An integrated ceramic material for light conversion and heat dissipation for reflective laser display and its preparation method
A ceramic material, laser display technology, applied in the field of laser display, can solve the problems of not greatly improving thermal conductivity, fluorescence loss, complex structure, etc., achieve high thermal conductivity, enhance light efficiency, improve weather resistance and luminous stability Effect
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Embodiment 1
[0042] Preparation wavelength conversion ceramic, accurately weighed 12.2352g a purity of 99.99% α-Al 2 O 3 Powder, 6.3230 g of 99.995% purity Y 2 O 3 Powder, 18.7050 g of 99.99% purity Gd 2 O 3 Powder, 0.0688g of purity of 99.99% CeO 2 Powder was added 0.1861 g of high purity TEOS as a sintering aid agent, the blending thoroughly mixed using a planetary mill, the rotational speed of 180r / min. 45 ml of anhydrous ethanol is used as milling media, a planetary mill speed of 200 r / min, the milling time was 12 hours. After drying in a constant temperature 60 ℃ oven for 24 hours, milled and passed through a 200 mesh sieve. The powder is carried out at a pressure 15MPa axial pre-molding, followed by cold isostatic pressing, a pressure of 200MPa, to obtain a dense biscuit. Green vacuum sintering reaction technique, was heated to 1600 deg.] C, held for 10 hours, and a vacuum of 10 -3 PA. After cooling with the furnace annealing process in an annealing furnace 1450 ℃, the laser excitati...
Embodiment 2
[0044] Preparation wavelength conversion ceramic, accurately weighed 13.4587g a purity of 99.99% α-Al 2 O 3 Powder, 4.5164 g of 99.995% purity Y 2 O 3 Powder, 17.0375 g of 99.99% purity Gd 2 O 3 Powder, 0.1721 g of a purity of 99.99% CeO 2 Powder was added 0.1751 g of high purity TEOS as a sintering aid agent, the blending thoroughly mixed using a planetary mill, the rotational speed of 220r / min. 45 ml of anhydrous ethanol is used as milling media, a planetary mill speed of 200 r / min, the milling time was 12 hours. After drying in a constant temperature 60 ℃ oven for 24 hours, milled and passed through a 200 mesh sieve. The powder is carried out at a pressure 15MPa axial pre-molding, followed by cold isostatic pressing, a pressure of 200MPa, to obtain a dense biscuit. Green vacuum sintering reaction technique, was heated to 1750 deg.] C, incubated for 15 hours, and a vacuum of 10 -3 PA. After cooling with the furnace annealing process in an annealing furnace 1450 ℃, the laser ...
Embodiment 3
[0046] Preparation reflective layer ceramic, accurately weighed 20.1881 g of 95% pure α-Al 2 O 3 Powder, 0.7250 g of Gd purity of 99.5% 2 O 3 Powder, 25 ml of anhydrous ethanol is used as milling media, a planetary mill speed of 200 r / min, the milling time was 6 hours. After drying in a constant temperature 60 ℃ oven for 24 hours, and milled through 80 mesh sieve. Axial pre-molding the powder at 15MPa pressure to obtain a green. Green incubated for 2 hours at 1450 deg.] C, furnace cooling to obtain a ceramic reflective layer. High reflectance in the visible wavelength band at 95%, the thermal expansion coefficient of 8.2 х 10 -6 K -1 A thermal conductivity of 33 W / m · K.
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