ALUMINA COMPOSITE, PROCESS FOR PRODUCING ALUMINA COMPOSITE, AND POLYMER COMPOSITION CONTAINING ALUMINA COMPOSITE

摘要

For the purpose of producing an alumina composite in which the integrity between alumina and an inorganic material is further improved, a dispersion liquid preparation step (ST1), a solidification step (ST2) and a burning step (ST3) are performed, wherein the dispersion liquid preparation step (ST1) comprises preparing a dispersion liquid in which an inorganic material such as a carbon material is homogeneously dispersed in an alumina raw material solution having an organic additive dissolved therein, the solidification step (ST2) comprises drying the dispersion liquid to produce a solid raw material, and burning step (ST3) comprises burning the solid raw material in a non-acidic atmosphere while contacting hydrogen chloride with the solid raw material. In this manner, an alumina composite can be produced, in which at least a portion of an inorganic material such as a carbon material is embedded in the inside of each of a-alumina single crystal particles the constitute alumina particles.