JPS6014057B2 - fluorescent material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel crab phosphor that emits red light when irradiated with electron beams, ultraviolet rays, etc.

Recently, energy saving has become an important issue in various fields.

Looking at this with respect to the crab light lamp for illumination, it follows that in order to save energy, the overall light body must be highly efficient. When considering flea photoluminescence from this perspective, it is necessary to pay special attention to the following two points.

That is, the human eye's sensitivity to brightness differs depending on the color of the emitted light, with green being the brightest and red and blue being the darkest. Therefore, the first thing to do is to be satisfied with the sense of brightness as seen by human senses, that is, with respect to visibility. Second, the color of the illuminated object can be reproduced in a natural state, that is, it has good color rendering properties. However, it is generally difficult to achieve both high color rendering and high efficiency, and in order to achieve high color rendering, a large amount of red component with poor visibility is generally required.

For this reason, there has been a strong demand for a red nectar that exhibits high efficiency and high color rendering properties when used in combination with known green phosphors and blue phosphors. Therefore, based on this objective, the inventor conducted studies on various types of nectar, and finally succeeded in providing a new red-emitting crab phosphor.

That is, the crab photoreceptor according to the present invention has the composition formula Y203.
・Ce02: E is expressed as 10, and it is characterized in that trivalent europium E is interlayered with a part of yttrium Y as an activator.

This crab photoreceptor is exposed to the first
As shown in the figure, there are main emission peaks near the 61st axis and 62nd axis, and there are also emission peaks near the spotless pongee and the 59th axis.

Therefore, it has good color rendering properties and is also advantageous in terms of visibility. In addition, trivalent europium E as an activator has a value of 1 to 1 to yttrium Y, calculated as trivalent.
It is preferred in practice that only 15 atom % is substituted for that part.

For example, this crab photoreceptor can be produced by thoroughly dry mixing Y2Q, Snake 02 and Eri 03 as raw materials, or from an aqueous solution of yttrium, germanium, and europium chlorides dissolved in water as oxalate. In a firing furnace under an oxidizing atmosphere, preferably an air atmosphere,
It is synthesized by firing at a temperature of 0q○ for about 1 to 10 hours.

This crab phosphor can be used alone as a red-emitting crab phosphor, or can also be used in combination with other phosphors. Next, examples will be described together with subsidiary examples.

A crab light lamp was manufactured using the red crab light body according to the present invention, and its light emitting characteristics were compared with that of a conventional full-body light lamp.

The photoreceptor used in this example is as follows. Training portion Sr.

(P04) 6CI23Eu20 component (Ce, Th
) MgA1,. A mixture of 0.9 red component Y2Q/Q02:E of 10 or more crab photons was dispersed in butyl acetate thickened with nitrocellulose, and applied to a light-receiving lamp bulb.

In this case, a binder such as calcium pyrophosphate may be added to increase the binding effect. The mixing ratio of each crab light body was expressed as the emission spectrum intensity ratio of each of these light bodies, and was set as shown in Table 1. Here, the emission spectrum intensity ratio is defined as ``When the same amount of UV as that applied to the mixed composition is applied to each crab light substance alone, the light spectrum intensity of each crab is set to 1. It represents the ratio of each connected light spectrum intensity in the mixed composition of 40W, 32 side, Ar enclosed, 2.
A 5 ton crab light lamp was manufactured and its light emitting characteristics were investigated.

The results are shown in Table 2. The crab light lamp is 4200K, white (chromaticity point x=0.37, y=0.
38) was examined. Table 2

[Brief explanation of the drawing]

Fig. 1 is a characteristic diagram showing the spectral energy distribution of the crab light body according to the present invention. Figure 1

Claims (1)

[Claims] 1 It is represented by the compositional formula Y_2O_3・GeO_2:Eu^3^+, and is characterized in that trivalent europium Eu^3^+ is substituted for a part of yttrium Y as an activator. A fluorescent material. 2. The phosphor according to claim 1, wherein the amount of substitution of trivalent europium Eu^3^+ is 1 to 15 at % relative to yttrium Y.