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Ensinger PEI

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724-8 Nextrema® Opaque White Glass Ceramic/SCHOTT
Categories: Ceramic; Glass; Glass Ceramic
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 expansion
  • Excellent temperature and thermal shock resistance
  • High transmission in infrared range and unique visible light transmission profiles with different specific grades
  • Excellent chemical resistance
High mechanical strength technical data presented herein are typical averages.
Vendors: NEXTREMA® glass-ceramics from SCHOTT combines the benefits of technical glasses with properties of high temperature materials.
General Brochure
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Physical PropertiesOriginal ValueComments
Density 2.54 g/cc
Porosity 0.00 %ISO 9385
 
Chemical PropertiesOriginal ValueComments
Acid Class, SR 1.0DIN 12116
Alkali Class, AR 1.0ISO 695
 
Mechanical PropertiesOriginal ValueComments
Knoop Microhardness 600HK 0.1 / 20; ISO 9385
Modulus of Elasticity 86.0 GPaASTM C-1259
Flexural Strength 150 MPaBending sbB; DIN EN 1288, Part 5, R45
Poissons Ratio 0.26ASTM C-1259
Shear Modulus 34.1 GPaCalculated by MatWeb
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity 400000 ohm-cm
@Temperature 350 °C		DIN 52326
 1.00e+7 ohm-cm
@Temperature 250 °C		DIN 52326
Dielectric Constant 6.6
@Frequency 1e+6 Hz,
Temperature 25.0 °C		DIN 53483
Dielectric Loss Index 0.0020
@Frequency 1e+6 Hz,
Temperature 25.0 °C		DIN 53483
 
Thermal PropertiesOriginal ValueComments
CTE, linear 0.630 µm/m-°C
@Temperature 20.0 - 300 °C
 1.34 µm/m-°C
@Temperature 300 - 700 °C
Specific Heat Capacity 0.800 J/g-°C
@Temperature 20.0 - 100 °C
Thermal Conductivity 1.70 W/m-K
@Temperature 90.0 °C		DIN 51936, ASTM E 1461-01
Maximum Service Temperature, Air 550 °C
@Time 1.80e+7 sec		Inhomogeneous Heating
 600 °C
@Time 3600 sec		Inhomogeneous Heating
 850 °C
@Time 1.80e+7 sec		Homogeneous Heating
 950 °C
@Time 3600 sec		Homogeneous Heating
 
Optical PropertiesOriginal ValueComments
Transmission, Visible 0.00 %
@Thickness 4.00 mm,
Wavelength 400 nm
 2.0 %
@Thickness 4.00 mm,
Wavelength 600 nm
 5.0 %
@Thickness 4.00 mm,
Wavelength 700 nm
IR Transmittance 17 %
@Thickness 4.00 mm,
Wavelength 1000 nm
 25 %
@Thickness 4.00 mm,
Wavelength 1600 nm
 60 %
@Thickness 4.00 mm,
Wavelength 2500 nm
UV Transmittance 0.00 %
@Thickness 4.00 mm
 
Descriptive Properties
AppearanceOpaque
ColorWhite
Hydrolytic Resistance HGB1DIN ISO 719
tk100(°C)197specific electric volume resistivity of 108 O·cm
Thermal Shock Resistance (TSR)700°CResists cold water without cracking

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