KR102123925B1 - 기공 함유 불투명 석영 유리의 제조 방법 - Google Patents
기공 함유 불투명 석영 유리의 제조 방법 Download PDFInfo
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 61
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Classifications
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
- C03B19/10—Forming beads
- C03B19/108—Forming porous, sintered or foamed beads
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
- C03B19/06—Other methods of shaping glass by sintering, e.g. by cold isostatic pressing of powders and subsequent sintering, by hot pressing of powders, by sintering slurries or dispersions not undergoing a liquid phase reaction
- C03B19/066—Other methods of shaping glass by sintering, e.g. by cold isostatic pressing of powders and subsequent sintering, by hot pressing of powders, by sintering slurries or dispersions not undergoing a liquid phase reaction for the production of quartz or fused silica articles
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B20/00—Processes specially adapted for the production of quartz or fused silica articles, not otherwise provided for
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/06—Glass compositions containing silica with more than 90% silica by weight, e.g. quartz
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2201/00—Type of glass produced
- C03B2201/02—Pure silica glass, e.g. pure fused quartz
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2201/00—Glass compositions
- C03C2201/02—Pure silica glass, e.g. pure fused quartz
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2204/00—Glasses, glazes or enamels with special properties
- C03C2204/04—Opaque glass, glaze or enamel
- C03C2204/06—Opaque glass, glaze or enamel opacified by gas
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
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- Manufacturing & Machinery (AREA)
- Dispersion Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Silicon Compounds (AREA)
- Glass Melting And Manufacturing (AREA)
Abstract
Description
도 1은 불투명 석영 유리를 생산하기 위한 본 발명에 따른 절차를 설명하기 위해 사용된 흐름도이고,
도 2는 다양한 뱃치(batch)에 대한 과립의 비표면적의 곡선을 갖는 다이어그램이며,
도 3은 분쇄 전에 부분 치밀화된 분무 과립의 현미경 사진이고,
도 4는 분쇄 후에 부분 치밀화된 분무 과립의 SEM 사진이다.
Claims (16)
- 기공 함유 불투명 석영 유리의 제조 방법으로서,
(a) 비정질의 합성 생성된 SiO2 일차 입자의 응집에 의해 다공성 SiO2 과립 입자를 생성하는 단계,
(b) 상기 다공성 SiO2 과립 입자를 열적 치밀화하여 부분 치밀화된 SiO2 과립 입자를 형성하는 단계,
(c) 분산 액체 및 이 분산 액체에 분산되는 부분 치밀화된 SiO2 과립 입자를 함유하는 분산액을 형성하는 단계,
(d) 상기 분산액 내의 부분 치밀화된 SiO2 과립 입자의 적어도 일부를 분쇄하여 분쇄된 SiO2 과립 입자를 함유하는 슬립(slip)을 형성하는 단계,
(e) 상기 슬립을 성형체로 성형하고 분산 액체를 제거하여 그린 밀도(green density) ρG를 갖는 다공성 SiO2 그린 바디(green body)를 형성하는 단계, 및
(f) 상기 다공성 SiO2 그린 바디를 기공 함유 불투명 석영 유리로 소결하는 단계
를 포함하고, 여기서
(i) 단계 (b)의 열적 치밀화 동안에는, BET 수착 측정에 의해 측정된 0.025 내지 2.5 m2/g 범위의 비표면적 BET-(A)를 갖는 부분 치밀화된 SiO2 과립 입자가 생성되고,
(ii) 단계 (d)의 분쇄 동안에는, BET 수착 측정에 의해 측정된 4 내지 10 m2/g 범위의 비표면적 BET-(B)를 갖는 분쇄된 SiO2 과립 입자가 생성되는 것인 기공 함유 불투명 석영 유리의 제조 방법. - 제1항에 있어서, 열적 치밀화 동안에는, BET 수착 측정에 의해 측정된 0.8 m2/g 미만의 비표면적 BET-(A)를 갖는 부분 치밀화된 SiO2 과립 입자가 생성되는 것인 제조 방법.
- 제1항에 있어서, 단계 (d)에 따른 분쇄 전에 다공성 SiO2 과립 입자는 800℃ 내지 1300℃ 범위의 온도에서 부분 치밀화되는데, 상기 부분 치밀화된 SiO2 과립 입자가 BET 수착 측정에 의해 측정된 ≤ 0.25 m2/g의 미세기공 비표면적을 갖도록 부분 치밀화되는 것인 제조 방법.
- 제1항에 있어서, 단계 (d)에 따른 분쇄 전에 다공성 SiO2 과립 입자는 800℃ 내지 1300℃ 범위의 온도에서 부분 치밀화되는데, 상기 부분 치밀화된 SiO2 과립 입자가 BET 수착 측정에 의해 측정된 ≤ 0.1 m2/g의 미세기공 비표면적을 갖도록 부분 치밀화되는 것인 제조 방법.
- 제1항에 있어서, 상기 분쇄된 SiO2 과립 입자는 D10 값 D10(B) < 5 μm 및 D90 값 D90(B) < 50 μm에 의해 정의된 최종 입자 크기 분포를 갖는 것인 제조 방법.
- 제5항에 있어서, 상기 분쇄된 SiO2 과립 입자는 D10 값 D10(A) > 15 μm 및 D90 값 D90(A) > 105 μm에 의해 정의된 초기 입자 크기 분포로 분산액에 분산되는 것인 제조 방법.
- 제1항에 있어서, 5 μm 초과의 입자 크기를 갖는 분쇄된 SiO2 입자 중 80% 이상이 파편(splintery) 형태를 갖는 것인 제조 방법.
- 제7항에 있어서, 5 μm 초과의 입자 크기를 갖는 분쇄된 SiO2 입자 중 90% 이상이 파편 형태를 갖는 것인 제조 방법.
- 제1항에 있어서, 성형체로 성형되는 동안 슬립은 70% 이상의 중량 백분율로 SiO2 입자를 함유하는 것인 제조 방법.
- 제1항에 있어서, 성형체로 성형되는 동안 슬립은 75% 이상의 중량 백분율로 SiO2 입자를 함유하는 것인 제조 방법.
- 제1항에 있어서, 성형체로 성형되는 동안 슬립은 5 μm 미만의 입자 크기에서 제1 최대값 및 20 μm 초과의 입자 크기에서 제2 최대값을 갖는 다중모드(multimodal) 입자 크기 분포를 갖는 것인 제조 방법.
- 제1항에 있어서, 0.7 내지 1 g/cm3 범위의 벌크 밀도를 갖는 다공성 SiO2 과립 입자가 생성되는 것인 제조 방법.
- 제1항에 있어서, 부분 치밀화는 염소 함유 분위기에서 수행되는 것인 제조 방법.
- 제1항에 있어서, 단계 (e)에 따라 성형체로 성형되기 전에 슬립은 진공에 노출되는 것인 제조 방법.
- 제1항에 있어서, 다공성 SiO2 그린 바디의 그린 밀도가 1.6 ≤ ρG ≤ 1.9 g/cm3 범위의 값 ρG로 설정되는 것인 제조 방법.
- 제1항에 있어서, 단계 (a)에 따른 다공성 SiO2 과립 입자의 생성은 분무 과립화에 의해 수행되는 것인 제조 방법.
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