http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
정왕일,김현욱,진성빈,신용진 明知大學校 産業技術硏究所 1997 産業技術硏究所論文集 Vol.16 No.-
In this paper, we propose a system to quickly and precisely measure magnetic properties of amorphous wire or ribbon well-known as an excellent sensing element. The system consists of the circuits to measure magnetic properties and the unit to display M-H loop on computer monitor. First, we design analog circuits using OP Amp and then make interfacing the circuits with a computer by using A/D converter. As the result, we can display precise M-H loops on computer monitor.
정왕일,이용찬,정승우,신용진 明知大學校 産業技術硏究所 1998 産業技術硏究所論文集 Vol.17 No.-
In this study, we deal with the effect on magnetic properties when Nd is added to Sr·ferrite bonded magnet. First, we choose ??, which is nonstoichiomatric composition, as specimen ferrite. Then, we add 5wt% polyvinyl alcohol and calcinate at 1225℃ under N₂ environment for carbon coating on chemical compound specimen. After that we obtain 1.2㎛ single domain powder through grinding process for 18 hours. The 90wt% Sr ferrite powder is well mixed with silane coupling and calcium stearate of 1wt%. Then, it is kneaded by using polyamide12 as a binder and is pelleted. After adding Nd-Fe-B powder to the pelleted specimen, we injection-mould it under magnetic field by using anisotropic mould. Especially, when we add 13wt% Nd-Fe-B powder to the polyamide12, we obtain excellent magnetic propertiecs which are ??, Br=3.16KG and ??.
신용진,문형욱,진성빈,정왕일 한국전기전자재료학회 1997 電氣電子材料學會誌 Vol.10 No.5
This research has been performed for the fabrication of high quality ferrite plastic magnet. The magnetic properties of S $r_{5.9}$F $e_2$ $O_3$ ferrite bonded magnets by injection moulding with a variety of applied magnetic field were investigated. 0.3wt% CaCO3, 0.2wt% $SiO_2$, 0.5wt% $Al_2$ $O_3$and 0.5wt% N $a_2$ $SiO_3$are added in order to improve the magnetic properties of Sr-ferrite plastic magnets during the powder fabrication. For carbon coating on chemical compound specimen, 5wt% polyvinyl alcohol is added, and then calcinated under $N_2$ environment of 12$25^{\circ}C$. The particle size is distributed from 0.9~1.2${\mu}{\textrm}{m}$ which approximates to the single domain. The obtained Sr ferrite powder is well mixed with silane coupling and calcium stearate of 1wt%. Nest, the specimen is pelleted after kneading each of them with polyamidel2 as a binder. When the temperature of injection and mould were 25$0^{\circ}C$ and 8$0^{\circ}C$ respectively at injection pressure of 200kgf/$\textrm{cm}^2$, the degree of orientation was 85.3% under the applied magnetic field of 12kOe. As the results, when the packing density of Sr ferrite powder was 90wt%, the magnetic properties of Sr ferrite bonded magnet were follows : $_{B}$ $H_{c}$=2.41kOe, Br=3.1kG, (BH)$_{max}$=2.21MgOe. Especially, the Sr-ferrite bonded magnet with 10wt% N $d_2$F $e_{14}$B additive were as follows : $_{B}$ $H_{c}$=2.57kOe, Br=3.14kG and (BH)$_{max}$=2.39MGOe.GOe.GOe.GOe.e.