| Budget Amount *help |
¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Outline of Final Research Achievements |
a new metal bonding method using a ceramic precursor (titanium tetraisopropoxide and Zirconium butoxide) were proposed. The magnetic properties of toroidal core such as hysteresis curve, residual magnetization, coercive force, iron loss are deteriorated by interlocking and thermal inserting process after punching process. It is from the residual stress of each process. Magnetic properties of ceramic bonded toroidal core with DC magnetization are reduced by 40 % compared with as punched core. Because ceramic bonding process includes the stress relief heat treatment at 750 degree for 2 h in a reducing atmosphere. Eddy current loss is increased incredibly. Because ceramic bonded insulation layer is not sufficiently formed.
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