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Versatile Crack-Free Ceramic Micropatterns Made by a Modified Molding Technique

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Crack-free ceramic micropatterns made of oxidic ceramic powders, e.g. alumina, titania, zirconia, and nonoxidic calciumphosphate ceramic powders were fabricated by a novel, simple, and low-cost modified micromolding (m-M) technique via polydimethylsiloxane stamps. By means of this m-M technique it is possible to fabricate monolithic ceramic bodies with a micropatterned surface with very high accuracy on surface detail. Our produced micropatterns can feature various geometries, e.g. cylinders, holes, channels, and struts with diameters ranging from 8 to 140 m in diameter or widths and from 8 to 30 m in depth or height. The oxidic and nonoxidic ceramic micropatterns could be removed from the molds and dried without any cracks. Even after sintering, these micropatterned samples showed no cracks or fissures. The reported technique has a very high potential for fully automatized up-scale fabrication of micropatterned ceramic surfaces.
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Document Type: Research Article

Affiliations: 1: Advanced Ceramics, University of Bremen, Bremen, Germany 2: Institute for Microsensors, -Actuators and -Systems (IMSAS), University of Bremen, Bremen, Germany

Publication date: 2010-09-01

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