry. It was found that CaZr4P6O24 (x= 0) and SrZr4P6O24 (x= 1) phases had opposite anisotropies in their respective axial thermal expansions. This behaviour led to the development of a crystalline solution composition of nearly zero expansion characteristic. Microstructures of the sintered specimens were examined by scanning electron microscopy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00576037
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  • 7
    Electronic Resource
    Electronic Resource
    Modified mixed oxide perovskites 0.7Sr(Al1/2B1/2) O3·0.3LaAlO3 and 0.7Sr(Al1/2B1/2) O3·0.3NdGaO3 (B=Ta5+ or Nb5+) for high-T c superconductor substrate applications (1994)
    Springer
    Journal of materials science 29 (1994), S. 5054-5058 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Single-crystal fibres of modified strontium aluminium tantalum oxide (1-x)Sr(Al1/2Ta1/2) O3·xLaAlO3(SAT-LA) and (1-x)Sr(Al1/2Ta1/2)O3·xNdGaO3 (SAT·NG), and modified strontium aluminum niobium oxide (1-x)Sr(Al1/2Nb1/2)O3·xNdGaO3(SAT·NG) and (1-x)Sr (Al1/2Nb1/2)O3·xLaAlO3 (SAN·LA) were grown using a laser-heated pedestal growth technique. 0.7SAT·0.3LA grows congruently and retains a twin free simple cubic perovskite structure (as the SAT) when cooled down to room temperature. 0.7SAT·0.3LA crystals have a moderate dielectric constant (κ = 21.7) and low dielectric loss (tan δ = 7.5 × 10−5) at 10 kHz and 90 K. The reduction problem of Ta5+ is eliminated (which is common in the case of SAT growth). 0.7SAT·0.3NG and 0.7SAN·0.3NG have lower melting temperatures and crystal growth is easier. NdGaO3 addition to the SAT and SAN enhances the potential of SAT and SAN as large-area substrates for high-T c superconductor growth. However, the dielectric constants increased from κ∼-12 to κ∼-16(0.7SAT·0.3NG) and from κ∼18 to κ∼23 (0.7SAN·0.3NG) as a result of NdGaO3 incorporation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01151096
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  • 8
    Electronic Resource
    Electronic Resource
    “Biomimetic” materials: A potential distortion of materials policies (1991)
    Weinheim : Wiley-Blackwell
    Advanced Materials 3 (1991), S. 448-451 
    Details
    ISSN: 0935-9648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/adma.19910030911
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  • 9
    Electronic Resource
    Electronic Resource
    Science publishing needs a reformation (1993)
    Weinheim : Wiley-Blackwell
    Advanced Materials 5 (1993), S. 141-143 
    Details
    ISSN: 0935-9648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/adma.19930050216
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  • 10
    Electronic Resource
    Electronic Resource
    Concise encyclopedia of materials economics, policy and management. Edited by Michalel B. Bever, Pergamon Press, Oxford 1993, XXVII, 460 pp., hardcover, $ 240, ISBN 0-08-037 056-X (1994)
    Weinheim : Wiley-Blackwell
    Advanced Materials 6 (1994), S. 86-86 
    Details
    ISSN: 0935-9648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/adma.19940060122
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