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    B270 on the sun ultra-white glass with a range of high stability and high visible light transmittance characteristics. In addition, a highly stable thermal and chemical properties and fire polished surface, widely used in digital projectors, touch screen, vacuum coating the substrate and so on.

 

B 270 Ultra White Glass

Table 1.
Nature of optical Through rate
nd 1.5230
ne 1.5251
ve 58.3
2mm 91.7%
4mm 91.6%
15mm 91.0% 

Table 2.
Mechanical performance Standard value
Density 2.55g/cm3
Knoop hardness HK 100 542kg/mm2
Young's modulus E 71.5kN/mm2
Poisson's ratio ¦Ì 0.208

Table 3.
Thermal properties Standard value
Strain point 511°C 
Annealing Point 541°C 
Softening point 724°C 
Coefficient of thermal expansion 9.4×10E-6/K

Table 4.
Chemical performance Standard value
Deliquescence£¨ISO719£© HGB3
Acid resistance£¨ISO1776£© 2
Alkaline resistance£¨ISO695£© A2

 

 

 

 

 

 

 
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