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- W2022975263 abstract "Submicrometer alumina suspensions, dispersed in aqueous acidic solutions of polyvinyl alcohol (PVA) and 2,5-dimethoxy-2,5-dihydrofuran, have been evaluated for suitability as a cross-linkable binder system for casting complex-shaped ceramic components. Suspensions of up to 50 vol% solids have rheological behavior, which is suitable for pouring and filling molds. Complex-shaped green bodies are then formed by heating the suspension in the mold for a period of time (typically 15–60 min) at moderate temperature (60°–80°C) to gel the suspension. High green densities (58%–62% of full density) can be obtained. The dried green bodies have strength in excess of 1 MPa and may be readily machined. No more than 1–3 wt% PVA per weight of alumina is necessary, ensuring burnout that minimizes generation of flaws. The ceramic components can be fired to >96% of full density when fired for 2 h at 1400°–1450°C. Cross-linkable PVA may receive more widespread acceptance in ceramic processing than previous gelcasting formulations because PVA is already a common processing additive." @default.
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- W2022975263 date "2008-10-01" @default.
- W2022975263 modified "2023-10-02" @default.
- W2022975263 title "Cross-linked Polyvinyl Alcohol as a Binder for Gelcasting and Green Machining" @default.
- W2022975263 doi "https://doi.org/10.1111/j.1551-2916.2008.02534.x" @default.
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