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ͨ¹ýµ÷½Ú»ùÖÊ×é·Ö±ÈÀý£¬Ñо¿ÁËSrAl2xO3x+1:Eu2+,Dy3+£¨x=1~2£©Ó«¹â·Û¾§Ìå½á¹¹£¬·¢¹âÐÔÖʼ°³¤Óà»ÔÌØÐÔ¡£Ñ¡È¡ÏõËáïȺÍÏõËáÂÁ×÷Ϊ»ùÖÊÔ²ÄÁÏ£¬ÅðËá°±ºÍ·ú»¯ÂÁ×÷ΪÖúÈܼÁ£¬²ÉÓÃÑôÀë×Ó²ÝËáÑι²³Áµí¡¢Êª·¨»ìºÏ¼°·Ö²½ºÏ³ÉµÈ·½·¨£¬ÖƱ¸ÁËÁÁ¶È¸ß¡¢Óà»Ô³¤¼°Á¼ºÃÁ£¾¶·Ö²¼µÄϵÁг¤Óà»Ô·¢¹â²ÄÁÏ¡£»ùÓÚ¶ÔÑùÆ·XÉäÏßÑÜÉäͼÆ×£¬¼¤·¢¡¢·¢Éä¹âÆ×ºÍÓà»ÔË¥¼õÇúÏß²âÁ¿¼°·ÖÎö£¬·¢ÏÖSrAl2xO3x+1: Eu2+,Dy3+¾ßÓÐÁ¼ºÃµÄ½á¾§×´Ì¬£»ËæxÔö¼Ó£¬·¢Éä¹âÆ×·åÖµ´Ó520nmÀ¶ÒÆÖÁ470nm£»Ë¥¼õµ½¿É±æÈÏ·¢¹âÇ¿¶È0.32mcd/m2Óà»Ôʱ¼ä¿ÉÏàÓ¦µØ´Ó30hÑÓ³¤µ½60hÒÔÉÏ¡£±íÏÖ²»Í¬Óà»ÔÌØÐÔµÄÖ÷ÒªÔÒòÊÇEu2+ÔÚ»ùÖÊÖоßÓв»Í¬Å¨¶È¡¢²»Í¬Ë¥¼õËٶȵÄÀ¶¡¢ÂÌÁ½ÖÖ·¢¹âÖÐÐÄÔì³ÉµÄ£¬ÆäÖÐÀ¶·¢¹âÖÐÐÄÊÙÃüÃ÷ÏÔ¸ßÓÚÂÌ·¢¹âÖÐÐÄ¡£ By adjusting the proportion of components, fluorescence crystal structure, luminescent properties and long afterglow characteristics of SrAl2xO3x+1: Eu2+, Dy3+(x=1~2) were studyied. Strontium nitrate and aluminum nitrate as a matrix of raw materials, then ammonia and aluminum fluoride boric acid as a cosolvent, we used cationic oxalate coprecipitation, wet mixing, synthesis method and step-by-step method to prepare a series of long afterglow luminescent materials with high-brightness, long afterglow and good size distribution. Based on X-ray diffraction pattern of sample, excitement and emission spectra and afterglow decay curve measurement, we found that SrAl2xO3x +1: Eu2+, Dy3+ has a good crystalline state. With x increasing, AES peak moved from 520nm to 470nm; afterglow time for attenuation to recognizable luminous intensity of 0.32mcd/m2 can be extended from 30h to 60h. The characteristics of different afterglow are mainly due to Eu2+ in matrix with different concentrations, different decay rate of blue and green radiation centers. The blue light-emitting center was significantly higher than the green one. |

6Â¥2009-08-24 11:08:11
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2Â¥2009-08-23 10:56:55
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168yjh(½ð±Ò+5,VIP+0):лл²ÎÓë 8-24 17:55
168yjh(½ð±Ò+5,VIP+0):лл²ÎÓë 8-24 17:55
| By adjusting the matrix component proportion£¬research the phosphor crystal structure of SrAl2xO3x+1:Eu2+,Dy3+£¨x=1~2£©, luminance and persistence characteristic.Select strontium nitrate and aluminium nitrate as stroma materials, use AmmoniumBorate and aluminium fluoride as latent solvent, synthesis series of long-lasting phosphor by the stepwise synthesis and co-precipitates of oxalates ,wet-mixing. the long-lasting phosphor in the paper having the qualities of High brightness,long afterglow, Good particle size distribution. |

3Â¥2009-08-23 13:15:42
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- ½ð±Ò: 800.3
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- ×¢²á: 2007-12-05
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- רҵ: Ò©Îﻯѧ

4Â¥2009-08-23 13:34:58














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