A kind of non-rare earth ion activated yellow phosphor and preparation method thereof
A yellow phosphor, non-rare earth technology, applied in the field of non-rare earth ion-activated yellow phosphor and its preparation, can solve the problems of poor control stability, strict ratio of raw materials and high cost of raw materials, and achieves low cost, short preparation time, The effect of high safety performance
Active Publication Date: 2019-01-11
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology
[0004] The purpose of the present invention is to provide a non-rare-earth ion-activated yellow fluorescent powder and its preparation method, to develop a new yellow-emitting fluorescent material, to solve the common need of existing fluorescent materials to add rare-earth ion activators, raw material costs Higher, stricter ratio of raw materials, poor control stability
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Embodiment 1
[0028] Weigh the raw materials in the following molar ratios: CaCO 3 :(NH 4 ) 2 HPO 4 = 10:6, after the components are uniformly mixed in proportion, the solid solution phosphor powder is obtained by high-temperature solid-phase reaction under the condition of 1300° C. carbon particle embedding for 3 hours.
Embodiment 2
[0030] Weigh the raw materials in the following molar ratio: CaO:(NH 4 ) 2 HPO 4 =3:2, after the components are mixed uniformly in proportion, the solid solution phosphor powder is obtained by a high-temperature solid-phase reaction at 1350° C. under the condition of carbon particle embedding for 3 hours.
Embodiment 3
[0032] Weigh the raw materials in the following molar ratio: (CaO+CaCO 3 ): (NH 4 ) 2 HPO 4 = 10:6 (by Ca 2+ Calculate the molar amount of ions) After mixing the components uniformly in proportion, the solid solution was obtained by high-temperature solid-phase reaction at 1300 °C for 2.5 hours under the condition of carbon particle embedding. Among them, CaO and CaCO 3 The molar ratio is 2:3.
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The invention discloses yellow fluorescent powder activated by non-rare earth ions. The yellow fluorescent powder is a solid solution generated by a high-temperature solid-phase reaction under a reducing atmosphere, the solid solution consists of the following substances in a molar ratio: 3-10 molar ratio of substance A and 2-6 molar ratio of (NH4)2HPO4 or(NH4)H2PO4, wherein the substance A is carbonate with a cation Ca2+, one kind of oxide or the mixture of two kinds of the oxide in a discretionary proportion. When the substance A is the mixture, the cation is replaced according to an equal value, and the total number of molar parts is remained constant according to chemical metrology. Besides, the invention further provides the preparation method of the fluorescent powder. The preparation method comprises the step of reacting all the substances at the high temperature of 1100-1500 DEG C under a reducing atmosphere for 2-3 hours so as to obtain the yellow fluorescent powder. The preparation method disclosed by the invention is simple in technology and low in the cost of raw materials, industrialization is facilitated, a rare earth ion activator is not adopted, the prepared fluorescent powder can emit out bright yellow light under the excitation of ultraviolet rays, and the yellow fluorescent powder is high in light-emitting brightness and has a wide application prospect.
Description
technical field [0001] The invention relates to a fluorescent powder and a preparation method thereof, in particular to a yellow fluorescent powder activated by non-rare earth ions and a preparation method thereof. Background technique [0002] Phosphor is a substance that causes luminescence under the action of ultraviolet, visible radiation and electric field. It has a variety of colors and can be widely used in energy-saving lighting, medical imaging diagnosis (CT / PET), high-end security monitoring, industrial non-destructive testing, etc. an area. [0003] Phosphors emit light by using mercury vapor or ultraviolet rays generated by UV chips as excitation light sources, but such phosphors inevitably use precious rare earth ions as activators to deactivate the matrix to transition the characteristic energy levels of rare earths to achieve luminescence. Therefore, it generally has the following problems: 1. The rare earth resources are scarce and the cost is high, and the ...
Claims
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IPC IPC(8): C09K11/71
Inventor 赵妙
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)