Ceramic materials have become essential due to their high durability, chemical stability, and excellent thermal stability in various advanced industries such as aerospace, automotive, and semiconductor. However, high-performance ceramic materials face limitations in commercialization due to the high cost of raw materials and complex manufacturing processes. Aluminum borate (Al₁₈B₄O₃₃) has emerged as a promising alternative due to its superior mechanical strength and thermal stability, despite its simple manufacturing process and low production cost. In this study, we propose a method for producing Al₁₈B₄O₃₃ spherical powder with increased uniformity and high flowability by controlling the particle size of B₂O₃. The content ratio of the manufactured Al18B4O33 spherical powder was Al2O3: B2O3 = 87:13, and it exhibited a 17% reduction in the Hausner ratio (1.04) and a 29% decrease in the angle of repose (23.9°) compared to pre-milling conditions, demonstrating excellent flowability.

1. Introduction 
2. Experimental 
    2.1 Al2O3/B2O3 혼합 슬러리 제작 
    2.2 Al18B4O33 구형 분말 제작 
    2.3 B2O3, Al2O3/B2O3 혼합 과립, Al18B4O33 구형 분말의 물성 분석 
3. Results and discussion 
4. Conclusion 
Funding
Conflict of Interest  
Data Availability Statement 
Author Information and Contribution 
Acknowledgement
References

• 송기호(한국세라믹기술원 엔지니어링소재센터) | Kiho Song (Engineering Ceramic Center, Korea Institute of Ceramic Engineering & Technology (KICET), Icheon 17303, Republic of Korea)
• 이상인(한국세라믹기술원 엔지니어링소재센터) | Sang in Lee (Engineering Ceramic Center, Korea Institute of Ceramic Engineering & Technology (KICET), Icheon 17303, Republic of Korea)
• 송현승(한국세라믹기술원 엔지니어링소재센터) | Hyunseung Song (Engineering Ceramic Center, Korea Institute of Ceramic Engineering & Technology (KICET), Icheon 17303, Republic of Korea)
• 안창의(한국세라믹기술원 엔지니어링소재센터) | Changui Ahn (Engineering Ceramic Center, Korea Institute of Ceramic Engineering & Technology (KICET), Icheon 17303, Republic of Korea) Corresponding author