목차
[표제지 등]=0,1,2
제출문=1,3,2
요약문=3,5,2
목차=5,7,2
List of Tables=7,9,2
List of Figures=9,11,2
List of Photographs=11,13,2
제1장 서론=13,15,1
제1절 연구 개발의 현황과 목적=13,15,6
제2절 연구 개발의 범위=19,21,3
제2장 금속산화물 미분체의 제조에 관한 고찰=22,24,1
제1절 연마제용 세륨산화물=22,24,16
제2절 초미립 금속산화물=38,40,7
제3절 안티모니산화물=45,47,14
제3장 고급연마제용 세륨산화물 제조=59,61,1
제1절 개요=59,61,5
제2절 황산침출법에 의한 세륨의 분리회수=63,65,11
제3절 세륨수산화물 제조=74,76,4
제4절 세륨수산화물로부터 연마제용 세륨산화물 제조=78,80,9
제4장 실리카(SiO₂) 초미분체 제조=87,89,1
제1절 개요=87,89,1
제2절 TiO₂초미분체 제조 연구결과=87,89,7
제3절 SiO₂초미분체 제조 및 특성 평가=93,95,16
제5장 난연제용 안티모니삼산화물 제조=109,111,1
제1절 개요=109,111,1
제2절 실험장치 및 방법=110,112,6
제3절 실험결과 및 고찰=116,118,7
제6장 결론=123,125,3
REFERENCES=126,128,4
Table 1.1 World market of rare earths according to their applications('Chemical Marketing Reporter', April 1995, p.18)=15,17,1
Table 1.2 Domestic imports and exports of rare earths in 1996=15,17,1
Table 2.1 Physical and chemical data of Chinese polishing powder=35,37,1
Table 2.2 Physical and chemical properties for the polishing powder of Davison Specialty Chemical Co.(Product Name:VITROX C)=35,37,1
Table 2.3 Physical and chemical properties for the polishing powder of Davison Specialty Chemical Co.(Product Name:RAREOX 14)=36,38,1
Table 2.4 Physical and chemical properties for the polishing powder of Davison Specialty Chemical Co.(Product Name:RAREOX 90)=36,38,1
Table 2.5 Physical and chemical properties for the polishing powder of Davison Specialty Chemical Co.(Product Name:X-OX)=36,38,1
Table 2.6 Physical and chemical properties for the polishing powder of Cercoa Co.(Product Name:Lensmax Z)=37,39,1
Table 2.7 Physical and chemical properties for the polishing powder of Cercoa Co.(product Name:Lensmax R)=37,39,1
Table 2.8 Fields of application on improvement of mechanical properties=44,46,1
Table 2.9 Antimony ores and properties=46,48,1
Table 2.10 Reserves of antimony ores (unit:thousand tons, metal base)=47,49,1
Table 2.11 Production of antimony concentrate in 1994 (W:not submitted)=47,49,1
Table 2.12 Example of chemical composition of antimony ores=47,49,1
Table 2.13 Demand of primary antimony in USA according to its uses=57,59,1
Table 2.14 Domestic exports and imports antimony related Products in 1996=58,60,1
Table 2.15 Domestic exports and imports of antimony trioxide in 1997=58,60,1
Table 3.1 Chemical composition of bastnasite (unit:wt%)=63,65,1
Table 3.2 Amount of total rare earth oxides(TREO) of the bastnasite roasted at different temperatures=64,66,1
Table 3.3 Chemical composition of the raffinate solution passed through ion-sieve column=73,75,1
Table 3.4 Recovery of cerium fluoride precipitate with variation of addition of H₂O₂and NH₄HF₂=75,77,1
Table 3.5 Recovery of cerium in the form of hydroxide from the cerium fluoride precipitate in NaOH solution=76,78,1
Table 3.6 Volumetric average particle size of the cerium polishing powder samples according to processing conditions=81,83,1
Table 3.7 Weight loss of the glass specimens in the polishing test according to preparation of CeO₂samples (unit:㎎)=85,87,1
Table 3.8 The properties of commercial polishing powder samples used in the experiments=85,87,1
Table 4.1 Physical properties of Tetraethoxysilane(TEOS) sample=94,96,1
Table 4.2 Operating condition for the diffusion flame=98,100,1
Table 4.3 Effect of particle size of silica powders on the S/F and B/F of EMC=107,109,1
Fig.2.1 Flowsheet of monazite treatment=23,25,1
Fig.2.2 Flowsheet of bastnasite treatment=24,26,1
Fig.2.3 Flowsheet of the preparation of glass additive and polishing powder from bastnasite=34,36,1
Fig.2.4 Schematic flowsheet of roast-reduction process=49,51,1
Fig.2.5 Schematic flowsheet of liquation process=52,54,1
Fig.3.1 Flowsheet of preparation of CeO₂from bastnasite concentrate according to sulfation method=60,62,1
Fig.3.2 Flowsheet of preparation of CeO₂from bastnasite concentrate according to oxidizing roasting followed by leaching with sulfuric acid=62,64,1
Fig.3.3 Effect of roasting temperature on the yield of leaching=65,67,1
Fig.3.4 Effect of H₂SO₄concentration on the yield of leaching=67,69,1
Fig.3.5 Effect of leaching time on the yield of leaching=67,69,1
Fig.3.6 Relationship between recovery of cerium and TREO concentration of the leached solution=71,73,1
Fig.3.7 Relationship between recovery of cerium and flowrate of the leached solution=72,74,1
Fig.3.8 Relationship between recovery of cerium and height of resin column=72,74,1
Fig.3.9 XRD curve of the cerium fluoride precipitate after calcination=76,78,1
Fig.3.10 XRD curve of the cerium hydroxide precipitate after calcination:(a) precipitated at room temperrature, (b) precipitated at 40℃=77,79,1
Fig.3.11 Flowsheet of the process for preparing CeO₂from Ce(OH)₃=79,81,1
Fig.4.1 Schematic diagram of experimental apparatus for TiO₂nanoparticles=88,90,1
Fig.4.2 Schematic drawing of experimental apparatus for the production of SiO₂nanoparticles=94,96,1
Fig.4.3 Schematic diagram of the burner composed of 5 concentric tubes=96,98,1
Fig.4.4 Temperature profiles of the diffusion flame at the condition of Table 4.2=98,100,1
Fig.4.5 Temperature profiles of the diffusion flame with the increase of Ar flow rate(1.5 I/min) at the condition of Table 4.2(이미지참조)=99,101,1
Fig.4.6 Temperature profiles of the diffusion flame with the increase of Ar flow rate(2.0 l/min) at the condition of Table 4.2(이미지참조)=99,101,1
Fig.4.7 Effect of TEOS concentration on the particle size at the condition of Table 4.2=102,104,1
Fig.4.8 Effect of TEOS concentration on the particle size (Ar for TEOS:1 I/min, air:10 l/min, H2:6 l/min, O2:15 l/min, air:40 l/min)(이미지참조)=102,104,1
Fig.5.1 Schematic diagram of the Experimental apparatus for preparation of antimony trioxide=113,115,1
Fig.5.2 X-ray diffraction peak of the antimony trioxide sample=117,119,1
Fig.5.3 Metal evaporation according to the temperature of the furnace=118,120,1
Fig.5.4 Particle size distribution of the antimony trioxide sample=119,121,1
Fig.5.5 Average particle size of the antimony trioxide sample with variation of air flow rate=120,122,1
Fig.5.6 Average particle size of the antimony trioxide sample with variation of temperature of injected air=120,122,1
Fig.5.7 Whiteness of the Sb₂O₃sample with variation of air flow rate=122,124,1
Fig.5.8 Whiteness of the Sb₂O₃sample with temperature of injected air=122,124,1
Photo 3.1 Configuration of bastnasite sample:(left) original sample, (right) after roasting=64,66,1
Photo 3.2 Experimental apparatus used in the ion sieve method=69,71,1
Photo 3.3 The cerium hydroxide powder sample=80,82,1
Photo 3.4 The cerium oxide powder sample for polishing powder=80,82,1
Photo 3.5 Shape of the CeO₂sample 1-A by SEM, (top):x500, (bottom):x5,000=82,84,1
Photo 3.6 The experimental equipement used in the polishing test=84,86,1
Photo 3.7 The glass specimen used in the polishing test=84,86,1
Photo 4.1 TEM pictures of SiO₂particles obtained from different TEOS concentrations ((a):0.98x10-5㏖/l, (b):1.38x10-4㏖/l, (c):1.88x10-4㏖/l, (d):2.50x10-4㏖/l)(이미지참조)=103,105,1
Photo 4.2 TEM pictures of SiO₂particles obtained from different TEOS concentrations ((a):0.98x10-5㏖/l, (b):1.38x10-4㏖/l, (c):1.88x10-4㏖/l)(이미지참조)=105,107,1
Photo 5.1 Sample of antimony ingot=110,112,1
Photo 5.2 Experimental apparatus for preparation of antimony trioxide=114,116,1
Photo 5.3 Antimony trioxide sample obtained through the experiment=116,118,1
Photo 5.4 Shape of the antimony thoxide sample (SEM, x10,000)=121,123,1