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  • 1
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 136 (Feb. 2008), p. 67-74 
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: PLZT9/65/35 thick films were prepared from the solution containing PVP360(polyvinylpyrrolidone, with average molecular weight of 360000). With the solutions, the criticalthickness of a single PLZT layer could increase to ~624nm compared with 77nm-thick filmsprepared without PVP360. Furthermore, by adding 20~35% excess of Pb to the precursor solutions,the nano-porous rosette-like structures and a small amount of pyrochlore remnant, which werefound very common in the PVP-modified films, could be eliminated. 35% Pb excess was also foundto initiate liquid-phase sintering, leading to dense and crack-free films. The effect of Pb excess onthe rosette removal and densification behavior of the films was discussed. Moreover, the optical andelectrical properties of the PLZT films with 35% Pb excess were also studied
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Bingley : Emerald
    Rapid prototyping journal 7 (2001), S. 262-268 
    ISSN: 1355-2546
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: There are many applications for rapid prototyping systems and application in the biomedical field is an important domain. Uses selective laser sintering (SLS) in this study to build porous cylindrical disc matrices for use as drug delivery devices (DDD). Studies the part-bed temperature to ascertain its influence over the porosity of the disc matrices. They are found to have an inverse linear relationship. Also investigates the dense walls, the inherent consequences of building porous structures with the SLS, in the disc matrix as they have a direct impact on the performance of the DDD. Discusses the size constraint of the disc matrix due to the limitations of the SLS process. Also investigates the possibility of creating disc matrices of varying porosity. Experimental results demonstrate that SLS is viable in producing DDDs that have variable porosity and micro-features.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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