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  1. No Access

    Article

    Lowering The Percolation Threshold In Carbon Blackfilled Polymer Composites

    In an effort to lower the percolation threshold of carbon black-filled polymer composites, various polymer microstructures were examined. Composites prepared with a polyvinyl acetate (PVAc) latex and a poly(vi...

    J. C. Grujnlan, W. W. Gerberich, L. F. Francis in MRS Online Proceedings Library (1999)

  2. No Access

    Article

    Effect of Curing Strategies on Porosity in Silanemodified Silica Colloidal Coatings

    Suspensions of silica (20 nim) in propoxyethanol were used to make porous silica coatings. A silane coupling agent, glycidoxypropyltrimethoxysilane (GPS), was added as a binder to increase coating durability a...

    M. W. Daniels, L. F. Francis in MRS Online Proceedings Library (1999)

  3. No Access

    Article

    Use of an Organosilane Coupling Agent in Colloidal Silica Coatings

    Coatings were prepared from suspensions containing colloidal silica (20nm) in isopropanol and 3-glycidoxypropyltrimethoxysilane (GPS). Thicker coatings without cracks were achieved by increased addition of GPS...

    M. W. Daniels, L. Chu, L. F. Francis in MRS Online Proceedings Library (1996)

  4. No Access

    Article

    Glycidoxypropyltrimethoxysilane Modified Colloidal Silica Coatings

    Coatings were prepared from a suspension of colloidal silica particles containing glycidoxypropyltrimethoxysilane (GPS) and a polyamine curing agent. GPS was first added to an aqueous silica suspension which c...

    L. Chu, M. W. Daniels, L. F. Francis in MRS Online Proceedings Library (1996)

  5. No Access

    Article

    Mechanical Behavior of a Mems Acoustic Emission Sensor

    The elastic modulus and hardness of materials used in a MEMS acoustic emission sensor were determined using nanoindentation techniques. In addition to testing each individual material, the behavior of four can...

    D. F. Bahr, J. S. Wright, L. F. Francis, N. R. Moody… in MRS Online Proceedings Library (1996)

  6. No Access

    Article

    Processing and Piezoelectric Properties of MOD PZT Films and PZT/Polymer Composite Coatings

    Lead zirconate titanate, Pb(Zr0.53Ti0.47)O3 (PZT), coatings were prepared using a metallorganic decomposition (MOD) route with lead and titanium acetates and zirconium acetylacetonate in acetic acid and water. Fi...

    J. S. Wright, L. F. Francis in MRS Online Proceedings Library (1996)

  7. No Access

    Article

    Ferroelectric Thin Films in Microelectromechanical Systems Applications

    D. L. Polla, L. F. Francis in MRS Bulletin (1996)

  8. No Access

    Article

    Processing of calcium metaphosphate-based glass-ceramic coatings on alumina

    Dense, crystalline, glass-ceramic coatings containing calcium metaphosphate and aluminum phosphate were prepared on aluminum oxide substrates by a three-step method. The processing involved glass (40 mol% CaO,...

    K. J. Vaidya, L. F. Francis in Journal of Materials Research (1996)

  9. No Access

    Article

    An Experimental Examination of Mems Microactuator Material Issues

    Thermally induced interactions between materials in complex microactuator structures were investigated. The device structure contained a combination of a piezoelectric layer (lead zirconate titanate - PZT) an ...

    T. G. Cooney, D. E. Glumac, W. P. Robbins, L. F. Francis in MRS Online Proceedings Library (1994)

  10. No Access

    Article

    A Theoretical Examination of Mems Microactuator Responses with an Emphasis on Materials and Fabrication

    A free standing cantilever beam consisting of a support structural material (polysilicon/silicon nitride), a piezoelectric PZT ceramic layer, and metal electrode layers has been analyzed. Beam theory and finit...

    D.E. Glumac, T.G. Cooney, L.F. Francis, W.P. Robbins in MRS Online Proceedings Library (1994)