第3385章

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    高分辨TEM可直接获得晶格条纹像,甚至单原子像。
    SEM成像原理则是聚焦电子束在样品表面扫描,激发二次电子、背散射电子等信号。
    二次电子来自样品表层5–10nm,反映表面形貌。
    背散射电子来自深层,强度与原子序数正相关,用于成分分析。
    这两种高分辨绿色电镜的成像原理就注定了一点,这设备依赖场发射电子枪,其核心是纳米级氧化锆涂层的单晶钨灯丝。
    但现在问题来了。
    国内现有的钨灯丝根本没办法承受2500度的高温,会导致电子束能量分散单色差以及分辨率受限。
    夏黎坐在长长的大书桌后,足足想了5秒钟。
    最后拍板决定,有问题找组织。
    单晶钨灯丝这事儿属于材料范围,她真的解决不了,还是让夏所长找人进口吧。
    国外虽然封锁华夏的科技,但也只是封锁技术,像单晶钨灯丝这种东西算是可以被倾销的商品。
    只要华夏这边愿意打钱,相信米国那边也不会连个灯丝都不卖。
    夏黎当即打电话,联系了夏所长那边,提出想让夏所长进口一些单晶钨灯丝,以及高级透镜。
    只要这两种东西到位,可以看到原子级别的高分辨率射电镜很快就能造出来。
    夏所长也没想到夏黎刚刚还嚷嚷着难受,现在就又搞起科研项目来了,心中对夏黎这兢兢业业的卫道者形象更加敬仰。
    听到夏黎说要制造什么后,他整个人都精神起来。
    虽然他不知道夏黎要的这些具体东西的作用,但他知道能看到原子的射电镜到底有多贵多难得啊!
    华夏因为技术设限,造原子弹的时候用的只是佘山40m折射镜,这玩意儿根本就没办法真切地观测到原子反应。
    等到59年代初期,才从国外费劲巴力地引进了一台无自主射电望远镜,这玩意儿不但贵,还因为国外技术封锁,根本不好往国内弄。
    这要是国内真能制造出来可以观测原子的设备,那得给华夏省多少钱?又推进了华夏多少研发项目!?
    夏所长当即就一口答应了夏黎会和组织反映,想办法进口一些单晶钨灯丝,以及高倍透镜的事。
    夏黎得了准信儿,便放下电话开始继续搞其他部分的研究。
    然而,10分钟不到的时间,夏所长的电话就打回来了。
    “师长,夏所长电话。”
    接起电话的胡凤花和夏黎招呼了一声,让夏黎来接电话。
    夏黎只以为夏所长这时候打电话是想问他一些进口材料的具体细节,便走过去接起了电话。
    却没想到,电话那头传来夏所长有些吱呜的声音,“那个,小夏啊,我想问一下你,咱们如果要是进口单晶钨灯丝的进口多少条?
    目前国际上单晶钨灯丝的价格大概是在几万块华夏币一条,如果要是咱们搞实验的话,最少得用多少条才行?
    你先跟我报备一下,我心里也好有个数,咱们再进口。”
    夏所长说话的语气,嘴里就跟嚼着黄连说话一样。
    夏黎在这头隔着电话都能听出来,他那宛如穷苦大众对于不得不买奢侈品的心酸。
    那苦兮兮的模样,听者伤心,见者流泪,哪怕一句诉苦都没说,但隔着电话,夏黎就有种家里穷的揭不开锅了,但她考上了大学,老夏砸锅卖铁都想要供他上大学,家里却真的没有这份钱,他下一步就想卖血也要让她上大学的心酸。
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