排序方式: 共有97条查询结果,搜索用时 31 毫秒
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湿化学法制备铁-钛系列随角异色功能颜料 总被引:2,自引:1,他引:1
采用具有干涉色的云母钛作为基质材料,通过湿化学法制备随角异色功能颜料。用XRD,多角度色度仪,改进的紫外可见分光光度计对产物进行测试分析,研究了原料的预处理及实验条件对颜料随角异色效果的影响。结果表明,在经过预处理的干涉色云母钛表面包覆氧化铁膜,能够制得变色效果较好的随角异色颜料,制备此种颜料的最佳反应条件是:反应温度70~80℃,pH2.8~3.5之间,加料速度1~2滴/min,煅烧温度850℃,煅烧时间40min,改变云母钛的干涉色可以制得多种颜色的随角异色颜料。 相似文献
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Trivalent rare-earth ions (La3+,Pr3+,Nd3+,Sm3+,Gd3+,Tb3+,Dy3+,Ho3+,Er3+,Tm3+,and Yb3+) were investigated as the codoped auxiliary sensitizer for the electron trapping materials SrS:Eu2+ in order to enhance the fluorescence properties.It was found that Sm3+ and Tb3+ had the best photoluminescence stimulated luminescence (PSL) effect among the selected trivalent rare-earth ions.All the SrS:Eu2+ samples doped by different trivalent rare-earth ions could be stimulated by 980 nm laser after being exposed to the conventional sunlight,and they emitted PSL with the peak located at 615 nm.The result also indicated that some co-doped rare earth ions could increase fluorescence intensities of the traditional electron trapping materials SrS:Eu2+. 相似文献
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芦荟系百合科,属多年生多肉质常绿草本植物,芦荟多糖是芦荟的主要生物活性成份,其含量是芦荟制品的重要理化检验指标之一,芦荟多糖主要存在于凝胶类制品中。测定芦荟多糖的标准方法是沿用多年的苯酚-硫酸显色分光光度法,但是此方法选择性较差,芦荟制品当中的一些掺假物如麦芽糊精、蔗糖和葡萄糖等严重干扰测定,因此不能对芦荟制品的质量进行有效监控。本文参考中华人民共和国行业标准《化妆品用芦荟制品Q B/T2488-2000》,并结合我们开展的北京市植物资源研究开发重点实验室(暨国家轻工业芦荟制品检测中心)资助课题的研究结果,提出了一种更… 相似文献
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报道了水热静态晶化法制备超微NaA、八面沸石的方法。系统地研究了制备条件对沸石粒度的影响。实验中发现原料配比、盐效应、陈化和晶化等是超微粒沸石合成的关键因素。X射线小角衍射和扫描电镜分析表明,NaA沸石平均粒度为62nm,八面沸石平均粒度为76nm。 相似文献
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The strong yellow upconversion (UC) light emission was observed in Ho3+/Yb3+co-doped Gd2Mo3O9 phosphor under the excitation of 980 nm diode laser. The phosphors were synthesized by the traditional soli... 相似文献