Title:
PROCESS FOR PRODUCING ALKALI-FREE GLASS
Document Type and Number:
WIPO Patent Application WO/2007/132737
Kind Code:
A1
Abstract:
A production process by which an alkali-free glass reduced in bubble inclusion and highly homogeneous and flat can be obtained. The process for alkali-free glass production comprises melting raw glass materials comprising silica sand and a boron source and forming the melt, wherein the boron source is one which comprises 10-100 mass% boric anhydride (in terms of B2O3) based on the boron source (in terms of B2O3).
Inventors:
YAMAMOTO MINEKO (JP)
HAYASHI YASUO (JP)
KUSHITANI HIDEKI (JP)
HAYASHI YASUO (JP)
KUSHITANI HIDEKI (JP)
Application Number:
PCT/JP2007/059683
Publication Date:
November 22, 2007
Filing Date:
May 10, 2007
Export Citation:
Assignee:
ASAHI GLASS CO LTD (JP)
YAMAMOTO MINEKO (JP)
HAYASHI YASUO (JP)
KUSHITANI HIDEKI (JP)
YAMAMOTO MINEKO (JP)
HAYASHI YASUO (JP)
KUSHITANI HIDEKI (JP)
International Classes:
C03C1/00; C03B3/02; C03C3/091; G02F1/1333
Foreign References:
| JPH11180726A | 1999-07-06 | |||
| JPH09156953A | 1997-06-17 | |||
| JPH1072237A | 1998-03-17 | |||
| JPH11180727A | 1999-07-06 | |||
| JP2000143280A | 2000-05-23 |
Attorney, Agent or Firm:
SENMYO, Kenji et al. (SIA Kanda Square17, Kanda-konyacho, Chiyoda-ku, Tokyo 35, JP)
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