Fe-Si-Cr合金粉之添加水玻璃絕緣處理研究

Study of sodium silicate insulation treatment for Fe-Si-Cr alloy powder

張軒耀(張 軒耀)

指導教授 ： 陳適範

共同指導教授 ： 王錫九

國立臺北科技大學/工程學院/材料及資源工程系研究所/碩士(2014年)

https://doi.org/10.6841/NTUT.2014.00906

摘要

本研究藉由Fe-Si-Cr合金粉末進行磷化處理，再添加不同含量之水玻璃進行造粒、成型、退火處理，再量測其電磁性質並觀察其粉末披覆效果。使用SEM觀察出水玻璃成功披覆於粉末的表面狀態，其中又以添加4 wt%水玻璃表面狀況較佳。由VSM數據顯示隨著磷酸及水玻璃的添加，飽和磁化強度由191.38 emu/g下降到107.98 emu/g。從鹽霧實驗中，發現水玻璃添加2 wt%會產生生鏽的狀況，而水玻璃的量增加至4 wt%以上就不會生鏽。在研究中可發現，添加越多磷酸，磷化層披覆粉末效果越顯著，因此造成絕緣阻抗的提升。而水玻璃添加越多，會有較高絕緣阻抗。在導磁率以及品質因子分析結果中，較佳的方案為磷酸2 wt%+水玻璃4 wt%，兼顧阻抗值、表面氧化、導磁率及品質因子。

關鍵字

鐵系合金 ； 絕緣阻抗 ； 電磁性質。

並列摘要

This study for Fe-Si-Cr alloy powder phosphating,and add different amounts of sodium silicate granulated,forming,annealing,and then measure its magnetic properties and to observe the effect of the powder coated. SEM observation of the successful use of sodium silicate is coated on the powder surface state,among which sodium silicate added 4 wt% better surface condition. As the VSM data adding phosphoric acid and sodium silicate,the saturation magnetization of 191.38 emu / g dropped to 107.98 emu / g. From the salt spray test, we found that 2 % sodium silicate will produce rusty condition, while the amount of sodium silicate increased to more than 4 % will not rust. It can be found in the study, the more acid added, the more remarkable the effect of the phosphate coating to powder, resulting to improve the insulation resistance. Adding sodium silicate and more, have a higher insulation resistance. Permeability and quality factor in the analysis results, the preferred solution is 2 wt% phosphoric acid + 4 wt% sodium silicate, taking into account the resistance value, surface oxidation, permeability and quality factor.

並列關鍵字

Iron-based alloys ； Insulation resistance ； Electronic and magnetic properties.

參考文獻

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