Fluorescent ceramic as well as preparation method and application thereof

Abstract

The invention discloses fluorescent ceramic as well as a preparation method and application thereof. The fluorescent ceramic is selected from at least one of substances with a composition general formula shown in a formula I, and the formula I is Lu<3-x-y>Ce<x>M<y>Al<5-y>Q<y>O12, wherein M represents a first co-doped element, the first co-doped element is selected from at least one of alkaline earth metal elements, Q represents a second co-doped element, the second co-doped element is selected from at least one of a Si element and a Ge element, x is more than or equal to 0.0001 and less than or equal to 0.3, and y is more than or equal to 0 and less than or equal to 2. Charge balance is realized through equivalent common doping of doped M<2+> and Q<4+> ions, so that variable-valence Ce<3+>ions in the fluorescent ceramic are inhibited from being converted into Ce<4+> ions, and the fluorescent ceramic is mostly composed of Ce<3+> light-emitting ions. The fluorescent ceramic has the characteristics of high density, good laser saturation performance, high luminous efficiency and the like, can be used as a key material of a color converter, and has a huge application potential in the field of high-power laser illumination.

Description

technical field

[0001] The application relates to a fluorescent ceramic and its preparation method and application, belonging to the field of fluorescent ceramic materials. Background technique

[0002] As the blue light LD technology matures, the concept of laser lighting is also proposed. In 2012, OSRAM and BMW first installed laser lighting lamps in the BMW i8 car. The heat of laser lighting research has also increased. Laser white light source has the advantages of high brightness, fast response speed and long transmission distance, and is widely used in remote lighting fields such as automotive lighting, display, industrial lighting and high-speed rail ships.

[0003] However, as the lumen density continues to increase, higher requirements are placed on light conversion materials. At present, the requirements of laser lighting for fluorescent materials mainly include high quantum efficiency, high thermal conductivity, good thermal shock resistance, and good temperatur...

Examples

Embodiment 1

[0104] Lu 2.975 Ce 0.005 Ba 0.02 al 4.98 Si 0.02 o 12 (x=0.005, y=0.02) and preparation method thereof

[0105] Activated ion Ce 3+ The concentration is 0.5at.%, Ba 2+ and Si 4+ The doping concentration is 2 at.%. Commercially available Lu with a purity of 99.99% 2 o 3 , Al 2 o 3 , CeO 2 , BaCO 3 and SiO 2 Raw material powder according to stoichiometric ratio Lu 2.975 Ce 0.005 Ba 0.02 al 4.98 Si 0.02 o 12 Weigh it, use absolute ethanol as the ball milling medium, and mill it on a high-energy ball mill for 30 hours at a ball milling speed of 60 rpm / min. The ball-milled slurry was dried and sieved, followed by dry pressing and cold isostatic pressing to obtain a ceramic green body. The green body was sintered in a hot-press furnace at a temperature of 1750°C and a pressure of 50 MPa for 5 hours. The sintered ceramic samples were annealed in a carbon monoxide atmosphere at 1450°C for 10 hours, then mechanically thinned and polished to obtain LuAG: 0.5% Ce, 2...

Embodiment 2

[0107] Lu 2.989 Ce 0.001 Ba 0.01 al 4.99 Si 0.01 o 12 (x=0.001, y=0.01) and preparation method thereof

[0108] Activated ion Ce 3+ The concentration is 0.1at.%, Ba 2+ and Si 4+ The doping concentration is 1 at.%. Commercially available Lu with a purity of 99.99% 2 o 3 , Al 2 o 3 , CeO 2 , BaCO 3 and SiO 2 Raw material powder according to stoichiometric ratio Lu 2.989 Ce 0.001 Ba 0.01 al 4.99 Si 0.01 o 12 Weigh, use absolute ethanol as the ball milling medium, and mill at a milling speed of 120 rpm / min for 15 hours. The ball-milled slurry was dried and sieved, followed by dry pressing and cold isostatic pressing to obtain a ceramic green body. The green body was sintered in a vacuum furnace at a temperature of 1800°C for 5 hours. The ceramic samples obtained by vacuum sintering were annealed in an air atmosphere at 1500°C for 8 hours, then mechanically thinned and polished to obtain LuAG: 0.1% Ce, 1% Ba, 1% Si fluorescent transparent ceramics with a diame...

Embodiment 3

[0110] Lu 2.975 Ce 0.015 Ba 0.005 Mg 0.005 al 4.99 Si 0.01 o 12 (x=0.015, y=0.01) and preparation method thereof

[0111] Activated ion Ce 3+ The concentration is 1.5at.%, Ba 2+ with Mg 2+ The concentration of combined doping is 0.5at.% and 0.5at.%, respectively, Si 4+ The doping concentration is 1 at.%. Commercially available Lu with a purity of 99.99% 2 o 3 , Al 2 o 3 , Ce 2 (CO 3 ) 3 , BaCO 3 , MgO and SiO 2 Raw material powder according to Lu 2.975 Ce 0.015 Ba 0.005 Mg 0.005 al 4.99 Si 0.01 o 12 The chemical formula was weighed, and absolute ethanol was used as the ball milling medium, and ball milled on a high-energy ball mill for 5 hours with a ball milling speed of 300 rpm / min. After the ball-milled slurry was dried and sieved, the ceramic green body was obtained by dry pressing and cold isostatic pressing in sequence, and the green body was sintered in a vacuum furnace at a sintering temperature of 1750°C for 20 hours. The ceramic sample obta...

technical field

[0001] The application relates to a fluorescent ceramic and its preparation method and application, belonging to the field of fluorescent ceramic materials. Background technique

[0002] As the blue light LD technology matures, the concept of laser lighting is also proposed. In 2012, OSRAM and BMW first installed laser lighting lamps in the BMW i8 car. The heat of laser lighting research has also increased. Laser white light source has the advantages of high brightness, fast response speed and long transmission distance, and is widely used in remote lighting fields such as automotive lighting, display, industrial lighting and high-speed rail ships.

[0003] However, as the lumen density continues to increase, higher requirements are placed on light conversion materials. At present, the requirements of laser lighting for fluorescent materials mainly include high quantum efficiency, high thermal conductivity, good thermal shock resistance, and good temperatur...

Examples

Embodiment 1

[0104] Lu 2.975 Ce 0.005 Ba 0.02 al 4.98 Si 0.02 o 12 (x=0.005, y=0.02) and preparation method thereof

[0105] Activated ion Ce 3+ The concentration is 0.5at.%, Ba 2+ and Si 4+ The doping concentration is 2 at.%. Commercially available Lu with a purity of 99.99% 2 o 3 , Al 2 o 3 , CeO 2 , BaCO 3 and SiO 2 Raw material powder according to stoichiometric ratio Lu 2.975 Ce 0.005 Ba 0.02 al 4.98 Si 0.02 o 12 Weigh it, use absolute ethanol as the ball milling medium, and mill it on a high-energy ball mill for 30 hours at a ball milling speed of 60 rpm / min. The ball-milled slurry was dried and sieved, followed by dry pressing and cold isostatic pressing to obtain a ceramic green body. The green body was sintered in a hot-press furnace at a temperature of 1750°C and a pressure of 50 MPa for 5 hours. The sintered ceramic samples were annealed in a carbon monoxide atmosphere at 1450°C for 10 hours, then mechanically thinned and polished to obtain LuAG: 0.5% Ce, 2...

Embodiment 2

[0107] Lu 2.989 Ce 0.001 Ba 0.01 al 4.99 Si 0.01 o 12 (x=0.001, y=0.01) and preparation method thereof

[0108] Activated ion Ce 3+ The concentration is 0.1at.%, Ba 2+ and Si 4+ The doping concentration is 1 at.%. Commercially available Lu with a purity of 99.99% 2 o 3 , Al 2 o 3 , CeO 2 , BaCO 3 and SiO 2 Raw material powder according to stoichiometric ratio Lu 2.989 Ce 0.001 Ba 0.01 al 4.99 Si 0.01 o 12 Weigh, use absolute ethanol as the ball milling medium, and mill at a milling speed of 120 rpm / min for 15 hours. The ball-milled slurry was dried and sieved, followed by dry pressing and cold isostatic pressing to obtain a ceramic green body. The green body was sintered in a vacuum furnace at a temperature of 1800°C for 5 hours. The ceramic samples obtained by vacuum sintering were annealed in an air atmosphere at 1500°C for 8 hours, then mechanically thinned and polished to obtain LuAG: 0.1% Ce, 1% Ba, 1% Si fluorescent transparent ceramics with a diame...

Embodiment 3

[0110] Lu 2.975 Ce 0.015 Ba 0.005 Mg 0.005 al 4.99 Si 0.01 o 12 (x=0.015, y=0.01) and preparation method thereof

[0111] Activated ion Ce 3+ The concentration is 1.5at.%, Ba 2+ with Mg 2+ The concentration of combined doping is 0.5at.% and 0.5at.%, respectively, Si 4+ The doping concentration is 1 at.%. Commercially available Lu with a purity of 99.99% 2 o 3 , Al 2 o 3 , Ce 2 (CO 3 ) 3 , BaCO 3 , MgO and SiO 2 Raw material powder according to Lu 2.975 Ce 0.015 Ba 0.005 Mg 0.005 al 4.99 Si 0.01 o 12 The chemical formula was weighed, and absolute ethanol was used as the ball milling medium, and ball milled on a high-energy ball mill for 5 hours with a ball milling speed of 300 rpm / min. After the ball-milled slurry was dried and sieved, the ceramic green body was obtained by dry pressing and cold isostatic pressing in sequence, and the green body was sintered in a vacuum furnace at a sintering temperature of 1750°C for 20 hours. The ceramic sample obta...

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