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Schott Nextrema® 724-3 Glass Ceramic

Category Ceramic , Glass , Glass Ceramic
Manufacturer Schott North America
Trade Name Nextrema®
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Schott Nextrema® 724-3 Glass Ceramic.pdf
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Material Notes:
The NEXTREMA® family of glass-ceramics combines the glossy appearance of glass with exceptional thermal, chemical, optical and mechanical properties such as:Very low coefficient of linear thermal expansionExcellent temperature and thermal shock resistanceHigh transmission in infrared range and unique visible light transmission profiles with different specific gradesExcellent chemical resistanceHigh mechanical strength technical data presented herein are typical averages.Manufacturer Data Sheet
Physical Properties Metric English Comments
Density 2.54 g/cc
0.0918 lb/in³
Porosity 0.000 %
0.000 %
ISO 9385
Mechanical Properties Metric English Comments
Knoop Microhardness 570
570
HK <sub>0.1 / 20</sub>; ISO 9385
Modulus of Elasticity 93.0 GPa
13500 ksi
ASTM C-1259
Flexural Strength 135 MPa
19600 psi
Bending s<sub>bB</sub>; DIN EN 1288, Part 5, R45
Poissons Ratio 0.250
0.250
ASTM C-1259
Thermal Properties Metric English Comments
CTE, linear -0.560 µm/m-°C

@Temperature -50.0 - 100 °C
 -0.311 µin/in-°F

@Temperature -58.0 - 212 °F
-0.540 µm/m-°C

@Temperature 0.000 - 50.0 °C
 -0.300 µin/in-°F

@Temperature 32.0 - 122 °F
-0.280 µm/m-°C

@Temperature 20.0 - 300 °C
 -0.156 µin/in-°F

@Temperature 68.0 - 572 °F
0.130 µm/m-°C

@Temperature 300 - 700 °C
 0.0722 µin/in-°F

@Temperature 572 - 1290 °F
Specific Heat Capacity 0.800 J/g-°C

@Temperature 20.0 - 100 °C
 0.191 BTU/lb-°F

@Temperature 68.0 - 212 °F
Thermal Conductivity 1.60 W/m-K

@Temperature 90.0 °C
 11.1 BTU-in/hr-ft²-°F

@Temperature 194 °F
 DIN 51936, ASTM E 1461-01
Maximum Service Temperature, Air 560 °C

@Time 1.80e+7 sec
 1040 °F

@Time 5000 hour
 Inhomogeneous Heating
710 °C

@Time 1.80e+7 sec
 1310 °F

@Time 5000 hour
 Homogeneous Heating
750 °C

@Time 3600 sec
 1380 °F

@Time 1.00 hour
 Inhomogeneous Heating
925 °C

@Time 3600 sec
 1700 °F

@Time 1.00 hour
 Homogeneous Heating
Optical Properties Metric English Comments
Refractive Index 1.5415

@Wavelength 656.3 nm
 1.5415

@Wavelength 656.3 nm
1.542

@Wavelength 643.8 nm
 1.542

@Wavelength 643.8 nm
1.5445

@Wavelength 587.6 nm
 1.5445

@Wavelength 587.6 nm
1.5468

@Wavelength 546.1 nm
 1.5468

@Wavelength 546.1 nm
1.5513

@Wavelength 486.1 nm
 1.5513

@Wavelength 486.1 nm
1.5518

@Wavelength 180 nm
 1.5518

@Wavelength 180 nm
1.5566

@Wavelength 435.8 nm
 1.5566

@Wavelength 435.8 nm
Transmission, Visible 68.0 %

@Thickness 4.00 mm,
Wavelength 400 nm
 68.0 %

@Thickness 0.157 in,
Wavelength 400 nm
87.0 %

@Thickness 4.00 mm,
Wavelength 600 nm
 87.0 %

@Thickness 0.157 in,
Wavelength 600 nm
90.0 %

@Thickness 4.00 mm,
Wavelength 700 nm
 90.0 %

@Thickness 0.157 in,
Wavelength 700 nm
IR Transmittance 85.0 %

@Thickness 4.00 mm,
Wavelength 2500 nm
 85.0 %

@Thickness 0.157 in,
Wavelength 2500 nm
88.0 %

@Thickness 4.00 mm,
Wavelength 1600 nm
 88.0 %

@Thickness 0.157 in,
Wavelength 1600 nm
89.0 %

@Thickness 4.00 mm,
Wavelength 1000 nm
 89.0 %

@Thickness 0.157 in,
Wavelength 1000 nm
UV Transmittance 0.000 %

@Wavelength <=350 nm,
Thickness 4.00 mm
 0.000 %

@Wavelength <=350 nm,
Thickness 0.157 in
Electrical Properties Metric English Comments
Volume Resistivity 200000 ohm-cm

@Temperature 350 °C
 200000 ohm-cm

@Temperature 662 °F
 DIN 52326
4.00e+6 ohm-cm

@Temperature 250 °C
 4.00e+6 ohm-cm

@Temperature 482 °F
 DIN 52326
Dielectric Constant 7.80

@Frequency 1.00e+6 Hz,
Temperature 25.0 °C
 7.80

@Frequency 1.00e+6 Hz,
Temperature 77.0 °F
Dielectric Loss Index 0.0190

@Frequency 1.00e+6 Hz,
Temperature 25.0 °C
 0.0190

@Frequency 1.00e+6 Hz,
Temperature 77.0 °F
Chemical Properties Metric English Comments
Acid Class, SR 2.00
2.00
DIN 12116
Alkali Class, AR 1.00
1.00
ISO 695
Descriptive Properties Value Comments
Abbé Value 55.64
546.1 nm
55.89
587.6 nm
Acoustical Characteristic, vlong. 6600 m/s
Appearance Transparent
Color Slight Amber Hue
Hydrolytic Resistance HGB 1
DIN ISO 719
tk100(°C) 175
specific electric volume resistivity of 10<sup>8</sup> O·cm
Thermal Shock Resistance (TSR) 820°C
Resists cold water without cracking
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