雲母的晶面間距接近奈米層級，甚為符合近年來複合材料開發之大方向，雲母具有優良的化學、物理性質且其化性安定、耐高溫、抗紫外線、折射度高、絕緣性佳，再加上自給充足，實為一種值得深入探討研究發展之礦物材。但雲母層間電荷高，吸引力強，不具膨潤性，因此粒徑縮減及其進一步之剝離相當不易進行，故利用適當的物理與化學方式進行雲母粒徑縮減和減少層間鍵結力以利後續剝離、插層作業為本研究目的。
在物理研磨方面，以相同種類、粒徑之磨體，在相同礦漿濃度的研磨條件下，攪拌研磨機之粉碎效果明顯優於球磨機。而利用效率較好的攪拌研磨機進行粒徑縮減時，高礦漿濃度(重量百分比35%)在初時研磨效率較好，但隨著研磨時間增加黏度也大幅提升，故在攪磨一段時間後低礦漿濃度(重量百分比10%)研磨效率反而較好。另外，在相同濃度下，粒徑大小隨著攪磨時間增長而縮小，但攪磨到48hr 後攪磨的效率便無法提升，而層間的鉀離子也會因雲母結構被破壞後而被釋放出來，但釋放出來的鉀離子為量不多，最多佔原礦的0.53%。
在化學離子置換方面，層間鉀離子被鋰離子交換後再微幅縮減雲母粒徑，且其CEC 值可由原來之3.42 meq/100g 大幅提升至
118.86meq/100g，CEC 值的提升對於往後複合材料之製作將會有很大的幫助。而雲母粒徑大小也與層間的鉀離子置換性有關連，由本研究顯示粒徑越小之雲母其鉀離子置換性越好，其層間鉀離子的殘留量可由原礦的48.15%下降至35.90%。

Muscovite is close to nano-sized layer structure, accord with general orientation that composite develops in recent years, in addition to having fine chemistry, physical property, stability and excellent properties in
anti-ultraviolet, anti-static, heat resistance,electricity insulation. It is worth probing into the mineral material which for one studies thoroughly.But electric charge is high among the muscovite layer. Bond strength is strong, so particle reducing and further exfoliating is quite difficult to carry on. This research purpose is utilizing proper physics and chemical way to reduce muscovite particle size and bond strength among the layer.
The respect in physics grinding: under the similar grinding condition with the same concentration of slurry and same type of media with identical diameter, the milling efficiency of the “attrition mill” is obviously superior to “ball mill”.And using the “attrition mill” having better efficiency to carry on particle reducing, the efficiency of high concentration of slurry (weight
percentage is 35%) is better at the very start. But with grinding time increasing viscosity raises quickly, so the efficiency of low concentration of slurry (weight percentage is 10%) is better contrariously. In addition,
under the same concentration of slurry, particle size will reduce with grinding time increasing, but the efficiency won,t increase after grinding 48hr.The potassium ions of layer can be released after destroying, but that is little quantity, accounts for 0.53% of the original ore at most.
The respect in the chemical ion replacing: particle size can be reduced after potassium ion exchanging with lithium ion in the layer. Its CEC value can be improved from original 3.42 meq/100g to 118.86meq/100g. And the muscovite particle size is related to potassium ion replacement among layer. Based on the test results, the particle size will be smaller if the finer potassium ion replacement of muscovite. The remnant amount of the potassium ion among layer can drop to 35.90% from 48.15% of the original ore.

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