US 8,956,553 B2 · Fluorescent powder of halogen silicate containing nano-metal particles and preparation method thereof

Abstract

Provided is a fluorescent powder of halogen-silicate containing nano-metal particles with the formula of CaX2.y(Ca1-a-bEuaMnbO).SiO2:zM, wherein X is fluorin or/and chlorine, y is 1 or 2, z is molar ratio of nano-metal particles and fluorescent powder CaX2.y(Ca1-a-bEuaMnbO).SiO2, 0<z≦1×10−2, 0<a≦0.3, 0≦b≦0.3. The method for preparing the fluorescent powder is also provided. For the surface plasma resonance effect occurring on the surface of the nano-metal particles, the fluorescent powder has stronger luminous intensity. The preparation method is simple to operate, no pollution, easy to control, easy to produce in industry, and can be widely used in the preparation field of fluorescent powder.

Claims9

Dependent claims

A fluorescent powder of halogen-silicate containing nano-metal particles, wherein said fluorescent powder of halogen-silicate containing nano-metal particles is a mixture of CaX2.y(Ca1-a-bEuaMnbO).SiO2 and zM, wherein X is fluorine and/or chlorine, y is 1 or 2, z is molar ratio of nano-metal particles and fluorescent powder CaX2.y(Ca1-a-bEuaMnbO).SiO2, z is in a range of 0<z≦1×10−2, a is in a range of 0<a≦0.3, b is in a range of 0≦b≦0.3, said nano-metal particles M is one of nano-metal particles Ag, Au, Pt or Pd.

A method for preparing fluorescent powder of halogen-silicate containing nano-metal particles, comprising:

step 1, preparing nano-metal particles colloid;
step 2, adding surface treating agent into nano-metal particles colloid to carry out surface treatment of nano-metal particles;
step 3, adding absolute alcohol, deionized water and ammonia water to nano-metal particles colloid obtained in step 2, stirring, then adding tetraethyl orthosilicate with stirring and reacting, then drying, pre-burning, grinding to obtain the desired M@SiO2 powder;
step 4, selecting source compound of calcium, source compound of europium, source compound of manganese and a halogen containing calcium compound according to stoichiometric ratios, mixing, said stoichiometric ratios of the source compounds are according to the molar ratio of corresponding elements in CaX2.y(Ca1-a-bEuaMnbO), where X is fluorine and/or chlorine, y is 1 or 2, a is in a range of 0<a≦0.3, b is in a range of 0≦b≦0.3, with a 10% to 40% by weight excess of calcium halide;
step 5, adding M@SiO2 powder obtained in step 3 into the mixture obtained in step 4, grinding, then pre-burning, cooling, grinding, then sintering in reducing atmosphere, grinding, washing, drying and sieving to obtain said fluorescent powder of halogen-silicate containing nano-metal particles.

2 more elements

Dependencies are inferred from the claim text.

Fluorescent powder of halogen silicate containing nano-metal particles and preparation method thereof

Life of this patent

Fluorescent powder of halogen silicate containing nano-metal particles and preparation method thereof

Life of this patent

Abstract

Claims9