표제지
목차
Abstract 7
Chapter 1. Introduction 12
Chapter 2. Background knowledge 16
2.1. Boron Nitride (BN) 16
2.2. h-BN의 열 특성 21
2.3. 복합체의 열전도도 23
Chapter 3. Experiment procedure 26
3.1. Pellet 제조 26
3.2. Epoxy 함침 27
3.3. Epoxy-h-BN 복합체 제작 28
3.4. 시편 미세구조 및 열특성 측정 30
3.4.1. 미세구조 30
3.4.2. 열출입 및 반응열 31
3.4.3. 열전도율 32
Chapter 4. Results and discussion 33
3.1. Epoxy 종류에 따른 함침 33
3.2. h-BN 함침에 따른 열전도도 47
3.3. h-BN 복합체의 열전도도 49
Chapter 5. Conclusion 57
Reference 59
Table 1. List of equations and remarks of frequently used classical theoretical models. 25
Table 2. Viscosity and Molecular Structure of Epoxy (Table caption은 위에) 35
Fig. 1. Simplified model of SMD LED lamp on MCPCB 13
Fig. 2. Schematic of hybridization orbital 17
Fig. 3. Phase Diagram and Molecular Model of Boron Nitride 20
Fig. 4. Schematic of impregnated h-BN pellets 29
Fig. 5. SEM images of h-BN pellets before impregnation(a) and h-BN pellets impregnated in Bisphenol A type epoxy at 25℃, 12 hours(b), 60℃, 12 hours(c) and... 38
Fig. 6. Specific heat of impregnated and unimpregnated pellets 40
Fig. 7. SEM images of h-BN pellets impregnated in Bisphenol F type epoxy at 25℃, 6 hours(a), 25℃, 12 hours(b), 60℃, 6 hours(c), and 60℃, 12 hours(d). 42
Fig. 8. Density of h-BN pellets impregnated in Bisphenol F type epoxy. 44
Fig. 9. Specific heat of h-BN pellets impregnated in Bisphenol F type epoxy. 46
Fig. 10. Thermal conductivity of h-BN pellets impregnated in Bisphenol F type epoxy. 48
Fig. 11. SEM image of h-BN granule. 50
Fig. 12. SEM images of h-BN@epoxy composites impregnated at 25℃, 6 hours(a), 25℃, 12 hours(b), 60℃, 6 hours(c), and 60℃, 12 hours(d). 52
Fig. 13. SEM images of h-BN granule@epoxy composites impregnated at 25℃, 6 hours(a), 25℃, 12 hours(b), 60℃, 6 hours(c), and 60℃, 12 hours(d). 53
Fig. 14. Thermal diffusivity of h-BN@epoxy and h-BN granule@epoxy composites. 56