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NEXTREMA® Transparent (724-3) Sheet

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Description

NEXTREMA® is a unique glass-ceramic material platform. This material combines the glossy appearance of glass with exceptional thermal, chemical, optical and mechanical properties like an attractive bending strength of 100 - 165 MPa for materials with a thickness of around 4 mm. With a thermal resistance of up to 950 °C, depending on the material type, combined with a thermal shock resistance of 600 - 820 °C, it ensures a reliable material performance even under extreme temperature conditions. Our six unique glass-ceramic types combined with the wide range of sizes and thicknesses varying from 2 mm to 6 mm (> 6 mm on request) will open up new possibilities in product design and performance. The unique transmission spectra provide new ideas for combining innovative infrared heating functionalities with attractive lighting effects. The versatility of this material will surely impress you.

Ashby charts

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Properties

General

Density

ρ

2.5 - 2.6 g/cm³ at 20 °C

approx.

Porosity

Vvoid

0 %

approx., ISO 9385

Surface roughness

RMS

0.25 μm

approx., t = 4 mm

Dimension

Dimensions

Flat cut-to-size panels and bent panels are also available. Formats of flat cut-to-size panels and bent panels on request.

Length

l

1600 - 1954 mm

Thickness

t

3 - 6 mm

Width

w

900 - 1100 mm

Mechanical

Elastic modulus

E

84 - 95 GPa at 20 °C

approx., ASTM C-1259

Flexural strength

σbend

100 - 165 MPa at 20 °C

approx., DIN EN 1288, Part 5, R45

Hardness, Knoop, HK2

HK2

570 - 600 [-] at 20 °C

approx., ISO 9385 (HK 0.1/20)

Poisson's ratio

ν

0.25 - 0.26 [-] at 20 °C

approx., ASTM C-1259

Thermal

Coefficient of thermal expansion

α

-8E-7 - 6E-7 1/K at 50 °C

for 0-50°C, DIN ISO 51045-1, DIN ISO 7991

Max service temperature

Tmax

925 °C

short heating (1h) hom.

Specific heat capacity

cp

800 - 850 J/(kg·K) at 20 °C

for 20-100°C

Thermal conductivity

λ

1.5 - 1.7 W/(m·K) at 90 °C

DIN 51936, ASTM E 1461-01

Electrical

Dielectric constant, 1MHz

εr,1MHz

6.5 - 7.8 [-] at 25 °C

DIN 53483

Electrical resistivity

ρel

3.98E+6 - 1.58E+7 Ω·m at 250 °C

DIN 52326

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Loss tangent

tanδ

2E-3 - 0.02 [-] at 25 °C

1MHz, DIN 53483

Acoustical

Sound speed, longitudinal

clong

6300 - 6700 m/s at 20 °C

ASTM C-1259

Chemical properties

Element

Weight %

Comment

Si

50 - 80 %

SiO₂ (DIN EN 1748-2-1)

Al

15 - 27 %

Al₂O₃ (DIN EN 1748-2-1)

Ba

0 - 8 %

BaO (DIN EN 1748-2-1)

Ca

0 - 8 %

CaO (DIN EN 1748-2-1)

Li

0 - 5 %

Li₂O (DIN EN 1748-2-1)

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Technological properties

Application areas

The following applications are simply examples of areas where NEXTREMA® has already been put to use successfully: BBQ applications - NEXTREMA® provides perfect visibility into the grill and can be used to optimize diverse aspects of the barbecue experience; IR applications - NEXTREMA® transforms infrared heaters into eye-catching design features and protects heating elements stylishly; High temperature furnaces - Use NEXTREMA® to line ovens or apply support plates (e.g. in display manufacturing); Household appliances - NEXTREMA® revolutionizes designs for transparent heating elements and heat resistant thin film coatings; Functional design material - NEXTREMA® is a revolutionary material for innovative product and industry design.

Compliance

NEXTREMA® materials do not contain any harmful substances according to the European directive 2002/95/EC “Hazardous Substances in electrical and electronically Equipment” and fulfill the terms of RoHS without any concerns.

Corrosion properties

The chemical resistance of NEXTREMA® is more extensive than that of most other comparable materials: Acid resistance (DIN 12116) S 1-2; Alkaline resistance (ISO 695) A 1-2; Hydrolytic class (DIN ISO 719) HGB 1.

Processing methods

NEXTREMA® is practically process inert. Even under extreme conditions, the material will not have negative interactions with the process environment. There are no interfering process factors such as gas emissions from organic components.

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This material data has been provided by SCHOTT AG.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.