Fluorescent pigments manufacturer, Lamp phosphors

Lamp phosphors are mainly three categories. The first class for ordinary fluorescent lamps and low-pressure mercury lamp, high pressure mercury lamp and a second category for self-ballasted fluorescent lamps, the third category for UV sources. There are also many types of phosphors, and the price is not the same, phosphor has good thermal stability, safety and environmental protection, suitable for all kinds of white, you can not adjust the lights of red, blue, yellow color equivalent,Fluorescent and low pressure mercury lamp phosphors
Antimony, manganese activated calcium halide phosphors and rare earth trichromatic phosphors.fluorescent pigments manufacturer
Antimony, manganese activated calcium halophosphate phosphor is 2 · Ca (F, Cl) 2 incorporating a small amount of activator antimony (Sb) and manganese (Mn) in CFC apatite matrix 3Ca3 (PO4) made after phosphor, is usually expressed as the formula:3Ca3 (PO4) 2 · Ca (F, Cl) 2: Sb, Mn
The preparation of this phosphor material may be used in many different, but the raw material of high purity requirements. Formulating the mixing amount of each raw material is first performed in a calcium halophosphate theoretical calculation, the calcium and the number of gram atoms of manganese phosphate and phosphorus from 4.9 gram atom ratio of the apatite structure: 3; followed by weighed, mixed, ground, sieved and then in a certain atmosphere (typically nitrogen), heated to about 1150 ° C sintering hours; removed after cooling, the UV lamp selection, and then ground and sieved namely finished.
When the activator Sb will absorb some of the energy of excitation energy in the form of optical radiation emitted by these phenomena simply changing the Mn content, you can get a different color temperature halogen phosphate phosphor.
Phosphor radiation absorbing ability and the degree of dispersion of the phosphor, and therefore greatly affect the particle size of the light-emitting luminance. Calcium halophosphate phosphor particle size is determined by the raw material particle size of CaHPO4 and therefore obtain a certain size, and crystal lattice CaHPO4, phosphor particle size can be controlled in a certain size (5 ~ 10 & micro;), thereby obtaining high emission luminance .garden decorative stones
Rare earth trichromatic phosphors in Pink for europium-activated yttrium oxide (Y2O3: Eu), green powder as cerium, terbium-activated aluminate (MgAl11O19: Ce, Tb), pink and blue for low-europium-activated barium aluminate magnesium (BaMg2Al16O27: Eu). Three kinds of powder can be obtained by mixing different color temperatures (2700 ~ 6500K), the corresponding lamp luminous efficiency of up to 80 ~ 100lm / W, color rendering index of 85 to 90. In general, green powder content, the lower blue powder content, the higher the efficiency of the lamp light. In addition, increased powder blue, the color temperature rises; Pink increases, the color temperature is lowered.
Matrix and the three-color dye-activating substance is different, but the key is that both of the light emitting rare activating substance (Eu, Ce, Tb, etc.), the use of rare earth metal ion outer layer (D → F) transition and emit light.
Rare earth trichromatic phosphor Fluorescent itself has many outstanding advantages, however, are expensive rare earth materials, resulting in higher costs tricolor light, limiting the development of the three primary colors of light. Narrow diameter or new coating technology to reduce the amount of three-Toner, with cheap colored powder to partially replace other one or two rare three-Toner, the same can be obtained by high-efficiency, high color rendering fluorescent lamps, but the light may be a little bad.