자기펄스 성형법에 의한 TiO₂나노 분말의 치밀화

In this research, the fine-structure TiO₂bulks have been fabricated by the combined application of magnetic pulsed compaction (MPC) and subsequent sintering, and their densification behavior was investigated. The obtained density of TiO₂bulk prepared by the combined processes was increased with increasing MPC pressure from 0.3 to 0.7 GPa. Relatively higher density (88%) in the MPCed specimen at 0.7 GPa was attributed to the decreasing of the inter-particle distance of pre-compacted component. High pressure and rapid compaction by Magnetic Pulsed Compaction could reduce shrinkage rate (about 10%) of the sintered bulks compared to that of general processing (about 20%). Mixing conditions of PVA, water, and TiO₂nano powder for compaction of TiO₂nano powder did not affect on density and shrinkage of the sintered bulks due to high pressure of MPC.