The present invention relates to a silica glass member having a plurality of pores, in which some or all of the plurality of pores are communication pores, and S/S0 is 1.5 or more. S: surface area obtained by a BET method for a 40 mm8 mm0.5 mm sample cut from the silica glass member; and S0: geometric surface area obtained based on external dimensions of the sample.

A strengthened glass article (100), such as a substrate for a p-Si based transistors, includes first and second glass cladding layers (104, 106) and a glass core layer (102) disposed therebetween. A coefficient of thermal expansion [CTE] of each cladding layer (104, 106), which can be made of the same glass, is at least 110.sup.7 C..sup.1 less than that of the core layer (102). Each of the core and cladding layers has a strain point less than 700 C. A compaction of the glass article (100) is at most about 20 ppm [see FIG. 1]. A method includes forming a glass article and/or heating a glass article to a first temperature of at least about 400 C. The glass article has a glass core layer (102) and a glass cladding layer (104, 106) adjacent to the core layer. The glass article is maintained at a temperature within a range of from 400 C. to 600 C. for a holding period from 30 to 90 minutes and subsequently cooled to a temperature of at most 50 C. over a cooling period from 30 seconds to 5 minutes. The glass article (100) for heat strengthening may have been produced by the fusion overflow down draw process, e.g. as depicted in FIG. 3.

A strengthened glass article (100), such as a substrate for a p-Si based transistors, includes first and second glass cladding layers (104, 106) and a glass core layer (102) disposed therebetween. A coefficient of thermal expansion [CTE] of each cladding layer (104, 106), which can be made of the same glass, is at least 110.sup.7 C..sup.1 less than that of the core layer (102). Each of the core and cladding layers has a strain point less than 700 C. A compaction of the glass article (100) is at most about 20 ppm [see FIG. 1]. A method includes forming a glass article and/or heating a glass article to a first temperature of at least about 400 C. The glass article has a glass core layer (102) and a glass cladding layer (104, 106) adjacent to the core layer. The glass article is maintained at a temperature within a range of from 400 C. to 600 C. for a holding period from 30 to 90 minutes and subsequently cooled to a temperature of at most 50 C. over a cooling period from 30 seconds to 5 minutes. The glass article (100) for heat strengthening may have been produced by the fusion overflow down draw process, e.g. as depicted in FIG. 3.

[Object] To provide a means manufacturing a medical vial which contains a Type IA borosilicate glass as the raw material and in which the elution amount of silica into a high ionic strength solution decreases to be equal to or less than the silica elution amount in a Type IB borosilicate glass.

[Solution] A method for manufacturing a medical vial is a method for manufacturing a medical vial including a fire blast process of applying a flame ejected from a point burner to a deteriorated layer generated on the inner surface of a vial, in which the vial is molded from a glass tube containing a Type IA borosilicate glass as the raw material and the molar ratio of oxides contained in the borosilicate glass satisfies =0.230.02 in =[(Na.sub.2O+K.sub.2O)Al.sub.2O.sub.3]/B.sub.2O.sub.3 and satisfies =7.50.5 in =B.sub.2O.sub.3/Al.sub.2O.sub.3.

[Object] To provide a means manufacturing a medical vial which contains a Type IA borosilicate glass as the raw material and in which the elution amount of silica into a high ionic strength solution decreases to be equal to or less than the silica elution amount in a Type IB borosilicate glass.

[Solution] A method for manufacturing a medical vial is a method for manufacturing a medical vial including a fire blast process of applying a flame ejected from a point burner to a deteriorated layer generated on the inner surface of a vial, in which the vial is molded from a glass tube containing a Type IA borosilicate glass as the raw material and the molar ratio of oxides contained in the borosilicate glass satisfies =0.230.02 in =[(Na.sub.2O+K.sub.2O)Al.sub.2O.sub.3]/B.sub.2O.sub.3 and satisfies =7.50.5 in =B.sub.2O.sub.3/Al.sub.2O.sub.3.

[Object] To provide a means manufacturing a medical glass container with less generation of a crack. [Solution] A method for manufacturing a medical glass container includes a first process of moving the tip of an ignited point burner 30 from a standby position where a flame 31 does not contact a vial 10 to a position where the tip of the ignited point burner 30 faces an opening 16 in the outside of the vial 10, a second process of inserting the tip of the point burner 30 into an internal space 14 of the vial 10, a third process of applying the flame 31 to an inner surface 15 of the vial 10 while holding the tip of the point burner 30 in the internal space 14, a fourth process of moving the tip of the point burner 30 to the outside from the internal space 14, and a fifth process of moving the tip of the point burner 30 from the position where the tip of the point burner 30 faces the opening 16 to the standby position. At least in the second process and the fourth process, the flame 31 having heating power weaker than the heating power of the flame 31 of the point burner 30 applied to the inner surface of the vial 10 in the third process is ejected from the point burner 30.

[Object] To provide a means manufacturing a medical glass container with less generation of a crack. [Solution] A method for manufacturing a medical glass container includes a first process of moving the tip of an ignited point burner 30 from a standby position where a flame 31 does not contact a vial 10 to a position where the tip of the ignited point burner 30 faces an opening 16 in the outside of the vial 10, a second process of inserting the tip of the point burner 30 into an internal space 14 of the vial 10, a third process of applying the flame 31 to an inner surface 15 of the vial 10 while holding the tip of the point burner 30 in the internal space 14, a fourth process of moving the tip of the point burner 30 to the outside from the internal space 14, and a fifth process of moving the tip of the point burner 30 from the position where the tip of the point burner 30 faces the opening 16 to the standby position. At least in the second process and the fourth process, the flame 31 having heating power weaker than the heating power of the flame 31 of the point burner 30 applied to the inner surface of the vial 10 in the third process is ejected from the point burner 30.

A cassette for loading glass includes a first frame extending in a first direction, a second frame spaced apart from the first frame in a second direction intersecting the first direction, a first support coupled to the first frame, and a second support coupled to the second frame. A plurality of first grooves are defined in the first support, the plurality of first grooves are spaced apart from each other in the first direction, each of the plurality of first grooves extends in a third direction intersecting the first direction and the second direction, and the first support includes a first protrusion protruding from an inner surface of each of the plurality of first grooves.

A cassette for loading glass includes a first frame extending in a first direction, a second frame spaced apart from the first frame in a second direction intersecting the first direction, a first support coupled to the first frame, and a second support coupled to the second frame. A plurality of first grooves are defined in the first support, the plurality of first grooves are spaced apart from each other in the first direction, each of the plurality of first grooves extends in a third direction intersecting the first direction and the second direction, and the first support includes a first protrusion protruding from an inner surface of each of the plurality of first grooves.

A glass including silica and titania is disclosed. An average hydroxyl concentration of a plurality segments of the glass is in a range from about 20 ppm to about 450 ppm, an average titania concentration of the plurality of segments is in a range from about 6 wt. % to about 12 wt. %, and each segment of the plurality of segments has a length of about 12.7 mm, a width of about 12.7 mm, and a height of about 7.62 mm. The hydroxyl concentration of each segment is measured using a Fourier transform infrared spectroscopy in transmission, the refractive index is measured using an optical interferometer with a 633 nm operating wavelength and a resolution of 270 microns270 microns pixel size, and the average titania concentration is determined based upon the measured refractive index.