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Yoshiro Shimojo,Kunio Matsuzaki,Ruiping Wang,Tadashi Sekiya 한국물리학회 2005 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.46 No.1
To develop lead-free piezoelectric materials, (1 { x)(K0:6Na0:4)NbO3-xBaTiO3 and (1x)(K0:6Na0:4)NbO3-xSrTiO3 solid solutions were prepared by the hot-press method. The dielectric and piezoelectric properties of the samples were investigated as a function of dopant content x and type of dopant ions. It is found that the ferroelectric phase transition temperatures are dominated by the x value and the piezoelectric properties depend on both x and the type of dopant ions. The reasons for the results are discussed.
Recycling of Stainless Steel Grinding Sludge
Shimizu Toru,Hanada Kotarou,Adachi Satoru,Katoh Masahito,Hatsukano Kanichi,Matsuzaki Kunio 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
Stainless steel sludge is generated as a waste in the grinding process, and the possibility of recycling stainless steel is considered here. In this study, we considered the possibility of using the stainless steel sludge as metal powder for MIM or raw material for metal foam. For the MIM process, the metal powder will need some improvement, and flotation and spheroidizing processes of the sludge are necessary. For fabrication of the metal foam, untreated sludge can be used, and steel foam about 90% porosity is produced.