30results about How to "Wavelength does not change" patented technology

The invention belongs to the field of luminescence materials, and discloses a metal particle-doped hollow structure calcium titanate praseodymium luminescence material and a preparation method thereof, wherein the structure general formula of the luminescence material is Ca1-xTi1-ySnyO3:Prx@Mz, M is doped metal nanoparticles and is at least one selected from Ag, Au, Pt, Pd and Cu, @ represents cladding, M is the inner core, and Ca1-xTi1-ySnyO3:Prx is the outer shell. According to the metal particle-doped hollow structure calcium titanate praseodymium luminescence material, the dispersed carbon spheres are adopted as the template, such that the obtained hollow structure having the spherical calcium titanate praseodymium has the controlled morphology; and due to introduction of the M metal nanoparticles, the luminescence efficiency of the calcium titanate praseodymium luminescence material can be substantially increased under the same excitation condition, and the wavelength of the emission light is not changed.

The invention belongs to the field of luminescent materials, and discloses a lanthanum oxysulfide luminescent material and a preparation method thereof; the general chemical formula of the luminescent material is La 2‑x‑n o 2 S:Tb x 3+ , Dy n 3+ @M z ; Among them, La 2‑x‑ n o 2 S:Tb x 3+ , Dy n 3+ is the shell, @ is the coating, M is the core; M is at least one of Ag, Au, Pt, Pd, Cu, 0<x≤0.2, 0<n≤0.02, z is M and La 2‑x‑n o 2 S:Tb x 3+ , Dy n 3+ Mole ratio, 0<z≤1×10 ‑2 . The lanthanum oxysulfide luminescent material provided by the present invention introduces M metal nanoparticles and enhances phosphor luminescence by doping the metal nanoparticles, so that the luminous efficiency of the lanthanum oxysulfide luminescent material is greatly improved under the same excitation conditions.

The invention discloses alkali-metal-ion-reinforced red light type fluorescent powder formed by adulterating titanate in rare earth and a preparation method. The fluorescent powder is formed by adulterating rare earth ions Eu<3+> and charge compensation ions M<+> to a base material ZnTiO<3>, and the general chemical formula is ZnTiO<3>: xEu<3+>, yM<+>, wherein x is greater than or equal to 0.5% and less than or equal to 2.5%, y is greater than or equal to 1.5% and less than or equal to 8.5%, and M<+> represents alkali metal ions. According to the fluorescent powder, the adverse effect caused by introduction of alkali metal is eliminated by adjusting the heat treatment process, the luminous efficiency of a rare-earth-titanate luminescent material can be greatly improved under the same excitation condition, the wavelength of emitted light is not changed, the rare-earth-titanate luminescent material is good in luminescence property, color purity and luminance of the emitted light after being exited are both improved, and the fluorescent powder can be applied to a white-light-used LED. According to the preparation method of the fluorescent powder, a sol-gel preparation technology is adopted, the method is simple, the cost is low, the heat treatment process is simple and easy to control, and actual production of the material is facilitated.

The invention discloses a gallate luminous material and a prepration method thereof, the chemical formula of the gallate luminous material is La1-xGaO3: Lnx, My, wherein Ln is one or two of Tm 3+, Tb 3+, Eu 3+ and Sm 3+, M is one of Ag, Au, Pt and Pd, y is the molar ratio of La1-xGaO3: Lnx, the value range of x is 0.001-0.1, and the value range of y is 0.00002-0.01. The sol-gel method is adopted for preparing the gallate luminous material, the process is simple, the process conditions are easy to achieve, the quality of a prepared product is high, and the obtained gallate luminous material can greatly improve the luminous efficiency and have excellent luminous performance.

The invention belongs to the field of luminescent materials, and discloses a hollow-structure strontium terbium aluminate luminescent material and a preparation method thereof. The chemical general formula of the luminescent material is Sr1-xAl2O4:Tbx@My, wherein @ represents cladding, Sr1-xAl2O4:Tbx is an outer shell, and M is an inner core, M is at least one selected from Ag, Au, Pt, Pd and Cu metal nanoparticles, 0<x<=0. 1, and 0<y<=1*10<-2>. According to the provided hollow-structure strontium terbium aluminate luminescent material, because of introduction of the M metal nanoparticle, the luminescent efficiency of the Sr1-xAl2O4:Tbx luminescent material at a same excitation condition is greatly improved without changing the wavelength of an emission ray.

The invention relates to a titanate luminescent material and a preparation method thereof. The titanate luminescent material has the following general chemical formula: Ca1-xTi1-yO3:Prx,Ry@TiO2@Mz, wherein @ is coating, Mz is the core, TiO2 is the middle shell, Ca1‑xTi1‑yO3:Prx, Ry is the outer shell, Prx and Ry are doped in Ca1‑xTi1‑yO3; R is at least one of Al and Ga, M is Ag, Au , at least one of Pt, Pd and Cu metal nanoparticles; 0

The process of preparing fluorescent RE powder includes the following steps: 1. preparing mixture solution of yttrium nitrate 25-40 (in molar portions, the same below), aluminum nitrate 25-60, gallium nitrate 0-40, and lanthanon RE nitrate 0.03-10.0; regulating the solution pH to 2-8, adding gel forming agent and stirring at 80-120 deg.c for 1-24 hr to form gel; 2. heating the gel at 300-900 deg.c for 1.5-30 hr to obtain solid pre-baked product; and 3. grinding the solid pre-baked product, adding inorganic salt, igniting at 800-1600 deg.c in reducing atmosphere and washing to obtain the fluorescent RE powder. The preparation process of the present invention is simple, and has relaxed requirement in apparatus, high product performance and important industrial application value.

The invention belongs to the field of luminescent materials and discloses a lanthanum calcium gallate luminescent material and a preparation method thereof. The lanthanum calcium gallate luminescent material has a general molecular formula of CaLa1-xGa3O7: Dy<x><3+>@My; and in the general molecular formula, M represents at least one of Ag, Au, Pt, Pd and Cu nanoparticles, @ represents coating, the M metal nanoparticle is used as a core, CaLa1-xGa3O7: Dy<x><3+> is used as a shell, x is >0 and <=0.2, and y is > 0 and <= 1*10<-2>. Through use of the M metal nanoparticles, the luminescence efficiency of the lanthanum calcium gallate luminescent material is greatly improved under the same excitation condition and emitted light wavelength is not changed. The lanthanum calcium gallate luminescent material has good luminescence performances and color purity and brightness of the excited emitted light are high.

The invention belongs to the field of luminescent materials, and discloses a strontium aluminate luminescent material and a preparation method thereof. The general chemical formula of the luminescent material is Sr 4-x (Al 1-y In y ) 12 o 25 :Eu x , M z , wherein, M is at least one of Ag, Au, Pt, Pd, Cu metal nanoparticles, the value range of x is 0<x≤0.2, the value range of y is 0<y≤0.2, and the value range of z is 0<z≤1×10 -2 . The strontium aluminate luminescent material of the present invention, due to the introduction of In and M metal particles, enhances the luminescence of phosphor powder by doping In and doping metal nanoparticles, so that the luminous efficiency of the strontium aluminate luminescent material under the same excitation conditions is greatly improved. Big improvement.