Japan Ceratec developed a high performance ceramic fluorescent lamps for LED lamps

Japan's Pacific cement company's subsidiaries, is engaged in the high performance ceramic products business in Japan Ceratec company (headquarters in Sendai), developed only by the high performance ceramic composition of the parent phase LED lamp fluorescent plate "PhosCera" (pending trademark registration), has recently begun to supply samples. Ceratec is expected to be able to achieve low cost through mass production. The company said, this is the first time in Japan by high-performance ceramic composition of the LED fluorescent plate".

The development of fluorescent plate is mainly used for remote phosphor powder LED lamps. Remote phosphor is a way to separate the fluorescent plate from the substrate that encapsulates a plurality of blue LED elements (as a source of heat and light). Fluorescent plate coating of green Huang Hong colored phosphor (average size of 10 ~ ~ 20 m) in the blue LED light source, will be excited to emit a variety of light. When the light is mixed, it will form a white. The development of fluorescent panels are mainly used in large commercial facilities and factories and other large space LED lighting appliances.

On the surface Huang Hong green phosphors particles, first coated with a layer of fine special ceramic particles (diameter of nm) as the bonding layer, and then forming a ceramic particle coating parent phase such particles (average particle size of 10 ~ 20 m) mixed and dispersed in a solvent made of "ink", then the "ink" painted as heat-resistant glass surface fluorescence substrates by screen printing method (inside), and then drying, baking, forming a coating of phosphor plates. It is estimated that the coating can be bonded to the surface of the glass by the adhesion of ceramic particles. Products, ceramic parent phase evenly dispersed green colored coating Huang Hong fluorescent powder thickness is about 80 M.

Ceratec said that the ceramic particles are adhesive coating, its main component is SiO2 ceramic, "fluorescent powder by YAG (garnet crystal structure composed of Y3Al5O12 composite oxide of yttrium and aluminum) phosphor and sulfide phosphor composition". In general, the moisture in the air is likely to lead to deterioration of fluorescent powder, but the fluorescent powder mixed in the ceramic particles in the parent phase, you can block water, improve durability.

MAKITA, the other company supplied by the remote fluorescent powder LED lamps is estimated to be used as an organic binder resin glue to fix the various phosphors. According to Ceratec, compared with the use of organic adhesive products, ceramic particles formed by the parent phase, lamp heat resistance, light resistance and luminous efficiency will all improve, especially luminous efficiency will be greatly improved.

On the heat resistance, in the long-term use of the prototype test (the temperature of 150 DEG and 200 DEG C, dry environment), after 2000 hours of exposure, "the relative brightness does not change". "In the case of the use of the original organic binder, the relative brightness of the light will slowly drop a few percentage points, especially at 200 degrees Celsius temperature, there have been testing in the coating from the substrate glass peeling situation. The samples' heat resistance above 500 degrees celsius".

In the long term humidity test (85, relative humidity is 85%RH), the results of the relative brightness of the light have been obtained". It can be confirmed that the phosphor is fully protected.

When LED is used as a lighting device, the color rendering index (which represents the wavelength spectrum of the light) is very close to natural light, which is very good. By changing the mixing ratio of various colors of green Huang Hong fluorescent powder, you can adjust the brightness of the lighting to the best state.

Ceratec said that the development of the fluorescent film has excellent light resistance, so it can be used for UV LED and laser and other requirements with excellent light resistance.