History Afterglow Materials Development
Short afterglow photoluminescent materials, Photoluminescent Tumbled Gravel also known as the phosphorescent light-emitting materials, luminescent materials, which is essentially a photoluminescent material, he is a kind of absorbed energy as visible light, ultraviolet, X-ray, etc., and substances can continue to emit light after excitation stops, he can be able to trap the energy stored in the material, is a kind of promising. [1]
Long-lasting material is one of the first materials research and applications, many natural ore province would have long afterglow characteristics, and for the production of a variety of items, such as "Moonwalker", "Night Pearl" (Figure 1). There are written records may be true in our country during the Song Taizong (AD 976-997 years) described (Figure 2) with the "afterglow pigment" drawn "cow painting", photoluminescent pigments the painting can see cattle into the night that the reason is this cow painting is made ??of photoluminescent pigment painted with oysters, Western earliest record of such luminescent materials in 1603 when an Italian cobbler ore roasting local alchemist, got some in the dark the red light material, after analysis showed that, within the ore contains barium sulfate, after reduction roasting became part barium sulfide afterglow materials. Since then, the 1764 British oysters and sulfur mixed with firing a blue and white light-emitting materials, namely Photoluminescent Rigid Sheet calcium sulfide afterglow luminescent material.
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