Li-containing alpha-sialon fluorescent substance and method for manufacturing same, illumination device, and image display device
A manufacturing method and technology for lighting appliances, which are applied in the field of sialon-based phosphors, can solve problems such as low melting points, and achieve high fluorescence intensity effects
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Embodiment 1～8
[0142] Amorphous silicon nitride powder obtained by reacting lithium carbonate powder, lithium nitride powder, europium oxide powder, aluminum nitride powder, silicon tetrachloride, and ammonia, or a specific surface area of about 9.2 m 2 The crystalline silicon nitride of / g was weighed so that it might become the composition of Table 1. Table 1 shows the raw material composition in mol %, and Table 2 shows the raw material composition in wt %. The nylon balls for stirring and the weighed powder were put into a container, and mixed with a vibration mill under nitrogen atmosphere for 1 hour. After mixing, the powder was taken out and filled in a crucible made of boron nitride. The packing density at this time is about 0.5 g / cm when crystalline silicon nitride is used 3 , about 0.18g / cm when amorphous silicon nitride is used 3 . It was placed on a resistance heating furnace and heated from room temperature to 1000°C for 1 hour at a heating rate of 200°C / h, 2 hours from 10...
Embodiment 9
[0157] The phosphor of Example 2 and the epoxy resin were mixed at a weight ratio of 20:100 to prepare a phosphor paste. This was applied to a blue light-emitting diode (wavelength: 470 nm) mounted on an electrode, heated at 120° C. for 1 hour, and further heated at 150° C. for 12 hours to cure the epoxy resin. The obtained light-emitting diode was lit, and it was confirmed that it was daylight-colored white.
Embodiment 10
[0159] The phosphor of Example 2 and the separately prepared red phosphor CaAlSiN 3 Mixing is performed to adjust the color tone of the phosphor. The results are shown in Table 5. According to the change in hue shown in Table 5, in combination with blue LEDs, white LEDs ranging from daylight color to light bulb color can be produced.
[0160] Table 1
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[0162] Table 2
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[0166] table 5
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