Containing material is generally present excitation tritium

Containing material is generally present excitation tritium (3H or T), promethium (Pm) and radioactive radium sulfate (Ra) , fluorescent agents and fluorescent agents , mostly zinc sulfide, glow in the dark , calcium or zinc , and other alkylene sulfates. Tritium (3H or T) and promethium (Pm) , though still radioactive , but the potential damage to the human body is much smaller. Tritium (3H or T) is an isotope of hydrogen , the nucleus consists of a proton and two neutrons , with radioactivity occurs β decay half-life of 12.43 years . Although tritium (3H or T) material also manufacture thermonuclear gravel driveway , but its β decay will release the fast-moving electrons, does not penetrate the human body, only a lot of contact with and inhalation of tritium (3H or T) will cause the human body injury.

Luminous energy storage characteristics of decorative aggregate

1, has stable physical and chemical properties.
2, the service life of up to 10 years.
3 , does not contain any radioactive material , non-toxic , harmless, no burning, no phosphorus, lead and other decorative aggregate elements or chemicals , human security , by detecting the national authoritative departments.
4 , no power, measured by the Chinese Academy of testing, the product non-toxic, non-radioactive , chemical stability .
5 , low excitation conditions , sunlight , general lighting , ambient stray light can be used as the excitation source .
6 , small particles easily with various transparent media material mixture.
7, the light at the absorption , dark light. Absorb visible light at daylight , lighting , environmental stray light , darkness automatically continue to light , to give people more information indicates darkness .
8 , can be infinitely repeated use , the safety factor of 100%.
9 , has a good aging resistance, corrosion resistance, heat resistance , flame resistance , and has a scratch resistance .
10 , high brightness , long light-emitting time , masterbatch glow in dark the requirements of the fire evacuation .
11 , simple installation , easy maintenance . According to the actual needs of public spaces , flexible installation , floors, staircase surface , can be carried out in different parts of the roof of the sign installation.

Luminous paint matrix

Luminous paint matrix , activator and coactivator ( also known sensitizer ) rational choice is its excellent performance afterglow important guarantee . Necessary to provide a suitable matrix crystal environment required the activator ions are those having a relatively low energy of 4f → 5d transition of rare earth ions , and photoluminescent paint are not equivalent auxiliary activation substituted divalent alkaline earth metal ions in the formation of different depths trap for storing electrons or holes [ 3 ] . When a light beam is incident to the solid material, the luminescence centers exist between different types of sub-layer interlacing the electronic level will be in the base of the ionic state and excited state transitions between the movement , the photoluminescent stones beam will be transferred at this time to the excited electrons , that is, the wavelength of the light is absorbed. However, in the excited state is a metastable electronic , once light stop , the electrons release the energy of the light wavelength that transitions to the ground state , thereby causing the light-emitting substance , which is a light energy storage process .

Select the easily degradable

Select the easily degradable , with good light resistance, solvent resistance, resistant to acid , and a variety of salts have a very high tolerance , the porous , hydrophilic surface has a strong adhesion , can form strong ,photochromic sheets good tear and abrasion resistance film substrate . If the coating amount of the matrix is too high, the viscosity of paint is too large , easy construction , and the transparency is poor , poor light transmission ; Phosphorescent Ceramic is too small, prone to sagging brushing , poor leveling . Thus , the light emitting amount of the coating to the substrate of about 30% is suitable.

luminous powder caking precipitation

Luminous paint should, apart from having a light emitting characteristics , but also has excellent mechanical properties and appropriate cost , you can choose to add calcium carbonate, talc filler. Calcium carbonate can improve the cheap gravel of the coating film , reduce costs. Since the refractive index of calcium carbonate was 1.58 , and the refractive index of the resin base material similar to the light so that it does not have a hiding power , used in conjunction with the talc can increase the thickness and uniformity of the coating , photochromic pigments mechanical strength of the coating . Talc is a white powder , light soft, creamy , excellent chemical stability , low opacity , color strength is small, oil-absorbing capacity, to prevent precipitation of luminous powder agglomeration, coating prevents sagging and cracking, improve coating flexibility, water resistance and abrasion resistance .

Currently prevailing light emitting material is easy to precipitate coating

Currently prevailing light emitting material is easy to precipitate coating , the surface is not smooth , uniform light , mechanical properties are not high , impact resistance , abrasion resistance, water resistance and poor phenomenon, so the coating system must be added to the appropriate dispersant, anti-settling agents, glowproducts agents, defoamers, plasticizer, nano-materials, luminescent agents help to prepare a high performance energy storage luminous paint .
 SrA12O4: Eu2 +, Dy3 + phosphor poor water resistance , glow pigment powders immersion in water or exposed to humid air , water their deliquescence , generating strontium aluminate hydrate (SrAl2O4 · nH2O) and strontium hydrate [ Sr (OH) 2 · nH2O], the crystal changes, decreased SrAl2O4: Eu2 +, Dy3 + emission intensity until we lose luminescent properties .

luminous glow produced low levels of sand

When SrAl2O4 365nm UV excitation light when , Eu2 + 4f → 5d transitions produce . Auxiliary active ions Dy3 + and adding , changing the shape of the lattice , the lattice distortion , resulting in the impurity level ( trap level ) , photoluminescent paint level is mainly produced by the D to join , and replaced by Sr2 + Dy3 + cause the generation of holes , the trap level is relatively uniform holes produced by the donor level . The energy level in the excited state of Eu2 + ground state level and between levels . When an electron is excited from the ground state to the excited state , the part of the electronic transition back to the low level photoluminescent sheet, another part of the electrons through the relaxation process is stored in the trap energy level , when the electron trap levels absorbed energy, the re- stimulated Back excited states , transitions back to the ground state energy and light.