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Schott Nextrema® 724-5 Glass Ceramic

Category Ceramic , Glass , Glass Ceramic
Manufacturer Schott North America
Trade Name Nextrema®
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Schott Nextrema® 724-5 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 2.51 g/cc
0.0907 lb/in³
Porosity 0.000 %
0.000 %
ISO 9385
Mechanical Properties Metric English Comments
Knoop Microhardness 625
625
HK <sub>0.1 / 20</sub>; ISO 9385
Modulus of Elasticity 85.0 GPa
12300 ksi
ASTM C-1259
Flexural Strength 115 MPa
16700 psi
Bending s<sub>bB</sub>; DIN EN 1288, Part 5, R45
Poissons Ratio 0.260
0.260
ASTM C-1259
Thermal Properties Metric English Comments
CTE, linear 0.560 µm/m-°C

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

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

@Temperature 300 - 700 °C
 0.700 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 550 °C

@Time 1.80e+7 sec
 1020 °F

@Time 5000 hour
 Inhomogeneous Heating
>= 550 °C

@Time 1.80e+7 sec
 >= 1020 °F

@Time 5000 hour
 Homogeneous Heating
>= 650 °C

@Time 3600 sec
 >= 1200 °F

@Time 1.00 hour
 Homogeneous Heating
650 °C

@Time 3600 sec
 1200 °F

@Time 1.00 hour
 Inhomogeneous Heating
Optical Properties Metric English Comments
Transmission, Visible 0.000 %

@Thickness 4.00 mm,
Wavelength 400 nm
 0.000 %

@Thickness 0.157 in,
Wavelength 400 nm
15.0 %

@Thickness 4.00 mm,
Wavelength 600 nm
 15.0 %

@Thickness 0.157 in,
Wavelength 600 nm
23.0 %

@Thickness 4.00 mm,
Wavelength 700 nm
 23.0 %

@Thickness 0.157 in,
Wavelength 700 nm
IR Transmittance 48.0 %

@Thickness 4.00 mm,
Wavelength 1000 nm
 48.0 %

@Thickness 0.157 in,
Wavelength 1000 nm
77.0 %

@Thickness 4.00 mm,
Wavelength 1600 nm
 77.0 %

@Thickness 0.157 in,
Wavelength 1600 nm
80.0 %

@Thickness 4.00 mm,
Wavelength 2500 nm
 80.0 %

@Thickness 0.157 in,
Wavelength 2500 nm
UV Transmittance 0.000 %

@Thickness 4.00 mm
 0.000 %

@Thickness 0.157 in
Electrical Properties Metric English Comments
Volume Resistivity 400000 ohm-cm

@Temperature 350 °C
 400000 ohm-cm

@Temperature 662 °F
 DIN 52326
1.00e+7 ohm-cm

@Temperature 250 °C
 1.00e+7 ohm-cm

@Temperature 482 °F
 DIN 52326
Dielectric Constant 6.50

@Frequency 1.00e+6 Hz,
Temperature 25.0 °C
 6.50

@Frequency 1.00e+6 Hz,
Temperature 77.0 °F
Dielectric Loss Index 0.00300

@Frequency 1.00e+6 Hz,
Temperature 25.0 °C
 0.00300

@Frequency 1.00e+6 Hz,
Temperature 77.0 °F
Chemical Properties Metric English Comments
Acid Class, SR 1.00
1.00
DIN 12116
Alkali Class, AR 1.00
1.00
ISO 695
Descriptive Properties Value Comments
Acoustical Characteristic, vlong. 6420 m/s
Appearance Translucent
Color White
Hydrolytic Resistance HGB 1
DIN ISO 719
tk100(°C) 199
specific electric volume resistivity of 10<sup>8</sup> O·cm
Thermal Shock Resistance (TSR) 700°C
Resists cold water without cracking
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