查询词典 alkaline metal

The dynamical process of spectral hole burning of Sm〓 doped in alkaline earth metal fluorine halide mixed crystals was studied.

对Sm〓掺杂碱土金属氟卤化物的光谱烧孔的动力学过程进行了讨论。

Different alkaline earth metal ions, such as Ca(superscript 2+), Mg(superscript 2+) and Zn(subscript 2+), were introduced and their influences on the working characteristics, crystalline behavior as well as the electrical properties were studied.

通过引入Ca(上标 2+)，Mg(上标 2+)，Zn(上标 2+)等不同的二价金属离子，重点讨论了它们对玻璃的特征温度、分相析晶行为以及膨胀系数、电学性质的影响。

The mechanism of thermal decomposition for alkaline earth metal benzoate s was studied by using TG,DTA,IR and gas chromatography_mass spectrometer.

用DTA和TG研究了碱土金属苯甲酸盐在氮气气氛中的热分解过程，并用红外光谱、色-质联用表征了热分解产物。

The complexation properties of them with alkali and alkaline earth metal ions have been investigated by means of visible spectra in solns.

方法简便，产率较高，借助于可见光谱测定，考查了它们在溶液中与碱金属和碱士金属盐等的配位性能。

By means of static and dynamic experiments, lots of research on the effect of micro-quantity heavy metal ions removal by weakly basic anion exchange resins from drinking water with alkali metals, alkaline-earth metals and anions at high concentration, has been done.

本文采用静态和动态两种试验方法，对弱碱性阴离子交换树脂在碱金属、碱土金属离子以及阴离子相对较高浓度的背景下去除饮用水中微量重金属离子（以Hg2+为研究处理对象）的效果进行了大量试验研究。

A series of perovskite oxides are synthesized by means of blend deposition using the nitrate of A and B as the raw materials, and ammonia or sodium carbonateas sedimentation .A includes alkaline-earth metals such as Mg, Ca, Sr, Ba and rare-earth metalsLa; while B includes transition metal Cr, Mn, Fe, Co and Ni.

本文以A，B的硝酸盐为原料，以氨水或碳酸钠为沉淀剂，利用混合沉淀的方法合成了系列钙钛矿型氧化物。A选碱土金属元素Mg、Ca、Sr、Ba等及稀土金属元素La；B选过渡金属元素Cr、Mn、Fe、Co、Ni等。

Butt Weld and docking and corner combinations Weld, in Weld ends located arc plate and extraction plate in igniting board then leads to the welding seam, joint halfway shall weld joints in front of 2.0 mm Department Firing arc, welding pieces after preheating rod will return to weld the origin, pool filled to the required thickness, before forward welding; Welding speed : Isokinetic welding requirements to ensure weld thickness, width uniform, which masks to look for hot metal and slag bath equidistance (2-3 mm)%; Arc welding rod length : different models and determined that the general requirements of arc length is stable, acid electrode generally 3-4 mm, 2-3 mm normally alkaline electrode%; Welding perspective : According to determine the thickness of two pieces of welding, welding angle has two aspects : First, the angle between the direction of the rod and welding of 60-75 ; The second is the angle between two electrodes and welding around, the same thickness as welding, welding and welding pieces incident angle of 45 ; When the thickness ranging from welding, welding electrode and thick and thin pieces of welding electrode side angle greater than the angle between the side pieces; Arc : admission to the end of each weld should be filled crater, in the direction opposite to the direction of the back-arc welding, arc welding unchanged inside pit in 1974, to prevent the crater bite of meat.

对接焊缝及对接和角接组合焊缝，在焊缝两端设引弧板和引出板，必须在引弧板上引出后再焊到焊缝区，中途接头则应在焊缝接头前方15～20㎜处打火引弧，将焊件预热后再将焊条退回到焊缝起始处，把熔池填满到要求的厚度后，方可向前施焊；焊接速度：要求等速焊接，保证焊缝厚度、宽度均匀一致，从面罩内看熔池中铁水与熔渣保持等距离（2～3㎜）为宜；焊接电弧长度：根据焊条型号不同而确定，一般要求电弧长度稳定不变，酸性焊条一般为3～4㎜，碱性焊条一般为2～3㎜为宜；焊接角度：根据两焊件的厚度确定，焊接角度有两个方面，一是焊条与焊接前进方向的夹角为60～75 ；二是焊条与焊接左右夹角有两种情况，当焊件厚度相等时，焊件与焊件夹角为45 ；当焊件厚度不等时，焊条与较厚焊件一侧夹角应大于焊条与薄焊件一侧夹角；收弧：每条焊缝焊到末尾，应将弧坑填满后，往焊接方向相反的方向带弧，使弧坑甩在焊道貌岸然里边，以防弧坑咬肉。

Existing lithium-ion battery nickel-metal hydride batteries (side, round, button-shaped) and a button battery (alkaline manganese, zinc silver and lithium manganese).

现有锂离子电池镍氢电池及一次纽扣电池。

A process of alkaline hard chromium plating on aluminum alloy was presented,including oil removal,dipping in heavy metal solution,acid pickling,dipping in zinc solution,hard chromium plating.

1前言铝合金电镀硬铬，是利用强碱性的锌酸盐溶液在置换锌层上直接镀铬，其工艺成熟，操作简便、易行。

A process of alkaline hard chromium plating on aluminum alloy was presented, including oil removal, dipping in heavy metal solution, acid pickling, dipping in zinc solution, hard chromium plating.

提出了一种铝合金碱性直接镀硬铬工艺，包括除油、重金属、侵蚀、锌、硬铬。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。