1) beryllium
[英][be'riliəm] [美][bɛ'rɪlɪəm]
铍
1.
Graphite Furnace Atomic Absorption Spectrophotometer in Detecting Beryllium in the Air of Workplaces;
作业场所空气中铍的石墨炉原子吸收光谱检测法
2.
The Cation Interferences in Determination of Trace Beryllium by Graphite Furnace Atomic Absorption Spectrometry;
GFAAS测定微量铍的阳离子干扰研究
3.
Effect of aging treatment on residual resistance ration of beryllium;
时效处理对金属铍剩余电阻比的影响
2) Be
[英][bi] [美][bɪ]
铍
1.
Technology for Fast Electroless Ni-P Alloy Plating on Beryllium and Properties of the Coating;
铍基体快速化学镀Ni-P合金工艺研究
2.
DETERMINATION OF Be IN WATER WITH GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROMETRY;
原子吸收石墨炉法测定水中铍
3.
A Retrospective Epidemiological Survey About Occupational Tumor in Workers Exposed to Be;
铍作业工人职业肿瘤的回顾性流行病学调查
3) berllium
铍(Be)
4) Beryllium material
铍材
1.
The testing method and effects of C p (the specific heat content) and λ (the thermal conductivity) of isostatic pressed beryllium material by using laser thermal conducting instrument were introduced.
介绍了用激光热导仪对等静压铍材的热导率、比热进行测试的方法及测试结果。
5) beryllium salt
铍盐
1.
Trace phosphorus in V-N alloy was determined by beryllium salt coprecipitation—molybdenumblue spectrophotometry.
采用铍盐共沉淀—钼蓝分光光度法对钒氮合金中微量磷进行测定。
6) beryllium copper
铍铜
1.
The paper introduced the grade,chemical composition and classification of beryllium copper alloy at home and abroad,as well as the performance and usage of cast beryllium copper and processed beryllium copper,with emphasis on the discussion of relationship between heat treatment process and properties of beryllium copper alloy,as well as the heat treatment equipment.
介绍了国内外铍铜合金牌号、化学成分及分类,介绍了铸造铍铜和加工铍铜的性能和用途。
2.
The alloy constitution,property and application in automotive industry of beryllium copper are introduced.
介绍了铍铜的合金成分和性能以及在汽车工业中的应用。
3.
The performance,characteristics of heat treatment process and the research progress of beryllium copper alloy were introduced in computer,electronic,automotive,mold and other industry in recent year were summarized.
着重介绍了铍铜合金的性能,热处理工艺特点及研究进展,并综述了近年来铍铜在计算机、电子工业、汽车行业、模具行业等一些领域的应用。
补充资料:铍
铍 beryllium 一种化学元素。化学符号Be,原子序数4,原子量9.012182,属周期系ⅡA族,为碱土金属的成员。1798年法国N.-L.沃克兰在分析矿物绿柱石和祖母绿时发现铍。1828年德国F.维勒和法国A.-A.-B.比西各自用金属钾还原熔融的氯化铍,制得金属铍。由于绿柱石的英文名称是beryl ,因此维勒命名为beryllium 。铍在地壳中的含量为0.001%,矿物主要有绿柱石(3BeO·Al2O3·6SiO2)、硅铍石(2BeO·SiO2)和铝铍石(BeO·Al2O3)。 铍是铁灰色金属,熔点1283℃,沸点2970℃ ,相对密度1.85(20℃)。铍的化学性质活泼,但比同族的钙、锶和钡差,暴露在空气中,表面形成一层氧化物保护膜。铍与冷水作用缓慢,因在表面上形成一层难溶解的氢氧化铍,阻止金属进一步与水作用。铍与热的水蒸气作用,生成相应的氧化物。铍既能与水作用,也能与强碱反应,因此铍和氢氧化铍都是两性的。铍的最外电子层有两个价电子,氧化态为+2,只形成+2价化合物。铍的氧化物和卤化物具有明显的共价性,氧化铍和氢氧化铍的溶解度小,氟化铍和氯化铍溶于水。铍的化合物在水中还易发生水解反应。铍的化合物有较强的毒性,吸入人体后,能引起急性呼吸道损害,皮肤与可溶性铍盐接触后,能引起皮炎。金属铍的生产方法有:①金属热还原法。用金属镁还原氟化铍,制取金属铍。②电解法,将熔融的氯化铍和氯化钠的混合物电解,制得金属铍。X射线对铍有很高的穿透能力,铍可用作X射线管的窗口。铍被a 粒子 、氘核和γ射线撞击或照射时 ,能产生中子,因此铍是中子源材料,还可做反应堆的中子减速剂。金属铍的弹性模量与密度之比在金属中最高,而且比强度和微屈服强度也高,在航空航天工业中,用于制造飞行器零件。铍还用于惯性导航系统陀螺仪的制造。 |
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