中文摘要：

本文采用纳米EuB6和Eu2O3粉末为激活剂原料,提出了一步法和两步法,在常压条件下制备获得了CaAlSiN3：Eu^2＋红色荧光粉.对不同掺杂Eu浓度（2%—10%）的样品进行了晶体结构、形貌、发光性能的分析研究.根据能谱与X射线衍射图谱（XRD）分析可知,两步法合成的样品随Eu浓度的增加晶胞体积会逐渐增大,且样品中B的含量增加;而一步法合成的样品随Eu浓度增加晶胞体积先增大后减小,且B含量相对上面的样品含量较少,O含量却较大.另外,在460 nm蓝光激发下,两步法合成的样品（纳米EuB6掺杂）的发射最强峰在652—680 nm范围,而一步法合成的样品（纳米Eu2O3掺杂）的发射最强峰只在630—637 nm范围,且前者的荧光相对强度都强于后者.结合XRD以及荧光光谱数据可以认为两种常压氮化制备方法都会让B元素引入到基质中,B的引入不但降低基质中O的含量,而且改变Eu^2＋离子的晶体场环境从而调节CaAlSiN3：Eu^2＋荧光粉的发光峰位.结合绿光发射荧光粉和纳米EuB6掺杂的Ca0.94AlSiN3：0.06Eu^2＋荧光粉在蓝光芯片激发下可以获得色温在3364 K,显色指数可以达到91的暖白发光二极管器件.本实验采用的方法简单,避免使用昂贵复杂的气压烧结设备以及还原性气体烧结设备,有望实现工业化应用以及降低生产成本.

英文摘要：

In this paper, we propose one-step and two-step process under atmospheric pressure condition for synthesizing the CaAlSiN3：Eu^2＋ red phosphors by using nano-sized EuB6 and Eu2O3 as raw doping and activator materials. Moreover,the crystal structures, morphologies and luminescence properties of different-doped-Eu-concentration（2%–10%） samples are characterized in detail. According to energy dispersive spectrometer and X-ray diffraction（XRD） results, the cell volume and B content will gradually increase with the increase of the Eu concentration（2%–10%） for the sample prepared by two-step process. In contrast, the cell volume decreases with increasing the Eu concentration for the one-step prepared sample. Meanwhile, B content in the sample is less than that in the sample mentioned above and O content becomes larger. In addition, under the 460-nm blue light excitation, the two-step synthesized samples（nano EuB6 doped） has the highest emission peak in the 652–680 nm range, however, the sample by one-step synthesis（nano Eu2O3 doped） has strong emission peak only in the 630–637 nm range. Moreover, the intensity of fluorescence of the former one is stronger than that of the latter one. Both XRD and fluorescence spectra show that boron element can be introduced into the matrix by using two-step methods under atmospheric nitrogen. The introduction of boron not only reduces the oxygen content in the matrix but also changes the crystal field around Eu ions to adjust CaAlSiN3：Eu^2＋ phosphor luminescence peak position. Combining XRD and fluorescence spectral analysis, it is believed that boron element is introduced into the host by the two preparation methods of atmospheric nitrogen. The introduction of boron not only reduces the oxygen content in the matrix but also changes the crystal field environment of Eu^2＋ ions, and thus adjusting the luminescence peak position of Ca0.94AlSiN3：Eu^2＋ phosphor. Blue LED excitation of combined green-emitting phosphor and Ca0.94AlSiN3：0.06Eu^2＋ p