BELL-STRUCTURED PARTICLE AND METHOD FOR PRODUCING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a bell-structured particle of which the limitation on producing is little, the heat resistance is excellent, and the capability of reducing vibration and sound is high.SOLUTION: The bell-structured particle is composed of a shell and one or more nuclear fine particles being smaller than the shell and involved in the vacancy of the shell. Each of the shell and the nuclear fine particle consists of an inorganic material.