PREPARATION METHOD FOR CERAMIC COMPOSITE MATERIAL, CERAMIC COMPOSITE MATERIAL, AND WAVELENGTH CONVERTER

WIPO Patent Application WO/2018/103481

A1

A preparation method for a ceramic composite material, a ceramic composite material, and a wavelength converter. The preparation method comprises the steps of: respectively formulating an aluminium salt solution and fluorescent powders in a mass ratio of Al2O3 to the fluorescent powders of (0.1-1):100; dispersing the fluorescent powders into a buffer solution having a pH of 4.5-5.5 to obtain a suspension; performing titration of the suspension by means of the aluminium salt solution to obtain fluorescent powders coated by Al2O3 hydrate film; calcining the fluorescent powders coated by Al2O3 hydrate film to obtain fluorescent powders coated by Al2O3; mixing aluminium oxide powders with a particle size of 0.1 μm-1 μm and aluminium oxide powders with a particle size of 1 μm-10 μm in a molar ratio of 100:(0.1-5) to obtain mixed aluminium oxide powders; mixing the fluorescent powders coated by Al2O3 and the mixed aluminium oxide powders to obtain mixed powders, the fluorescent powders coated by Al2O3 being present in an amount of 40％-90％ based on the weight of the mixed powders; and pre-pressing, and sintering the mixed powders to obtain the ceramic composite material.

LI QIAN (CN)
XU YANZHENG (CN)

PCT/CN2017/109317

June 14, 2018

November 03, 2017

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APPOTRONICS CHINA CORP (CN)

C04B35/10; C01F7/028; H01L33/50

CN106206904A	2016-12-07
CN105906328A	2016-08-31
CN105753457A	2016-07-13

See also references of EP 3553041A4

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