As a case study on aspect ratio behavior, Kaolin, zeolite, TiO2, pozzolan and diatomaceous earth minerals are investigated using wet milling with 0.3 pai media. The grinding process using small media of 0.3 pai is suitable for current work processing applications. Primary particles with average particle size distribution D50, ~6 μm are shifted to submicron size, D50 ~0.6 μm, after grinding. Grinding of particles is characterized by various size parameters such as sphericity as geometric shape, equivalent diameter, and average particle size distribution. Herein, we systematically provide an overview of factors affecting the primary particle size reduction. Energy consumption for grinding is determined using classical grinding laws, including Rittinger's and Kick's laws. Submicron size is obtained at maximum frictional shear stress. Alterations in properties of wettability, heat resistance, thermal conductivity, and adhesion increase with increasing particle surface area. In the comparison of the aspect ratio of the submicron powder, the air heat conductivity and the total heat release amount increase 68 % and 2 times, respectively.

Abstracts
 1. 서 론
 2. 실험방법
 3. 결과 및 고찰
 4. 결 론
 References

• 최진삼(울산대학교 첨단소재공학부) | Jinsam Choi (School of Advanced Materials Engineering, University of Ulsan) Corresponding author
• 박규열(울산대학교 기계공학부) | Kyu Yeol Park (School of Mechanical Engineering, University of Ulsan)
• 공영민(울산대학교 첨단소재공학부) | Young-Min Kong (School of Advanced Materials Engineering, University of Ulsan) Corresponding author