KZFS12 by Schott

Obsolete Unknown Environmentally Dangerous

KZFS12 by Schott is an obsolete optical glass. It transmits from 0.35 to 2.50 µm with an nd of 1.696 and a Vd of 36.29. It has low thermal expansion (CTE of 5.18×10⁻⁶/K), below average chemical resistance, and dangerous environmental properties.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.35–2.5 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.35–2.5 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.350–2.500 µm
Optical Properties
Refractive Index (nd) 1.696
Abbe Number (Vd) 36.29
Dispersion Formula Sellmeier
Wavelength Range 0.35 — 2.5 µm
$$n(\lambda) = \sqrt{1 + \frac{1.55625\,\lambda^2}{\lambda^2 - 0.0102013} + \frac{0.239769\,\lambda^2}{\lambda^2 - 0.0469278} + \frac{0.947888\,\lambda^2}{\lambda^2 - 69.8371}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 5.18
TCE 100/300°C (10-6/K) 6.22
Thermal Conductivity (W/mK) 0.71
Heat Capacity (J/gK) 0.54
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[4.36 \times 10^{-6} + 2(1.32 \times 10^{-8})\,\Delta T + 3(-1.81 \times 10^{-11})\,\Delta T^2 + \frac{6.86 \times 10^{-7} + 2(6.81 \times 10^{-10})\,\Delta T}{\lambda - 0.253}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.836
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) 66.0
Poisson's Ratio 0.28
Knoop Hardness (kgf/mm²) 440.0
Chemical Resistance
Climatic Resistance 4
Stain Resistance 1
Acid Resistance 53
Alkali Resistance 4
Phosphate Resistance 4
Notes

inquiry glass

Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
C97-36 Corning 1.695989 36.517325
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CSBR Generic IR 1.69706 34.108015
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K-CD45 Sumita 1.6932 33.7
CD45 Sumita 1.6932 33.7
ADF405 Hoya 1.6765 37.477902
BPH40 Ohara 1.676498 37.537388
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Similar Glasses (Schott)
Glass Manufacturer nd Vd Compare
BASF13 Schott 1.69761 38.570097
KZFS7A Schott 1.68064 37.389991
N-BASF64 Schott 1.704 39.38
BASF64A Schott 1.704 39.384429
N-KZFS8 Schott 1.72047 34.7
KZFS8 Schott 1.72047 34.613955
BASF51 Schott 1.723728 38.111094
N-BASF2 Schott 1.66446 36.0
BASF2 Schott 1.66446 35.829357
BASF12 Schott 1.669979 39.200523
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