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Journal Citation (to be inserted by the publisher ) Copyright by Trans Tech Publications Development of Hydroxyapatite Ceramics with Tailored Pore Structure Ulrike Deisinger1, Frauke Stenzel2 and Günter Ziegler1,2 1 Friedrich-Baur-Research Institute for Biomaterials, University of Bayreuth, 95440 Bayreuth, Germany, e-mail: ulrike.deisinger@fbi-biomaterialien.de 2 BioCer EntwicklungsGmbH, Bayreuth, Germany Keywords: hydroxyapatite ceramics, interconnecting porosity, slip casting, bone substitute materials, rapid prototyping Abstract.
Materials and Methods For producing the slurry the commercially available hydroxyapatite powder from Merck, Germany, was used.
Journal Title and Volume Number (to be inserted by the publisher) Green and sintering density values were determined with cast dense cylinders.
By using different types of polymeric pore models with diverse grades of porosity (50 to 96 vol%) and pore sizes (400 to 900 µm) as basic materials the pore structure of the bioceramic (undirected pores as well as defined pore channels) could be tailored according to the requirements of the specific implantation site.
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The aforesaid problem is tackled by considering the constitutive equation (3) for ferromagnetic materials [11], [12]
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Acknowledgment This paper is supported by the foundation items: Project supported by Natural Science Foundation of China (Grant No. 51169007), Science & Research Program of Yunnan province (No. 2010DH004 & No. 2011CI017), Foundation of Kunming University of Science and Technology (No.
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A upper entry used for translating the packing materials was arranged at the steady overlying strata on the top of the working face, and it had a parallel position to the strike of the coal seam[4].
Here we suggest the rational stowing material could be high water material, paste-like material, high concentration cemented stowing material or ultra high water material.
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The two materials are completely recrystallized after 8 min.
The precipitates exist in the two materials, but obviously with a lower fraction in the material C.
The results have shown that the average size of precipitates in two materials is lower than 1 µm.
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Introduction With the development of materials science, new composite materials with high strength and light mass have come into being, and the materials of arch have been constantly updated.
Because of the superb properties of high strength and high temperature resistance, FGMs (functionally graded materials) are ideal materials for preparing structural elements used in aerospace, nuclear reactors and other high temperature environments.
Assuming that the material of the FGM arch is thermal elastic, the constitutional relationship of the material can be written as
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Are these graphite-based materials effective microwave absorbers?
Can these materials be excellent additives for other absorbers?
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