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APT中掺杂Na、Li元素对粗晶碳化钨及合金性能的影响   总被引:1,自引:0,他引:1  
张湘  刘铁梅 《硬质合金》2007,24(2):74-79
本文研究了在APT中掺杂不同量的Na、Li元素对黄钨、钨粉、碳化钨、合金性能的影响。研究发现:掺杂Na元素不但可以提高钨粉的粒度而且可以提高其均匀性,掺杂Li元素的APT能明显提高黄钨与钨粉的颗粒度,但残留在钨粉中的Li元素对碳化钨、合金的性能有负面影响。  相似文献
2.
Fluorescence and cofluorescence properties of Tb(Ⅲ) solid complexes were studied using pyromellific acid (PMA) as ligand and fluorescence inert ions as doping elements. The cofluorescence enhancement, a result of ligand sensi-tized fluorescence, was observed in Th(Ⅲ) solid complexes doped with fluorescent inert ions La(Ⅲ), Gd(Ⅲ), Ca(Ⅲ), and Sr(Ⅲ). The effect of the type and content of doping elements on fluorescence enhancement was studied, and optimum con-ditions were determined. The results show that Gd (La, Ca, Sr) has clear cofluorescence effect in solid complex Tb-M-PMA system, and in present work, rare earth complex fluorescent powder that emits bright green fluorescence at ultraviolet exci-tation was obtained, which had potential application as fluorescent anti-counterfeit ink,  相似文献
3.
Fluorescence and cofluorescence properties of Tb(Ⅲ) solid complexes were studied using pyromellitic acid (PMA) as ligand and fluorescence inert ions as doping elements. The cofluorescence enhancement, a result of ligand sensitized fluorescence, was observed in Tb(Ⅲ) solid complexes doped with fluorescent inert ions La(Ⅲ), Gd(Ⅲ), Ca(Ⅲ), and Sr(Ⅲ). The effect of the type and content of doping elements on fluorescence enhancement was studied, and optimum conditions were determined. The results show that Gd (La, Ca, Sr) has clear cofluorescence effect in solid complex Tb-M-PMA system, and in present work, rare earth complex fluorescent powder that emits bright green fluorescence at ultraviolet excitation was obtained, which had potential application as fluorescent anti-counterfeit ink.  相似文献
4.
针对纯铂微细丝的加工难点,探讨了在有微量元素R存在时强化型纯铂微细丝的原料纯度和微观形貌,以及微细丝的研制方法,并就强化型微细丝和海绵铂微细丝的有关性能进行了对比;研制的强化型纯铂微细丝,其热电性能符合国家标准,满足用户需求。  相似文献
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