Synthesis of AlON powders through a polymerization template approach by spark plasma sintering
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As a new wet chemical method, polymer template strategy uses monomer polymerization to form a continuous carbonnetwork. The carbon skeleton can make the carbothermal reduction reaction take place in the original, thus preventing theexcessive agglomeration of grains. The Al2O3 / C ceramic precursor were obtained by polymer template strategy, and thenAlON powders with 3 μm size were synthesized through a spark plasma sintering (SPS) method at 1,650 °C. We confirmedthat a continuous network of carbon chains was formed by polymerization to encapsulate the alumina powder, so as to reducethe contact growth of the grains during the high-temperature carbothermal reaction. We established that, when the mass ratioof carbon source to alumina was 1.6:10, the pure AlON powder could be prepared by calcining at 1,650 °C for 20 min in aflowing nitrogen atmosphere.
Abstract
As a new wet chemical method, polymer template strategy uses monomer polymerization to form a continuous carbonnetwork. The carbon skeleton can make the carbothermal reduction reaction take place in the original, thus preventing theexcessive agglomeration of grains. The Al2O3 / C ceramic precursor were obtained by polymer template strategy, and thenAlON powders with 3 μm size were synthesized through a spark plasma sintering (SPS) method at 1,650 °C. We confirmedthat a continuous network of carbon chains was formed by polymerization to encapsulate the alumina powder, so as to reducethe contact growth of the grains during the high-temperature carbothermal reaction. We established that, when the mass ratioof carbon source to alumina was 1.6:10, the pure AlON powder could be prepared by calcining at 1,650 °C for 20 min in aflowing nitrogen atmosphere.
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