SCHOTT NEXTREMA® chemical characteristics

Chemical properties

Highly resistant surface against chemical attacks
 
Only special glasses used in lab­o­ra­to­ries can compete with the re­sis­tance to acids and bases of
NEX­TREMA® glass-ce­ram­ics. The highly corrosion resistant surface ensures a reliable material performance and stable process environments even under corrosive conditions.
 

Key properties
     Benefits
   
Chemically resistant surface comparable to laboratory glassware
  • No material degradation and thus stable performance in corrosive environments
  • Reliable protection against gases, acids and bases in aggressive process environments
Non-porous, smooth surface
  • No outgassing in vacuum environments
  • No generation or adhesion of particles

Principal constituents (reference: DIN EN 1748-2-1)
The principal constituents of all the ceramic materials are as follows:

Component
 
Symbol  
Percentage per mass  
Silicon dioxide SiO2 50 % – 80 %
Aluminium oxide Al2O3 15 % – 27 %
Lithium oxide Li2O 0 % – 5 %
Zinc oxide ZnO 0 % – 5 %
Titanium oxide TiO2 0 % – 5 %
Zirconium oxide ZrO2 0 % – 5 %
Magnesium oxide MgO 0 % – 8 %
Calcium oxide CaO 0 % – 8 %
Barium oxide BaO 0 % – 8 %
Sodium oxide Na2O 0 % – 2 %
Potassium oxide K2O 0 % – 2 %
Other (trace content on request)   0 % – 5 %
The 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.  

 		  
Federal Republic of Germany waste disposal regulations differentiate five classes
of waste, Z0 (non-restricted disposal), Z3 (household waste), and up to Z5 (highly toxic waste). All NEXTREMA® materials are classified as non-restricted disposal. 
Local government regulations may differ. Please contact the local authority if
needed. NEXTREMA® must not be disposed of in recycling boxes for standard glass (e.g. glass bottles).

 		 End of life usage
The chemical resistance of NEXTREMA® is more extensive than that of most other
comparable materials.

 		  Chemical resistance

  Tinted
(712-3)		 Translucent bluegrey
(712-6)		 Opaque grey
(712-8)		 Transparent
(724-3)		 Translucent white
(724-5)		 Opaque white
(724-8)
Hydrolytic Resistance
HGB (ISO 719)		 1 1 1 1 1 1
Acid Resistance
S (DIN 12116)		 2 2 2 2 1 1
Alkali Resistance
A (ISO 695)		 1 2 2 1 1 1
1 = High resistance / low solubility
2 = medium resistance / medium solubility
3 = low resistance / high solubility
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