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The aim of the present work is to develop a solid-state reaction-pyrolysis process (SRPP) of poly (vinyl alcohol) PVA and boric acid for the synthesis of boron carbide. PVA and boric acid in a molar ratio of (4:1) were dry-mixed, solid-state reacted by heating at (200–250)°C in air, and were directly pyrolyzed at (700–800)°C in air to obtain preceramic precursors. By varying the holding time at 250°C...
Nano plated and high-purity boron carbide (B4C) powder was synthesized via a novel method, based on a solid-state reaction of poly (vinyl alcohol) PVA and boric acid at (200–250) °C in air. The cross-linking between PVA and boric acid was proven by FTIR analysis. The obtained product, a new-type of poly vinyl borate (PVBO), was consecutively pyrolyzed at (700–800) °C for 120min in air (S1); or was...
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