Synthesis of Red‐Emitting, Small Particle Size Luminescent Oxides Using an Optimized Combustion Process
Synthesis of Red‐Emitting, Small Particle Size Luminescent Oxides Using an Optimized Combustion Process
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DOI：
10.1111/j.1151-2916.1996.tb08103.x
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发表时间：
1996-12
影响因子：
3.9
通讯作者：
L. Shea;J. McKittrick;O. A. Lopez;E. Sluzky
中科院分区：
文献类型：
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作者：
L. Shea;J. McKittrick;O. A. Lopez;E. Sluzky
研究了一种新型的陶瓷合成技术——燃烧合成技术，制备了具有较好物理性能和发光性能的Cr{sup 3+}掺杂Y{sub 3}Al{sub 5}O{sub 12}和Eu{sup 3+}掺杂Y{sub 2}O{sub 3}发红荧光粉。该技术涉及金属硝酸盐（氧化剂）和有机燃料（尿素，碳酰肼，甘氨酸）在500℃下的反应，所得粉末结晶良好，具有大表面积和小粒度。光谱能量分布采用光致发光测量。研究了燃料种类、燃料与氧化剂比、炉温、炉内含水率等工艺参数的影响。随着反应温度的升高，荧光粉的亮度增加。热处理（1000、1300和1600℃）提高了合成粉末的发光强度。研究了残余碳含量和铬位对称性可能是热处理温度升高导致亮度增加的原因。通过调整反应化学，确定了生产最发光荧光粉的最佳条件。
A novel ceramic synthesis technique, combustion synthesis, was explored to produce red-emitting Cr{sup 3+}-doped Y{sub 3}Al{sub 5}O{sub 12} and Eu{sup 3+}-doped Y{sub 2}O{sub 3} phosphors with improved physical and luminescent properties. This technique involves the reaction of metal nitrates (oxidizers) and an organic fuel (urea, carbohydrazide, glycine) at 500 C. Resulting powders are well-crystallized, with a large surface area and small particle size. The spectral energy distribution was observed using photoluminescence measurements. The effects of processing parameters such as type of fuel, fuel-to-oxidizer ratio, furnace temperature, and batch water content were studied. An increase in phosphor brightness with increasing reaction temperature was observed. Postreaction heat treatments (1000, 1300, and 1600 C) increased the luminous intensity of as-synthesized powders. Residual carbon content and chromium site symmetry were investigated as possible explanations for the increase in brightness with increasing heat treatment temperature. By tailoring the reaction chemistry, the optimal conditions for producing the most luminescent phosphors have been identified.