Monthly Archives - October 2018

Preparation of long-lasting phosphorescent materials through combustion method

The experiment of preparing long-lasting phosphorescent materials through the combustion method Experimental Objectives: 1. Learn to rapidly synthesize long-lasting luminescence materials using the combustion method. 2. Understand long-lasting luminescence materials and their long-lasting luminescence principles. 3. Learn the basic methods for rapidly synthesizing inorganic oxides and nanomaterials using the combustion method. The synthesis method of long-lasting glow materials and the relevant experimental steps for synthesizing them using the combustion method Experimental principle: The combustion method is also known as self-propagating high-temperature synthesis method....

Some common long afterglow materials and afterglow time

Long afterglow material Main peak Time color SrAl2O4:Eu,Dy 520nm >60h green CaAl2O4:Eu,Nd 450nm >20h blue Sr4Al14O25:Eu,Dy 486nm >30h blue Sr2MgSi2O7:Eu,Dy 466nm >20h blue Ca2MgSi2O7:Eu,Dy 545nm >20h green MgSiO3:Mn, Eu,Dy 644nm ~4h red Cd2Ge7O16:Mn 585nm >3h orange MgSnO4:Mn 499nm >5h green Zn3Ga2Ge2O10:Cr 700nm >360h red

Contrast of zinc sulfide and strontium aluminate phosphor luminescent powder

What is traditional Zinc Sulphide pigment? Some of the first phosphors to be developed were inorganic zinc sulphide compounds. (German submarine commanders during World War I reportedly rubbed these compounds on their hands to read documents during blackout conditions.) These phosphors typically absorb energy from deep blue and ultraviolet light and emit it as yellow-green light.This is useful in that the peak spectral distribution of the emitted light roughly coincides with the peak spectral sensitivity of the human visual system...

Photoluminescent Pigment Production Technic Process

Long-lasting glow powder is a special type of crystal structure luminescent material. It has strong absorption, storage and luminescence capabilities. When exposed to natural light and artificial light, the light energy is absorbed and stored, and then slowly released in the form of visible light in the dark. The luminescence can be activated in the dark for 5 minutes and then automatically continues to emit light for up to 12 hours. The absorption process can be repeated countless times...