余辉时间 meaning in English
after time
afterglow time
persistence
Examples
- The luminous intensity of phosphor - powder synthesized by this method is 32mcd / m2 after the sample was excitated 300s , and the decay time of the sample is 350min
该法制备出的发光粉激发后300s时的余辉强度32mcd m ~ 2 ，测量余辉时间为350min 。 - Eu2 + ion activated strontium aluminate phosphors are a kind of photoluminescent materials with high brilliance , long afterglow and stable performance
稀土铕离子掺杂的铝酸锶基质发光材料是一类发光亮度高、余辉时间长、性能稳定的长余辉发光材料。 - This type of long persistent phosphor has the advantages of innocuity , no radioactivity , high luminescence , long duration and no need of electricity , so it can be regarded as high efficiency solid display material
它无毒、无放射性、亮度高、余辉时间长、不消耗电能，是一种高效节能的固体发光显示材料。 - We researched the influences of systhesis temperature , heat preservation time , eu + concentration , reduction surrounding feeling and flux on luminescent properties of sral2o4 : eu2 + phosphors , optimized the experiment conditions and reduced systhesis temperature about 100 c . we found that the systhesized sample ' s luminescent brightness is better with increasing systhesis temperature , but the phase component is more complex . we found that the luminescence brightness of sample appear a increasing process at first , and then a reducing one with the raise of eu2 + concentration , it indicated that the luminescence brightness is not better if the eu2 + concentration is too high or low . we found that the systhesized sample can not bright at too long heat preservation time , and the luminescence brightness is lower at too short heat preservation time . we found that particle diameter is bigger , the wavelength of emission peak is longer
研究发现合成温度高，合成样品的发光效果好，但物相组成也较复杂； eu ~ ( 2 + )离子在一定掺杂浓度范围内，合成样品的发光亮度先是出现一个提高过程，然后是一个降低过程，说明eu ~ ( 2 + )离子浓度高或低都不利于合成样品发光；保温时间较长，合成样品不发光，保温时间较短，合成样品发光效果不好，只有合适的保温时间才能合成发光效果好的样品；合成样品的粒径大小与发射峰的位置具有一定的关系，粒径越大，发射峰越偏向长波方向；助熔剂对样品的合成温度和发光性能都有影响，助熔剂的量较低时，主要表现为助熔作用，对发光影响不大，助熔剂的量较高时，使得样品发光亮度降低和余辉时间缩短；还原方式的不同，合成样品的发光性能也不一样。 - The study indicate that sral2o4 : tb3 + phosphor can be composed from 1250c to 1550c , the phosphor ' s luminance reduce and the afterglow time shorten along with the compounding temperature ; the better luminance and afterglow with the better crystalloid degree ; the luminescence of tb3 + ion in the sral2o4 is coming from the transition of 5d4 - 7fj ( j = 6 , 5 , . . . . . . 0 ) ; the afterglow is because of the electron that seized in the trap released which integrate with the luminescence center
合成发光体亮度随合成温度的降低而逐渐降低，余辉时间逐渐缩短；当合成物具有较好的结晶度时，合成的发光粉不仅发光亮度高而且余辉时间长； tb ~ ( 3 + )离子在sral _ 2o _ 4基质晶格中的发光主要来自于~ 5d _ 4 ~ 7f _ j ( j = 6 ， 5 ， … … 0 )的跃迁；其余辉是因为不断有被陷阱所俘获的电子释放出来与发光中心复合。