期刊
CERAMICS INTERNATIONAL
卷 44, 期 8, 页码 9887-9892出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2018.03.002
关键词
Boron carbide; Poly (vinyl alcohol) (PVA); Boric acid; Solid-state polymerization (SSP); Nano particles
资金
- Key Laboratory of Liaoning Province for Polymer Catalytic Synthesis
- Liaoning Provincial Engineering Laboratory for Advanced Polymeric Materials
- High-tech Research and Development Project of Liaoning Provincial Industrial Special Resources Protection Office [[2013]736]
Nano spherical particles and rod-like shape B4C synthesized by a solid-state polymerization (SSP) of PVA and BA, and through performing the reaction of their dry mixture under vacuum at (200 - 250) degrees C. FTIR analysis shows the presence of (B-O-C) bond, which confirms the cross-linking of PVA and BA. The formed PVBO precursor was ground, heated at 250 degrees C for 120 min, and pyrolyzed at (650 - 800) degrees C for 120 min in air. The XRD analysis shows that a high purity boron carbide was obtained from the preceramic precursor S-6 (pyrolyzed at 700 degrees C) by heat treatment at 1475 degrees C for 120 min in the flow of Ar. The unique morphology of the produced B4C in this work is attributed to the preparation of the precursor by the under-vacuum reaction condition.
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