Silicon dioxide 

SiO2 Silicon Dioxide Granule

SiO2, known as silica, is a chemical compound that can be found in the nature as sand or quartz.

Specifications

ShapeColorPurityPackageStorage
CrystalGranule1-3 mm; 3-5 mmColorless
Transparent
99.9%
99.95%
99.99%
1 Kg/BagAvoid exposure to sunlight & acid
Keep dry
Pillare.g.: 2x4 mm
Cutting piecee.g.: 20x10 mm

 Characteristics of silicon dioxide

CAS NumberDensity (g/cm3)Boiling point (Cº)Melting point (Cº)Refractive index at 550 (nm)Transparency range (µm)Evaporation source
7631-86-92.2
295017001.45-1.460.2-9E
ApplicationsAR coating: Cold light coating; Filter; Insulating coating; Glass coating; UV coating

 Evaporation technique

Electron beam evaporation works well for optical SiO2 because of its refractive index and it is evaporated from a graphite or tantalum crucible liner. Films result to be smooth and amorphous with good adhesion.

Silicon monoxide 

SiO is an amorphous solid, available in many forms. It is a highly desirable coating material due to its high deposition rate and ease of evaporation using low cost resistance-heated coating systems.

Specifications

ShapeColorPurityPackageStorage
SinterBlocky1-40 mm
Upon demand
Black99.99%1 Kg/BagAvoid exposure to sunlight & acid
Keep dry
Granule1-3 mm; 3-5 mm
Cuboid piece100x100x50 mm
Tablet28x10 mm, 18x10 mm

 Characteristics of silicon monoxide

CAS NumberDensity (g/cm3)Boiling point (Cº)Melting point (Cº)Refractive index at 550 (nm)Transparency range (µm)Evaporation source
10097-28-62.13
188017001.8-1.90.4-9B (Ta, Mo, W)
ApplicationsCold light coating; Decorative coating; Protective coating

 Evaporation technique

Resistance heating in baffle boats is the most common evaporation method used, but electron beam evaporation may also be used, particularly with tablets.