Fluorescent ceramic with aluminum nitride matrix and preparation method of fluorescent ceramic: Fid-Bau Portal

Fluorescent ceramic with aluminum nitride matrix and preparation method of fluorescent ceramic

LIN WEIYI / LIN WUCHENG / LIU WEIPING / CHEN ZHI

The present invention discloses an aluminum nitride matrix fluorescent ceramic and a preparation method thereof, and relates to the technical field of luminescent materials, the aluminum nitride matrix fluorescent ceramic comprises 50-70 wt% of modified aluminum nitride, 20-60 wt% of fluorescent powder and 1.0-5.0 wt% of a sintering aid, the general formula of the fluorescent powder is (Ce, La) FCO3 (x): Eu (y)-Y (z), x is 0.01-0.5, y is 0.05-0.4, z is 0.05-0.3, the particle size of the aluminum nitride is 0.1-2 [mu] m, and the particle size of the sintering aid is 0.1-2 [mu] m. The particle size of the fluorescent powder is 10-30 microns, and the particle size of the sintering aid is 0.05-1 micron. The sintering aid is one or more of calcium fluoride, magnesium oxide, calcium oxide, yttrium oxide, silicon dioxide and trisilicon nitride, preferably a mixture of trisilicon nitride and silicon oxide, the fluorescent powder is prepared from nano-scale metal oxide powder and rare earth elements as raw materials to prepare sol, gel is prepared, and then stirring, drying, heat treatment and crushing are performed to obtain the fluorescent powder. The nanoscale fluorescent powder is obtained.

本发明公开了一种氮化铝基质的荧光陶瓷及其制备方法，涉及发光材料技术领域，包括改性氮化铝、荧光粉、烧结助剂，改性氮化铝的含量为50～70wt％，荧光粉的含量为20～60wt％，烧结助剂为1.0～5.0wt％，所述荧光粉的通式为(Ce，La)FCO3(x):Eu(y)‑Y(z)，x＝0.01～0.5，y＝0.05～0.4，z＝0.05～0.3，所述氮化铝的粒径为0.1～2μm，荧光粉的粒径为10～30μm，烧结助剂的粒径为0.05～1μm。所述烧结助剂为用氟化钙、氧化镁、氧化钙、氧化钇、二氧化硅、四氮化三硅中的一种或多种，优选为四氮化三硅和氧化硅的混合物，所述荧光粉用纳米级的金属氧化物粉末、稀土元素为原料配制溶胶，配制出凝胶，再通过搅拌、烘干、热处理、粉碎，得到纳米级荧光粉。

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