Li2O—Al2O3—SiO2 based crystallized glass and method for producing same
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C03C-010/12
C03B-032/02
C03C-010/00
C03C-003/097
C30B-001/02
C30B-029/18
C30B-029/34
출원번호
US-0402150
(2013-05-15)
등록번호
US-9556062
(2017-01-31)
우선권정보
JP-2012-124081 (2012-05-31)
국제출원번호
PCT/JP2013/063531
(2013-05-15)
국제공개번호
WO2013/179894
(2013-12-05)
발명자
/ 주소
Ogawa, Shuhei
Nakane, Shingo
출원인 / 주소
NIPPON ELECTRIC GLASS CO., LTD.
대리인 / 주소
Drinker Biddle & Reath LLP
인용정보
피인용 횟수 :
4인용 특허 :
2
초록▼
In a Li2O—Al2O3—SiO2 based crystallized glass using SnO2 as a substitute fining agent for As2O3 or Sb2O3, a crystallized glass having less yellow coloration is provided at low costs. The glass is a Li2O—Al2O3—SiO2 based crystallized glass comprising from 0.01 to 0.9% of SnO2 in terms of % by mass an
In a Li2O—Al2O3—SiO2 based crystallized glass using SnO2 as a substitute fining agent for As2O3 or Sb2O3, a crystallized glass having less yellow coloration is provided at low costs. The glass is a Li2O—Al2O3—SiO2 based crystallized glass comprising from 0.01 to 0.9% of SnO2 in terms of % by mass and having a content of each of As2O3 and Sb2O3 of 1,000 ppm or less as a glass composition, which has a V2O5 content of from 0.08 to 15 ppm in the glass composition.
대표청구항▼
1. A method for producing a Li2O—Al2O3—SiO2 based crystallized glass, which comprises preparing a raw material batch so as to form a glass comprising from 0.01 to 0.9% of SnO2 in terms of % by mass and having a content of each of As2O3 and Sb2O3 of 1,000 ppm or less, melting and forming the batch to
1. A method for producing a Li2O—Al2O3—SiO2 based crystallized glass, which comprises preparing a raw material batch so as to form a glass comprising from 0.01 to 0.9% of SnO2 in terms of % by mass and having a content of each of As2O3 and Sb2O3 of 1,000 ppm or less, melting and forming the batch to produce a Li2O—Al2O3—SiO2 based crystallizable glass, and subsequently subjecting the glass to a heat treatment to achieve crystallization, wherein the b* value of L*a*b* colorimetric system of CIE standard of the crystallized glass standard is from 0 to 4.5 at a thickness of 3 mm and wherein selection of raw materials and management of steps are performed so that a V2O5 content in the crystallized glass becomes from 0.08 to 15 ppm. 2. The method for producing a Li2O—Al2O3—SiO2 based crystallized glass according to claim 1, which comprises preparing the batch so as to form a glass comprising from 55 to 75% of SiO2, from 10 to 35% of Al2O3, from 1 to 10% of Li2O, from 0.2 to 5% of MgO, from 0 to 5% of ZnO, from 0 to 10% of BaO, from 0 to 4% of TiO2, from 0 to 5% of ZrO2, from 0 to 4% of P2O5, and from 0.01 to 0.9% of SnO2, in terms of % by mass, as a glass composition. 3. The method for producing a Li2O—Al2O3—SiO2 based crystallized glass according to claim 2, wherein a raw material having a V2O5 content of 50 ppm or less is used as a raw material of Al2O3. 4. The method for producing a Li2O—Al2O3—SiO2 based crystallized glass according to claim 2, wherein a raw material having a V2O5 content of 400 ppm or less is used as a raw material of MgO. 5. The method for producing a Li2O—Al2O3—SiO2 based crystallized glass according to claim 2, wherein the batch is prepared so as to form a glass comprising from 17 to 27% of Al2O3 and from 0.2 to 4% of MgO, in terms of % by mass, as a glass composition. 6. The method for producing a Li2O—Al2O3—SiO2 based crystallized glass according to claim 1, wherein melting is performed at a temperature of less than 1,750° C. 7. The method for producing a Li2O—Al2O3—SiO2 based crystallized glass according to claim 1, wherein a β-quartz solid solution is precipitated as a main crystal by a heat treatment.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (2)
Beall George H. (Big Flats NY) Echeverria Lina M. (Erwin NY) Pfitzenmaier Robert W. (Canisteo NY), Colored, opaque glass-ceramic.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.