JP2016040229A5

JP2016040229A5 -

Info

Publication number: JP2016040229A5
Application number: JP2015201065A
Authority: JP
Filing date: 2015-10-09
Publication date: 2016-11-24

Claims

The content of P ₂ O ₅ is 7 to 40 mol%,
The content of TiO ₂ is 1 mol% or more,
Glass in which the value of βOH represented by the following formula (1) satisfies the relationship represented by the following formula (2).
βOH = − [ln (B / A)] / t (1)
βOH ≧ 0.4891 × ln (1 / HR) +2.48 (2)
[In formula (1), t represents the thickness (mm) of the glass used for measurement of external transmittance, and A represents external transmission at a wavelength of 2500 nm when light is incident on the glass in parallel with the thickness direction. B represents the external transmittance (%) at a wavelength of 2900 nm when light is incident on the glass in parallel to the thickness direction. In formula (2), HR represents the total amount (mol%) of the content of each component of TiO ₂ , Nb ₂ O ₅ , WO ₃ and Bi ₂ O _{3 in} the glass. In the formulas (1) and (2), ln is a natural logarithm. ]

P _２2 O _５5 , SiO _２2 , B _２2 O _３3 TiO _２2 , Nb _２2 O _５5 , WO _３3 , Bi _２2 O _３3 MgO, CaO, SrO, BaO, ZnO, Li _２2 O, Na _２2 O, K _２2 O, Al _２2 O _３3 , ZrO _２2 , GeO _２2 , TeO _２2 , Sb _２2 O _３3 The glass of Claim 1 whose total content of is 90 mol% or more.

The glass of Claim 1 or 2 whose glass transition temperature Tg is 541 degreeC or more.

The glass according to any one of claims 1 to 3, wherein the noble metal content is 4 ppm or less.

The glass in any one of Claims 1-4 whose refractive index nd is 1.75 or more.

Said P in mol% display _２2 O _５5 The content of B is B _２2 O _３3 The glass in any one of Claims 1-5 larger than content of.

Nb _２2 O _５5 The glass in any one of Claims 1-6 whose content of is 5 mol% or more.

P _２2 O _５5 The glass in any one of Claims 1-7 whose content of is 35 mol% or less.

In mol%, SiO _２2 Content of 0% or more, P _２2 O _５5 The glass in any one of Claims 1-8 which is 0.8 times or less of content (M).

The glass in any one of Claims 1-9 whose sum total content of BaO, SrO, CaO, MgO, and ZnO is 0-32 mol%.

Bi _２2 O _３3 The glass in any one of Claims 1-10 whose content of is 0-35 mol%.

P _２2 O _５5 , SiO _２2 , B _２2 O _３3 TiO _２2 , Nb _２2 O _５5 , WO _３3 , Bi _２2 O _３3 MgO, CaO, SrO, BaO, ZnO, Li _２2 O, Na _２2 O, K _２2 O, Al _２2 O _３3 , ZrO _２2 , GeO _２2 , TeO _２2 , Sb _２2 O _３3 The glass in any one of Claims 1-11 whose total content of is 95 mol% or more.

GeO _２2 The glass in any one of Claims 1-12 whose content of is 0-1 mol%.

TeO _２2 The glass in any one of Claims 1-13 whose content of is 0-1 mol%.

Sb _２2 O _３3 The glass in any one of Claims 1-14 whose content of is 0 ppm or more and less than 1000 ppm.