[표제지 등]
summary
List of Table
List of Figure
List of Photographs
칼라
목차
제1장 서론 11
제1절 연구 개발의 현황과 목적 11
제2절 연구 개발의 범위 15
제2장 금속산화물 미분체의 제조에 관한 고찰 19
제1절 초미립 금속산화물 제조 19
제2절 안티모니산화물 제조 26
제3장 실리카(SiO₂) 초미분체 제조 43
제1절 개요 43
제2절 SiO₂초미분체 제조 및 특성 평가 43
제3절 실리카 초미분체의 응용기술 개발 66
제4장 난연제용 삼산화안티모니 제조 91
제1절 시료 91
제2절 실험 장치 및 방법 92
제3절 실험결과 및 고찰 100
제5장 결론 103
REFERENCES 106
판권지 109
[title page etc.]
Contents
Chapter 1. Introduction 11
Section 1. Status and purpose of the research 11
Section 2. Content of the research 15
Chapter 2. Survey on preparation of metal oxide fine powder 19
Section 1. Preparation of ultrafine metal oxide 19
Section 2. Preparation of antimony oxide 26
Chapter 3. Preparation of ultrafine SiO₂ powder 43
Section 1. Overview 43
Section 2. Synthesis and characterization of silica powder 43
Section 3. Application of ultrafine silica powder 66
Chapter 4. Preparation of Antimonytrioxide powder 91
Section 1. Experimental Materials 91
Section 2. Experimental Apparatus and Procedure 92
Section 3. Experimental Results and Discussion 100
Chapter 5. Conclusions 103
copyright 109
Table 2.1. Fields of application on improvement of mechanical properties. 26
Table 2.2. Antimony ores and properties. 28
Table 2.3. Reserves of antimony ores (unit: thousand tons, metal base). 29
Table 2.4. Production of antimony concentrate in 1994 (W: not submitted). 30
Table 2.5. Example of chemical composition of antimony ores. 30
Table 2.6. Demand of primary antimony in USA according to its uses. 40
Table 2.7. Domestic exports and imports antimony related products in 1996. 41
Table 2.8. Domestic exports and imports of antimonytrioxide in 1997. 42
Table 3.1. Physical properties of Tetraethoxysilane(TEOS) 44
Table 3.2. Operating condition for the diffusion flame. 49
Table 3.3. Effect of particle size of silica powders on the S/F and B/F of EMC. 64
Table 3.4. Ocean accidents & damage 67
Table 3.5. Ocean accidents of above 100kl in oil-spilling 67
Table 3.6. Classifications of oil-absorbent 71
Table 3.7. Domestic discharges and estimations of flyash. 71
Table 3.8. Domestic uses for flyash in 1995. 71
Table 3.9. Typical Chemical analysis of various flyash. 72
Table 3.10. Specification of hydrophobic silica. 73
Table 3.11. Test of major organic oil-absorbent materials 83
Fig.2.1. Schematic flowsheet of roast-reduction process 32
Fig.2.2. Schematic flowsheet of liquation process. 35
Fig.3.1. Schematic drawing of experimental apparatus for the production of SiO₂ nanoparticles. 45
Fig.3.2. Schematic diagram of the burner composed of 5 concentric tubes 47
Fig.3.3. Temperature profiles of the diffusion flame at the condition of Table 3. 2. 51
Fig.3.4. Temperature profiles of the diffusion flame with the increase of Ar flow rate(1.5 l/min) at the condition of Table 3. 2. 52
Fig.3.5. Temperature profiles of the diffusion flame with the increase of Ar flow rate(2.0 l/min) at the condition of Table 3. 2. 53
Fig.3.6. Effect of TEOS concentration on the particle size at the condition of Table 3. 2. 55
Fig.3.7. Effect of TEOS concentration on the particle size (Ar for TEOS: 1 l/min, air: 10 l/min, H₂:6 l/min, O₂: 15 l/min, air: 40 l/min). 58
Fig.3.8. Process flow diagram of oil-absorbenting inorganic powders manufacturing and wasted oil recovery from flyash. 74
Fig.3.9. Floating intensity VS. Wt% of hydrophobic silica 79
Fig.3.10. Floating intensity with blending of polydimethylsiloxane 80
Fig.3.11. Amount of oil-absorbing VS.various organic absorbing materials(materilas) 84
Fig.3.12. Amount of oil-absorbing VS.classifying of oils 85
Fig.3.13. Oil-spilling on the sea after sinking of oil-tanker 89
Fig.3.14. Recovery boat 89
Fig.4.1. Schematic diagram of the Experimental apparatus for preparation of antimony trioxide. 95
Fig.4.2. X-ray diffraction peak of the antimony trioxide sample. 101
Fig.4.3. Particle distribution of the antimony trioxide sample. 102
Photo 3.1. TEM pictures of SiO₂ particles obtained from different TEOS concentrations ((a): 0.98×10-5 mol/l, (b): 1.38×10-4 mol/l, (c): 1.88×10-4 mol/l, (d): 2.50×10-4 mol/l). ─100nm(이미지참조) 57
Photo 3.2. TEM pictures of SiO₂ particles obtained from different TEOS concentrations ((a): 0.98×10-5 mol/l,(b) :1.38×10-4 mol/l, (c): 1.88×10-4 mol/l).(이미지참조) 61
Photo 3.3. Morphology of coated flyash with blending of different additives 78
Photo 3.4. Tilted apparatus for measuring of oil-absorbing 86
Photo 3.5. Oil-spilled on the water 86
Photo 3.6. Oil-absorbing materials sprayed on the oil-spilled water 87
Photo 3.7. Clean water removed from the different contaminated oil 87
Photo 3.8. Sludge recovered from the different contaminated oil 87
Photo 3.9. SEM of fired flyash after absorbing contaminated oil 90
Photo 3.10. SEM of original flyash 90
Photo 4.1. Sample of antimony ingot. 91
Photo 4.2. the Experimental apparatus for preparation of antimony trioxide. 96
Photo 4.3. Bag filter and suction blower used in the experiment. 97
Photo 4.4. Antimony sample before charged into the furnace (top), and after melting in a magnesia crucible(cricible) (bottom). 99
Photo 4.5. Antimony trioxide sample obtained through the experiment. 100
Photo 4.6. Shape of the antimony trioxide sample (SEM, x5,000). 102