查询词典 SN

Series of Bi-Pb-Sn-Cd fusible alloys were designed with reference to the characteristics of Bi-based alloy and their phase diagram.

Bi Pb Sn Cd易熔合金的熔点低、熔化范围窄，且具有良好的钎焊性能，常用于制作电器、消防、火灾报警等装置中的感温和热敏元件[1]。

Investigation was made of the sputtering rate in glow discharge lamp with re-lation to constituent of 25 different specimens of 6 binary systems, namely, Cr-Fe, Bi-Sb,Cu-Zn, Ag-Cu, Al-Zn and Cd-Sn, by measuring mass loss after each sputtering under con-stant Ar pressure and voltage applied. The correlation, in general, between sputtering rate andconcentration of constituent of these non-intermetallic binary alloys obeys the hyperbolic lawunder steady state, yet may be approximately regarded as linear only on certain special condi-tion if the two components of the alloys with similar sputtering rates.

在恒定气压和电压条件下，用测量溅射减量的方法，系统研究了Cr—Fe，Bi-Sb，Cu—Zn，Ag—Cu，Al-Zn和Cd—Sn六个系统的25个试样在辉光放电灯中溅射率与组分的关系结果表明；阴极溅射在稳态时，二元合金的溅射率与组元浓度的普遍关系是双曲线，只有在某些特殊情况下，两组元的溅射率相差不大时，可以近似看成线性关系。

Element contents such as Au, Zn, Sb, Cd, Sn, As, and Hg in Proterozoic strata in the southern Jilin province show obviously higher. Au, Ag, W, Bi, Sb, and As in the Baishan gold deposit have high concentration and heteromorphosis coefficient with character of multiple element overlying anomaly.

吉南元古庙分布区Au、Zn、Sb、Cd、Sn、As、Hg等元素丰度具有显著偏高特征，白山金矿区Au、Ag、W、Bi、Sb、As等元素具有浓集系数高、变异系数大、多元素套合叠加异常等特点。

A new cermet sinter with through micro-porous structure was developed by vacuum liquid phase sintering method, in which Al2O3-Ni-Cr-Mo-Si-Fe powder was used as the basic material, TiH2 and CaCO3 were used as the composite pore-forming materials and hominess grains was used as dispersal particles. The cermet sinter was then infiltrated with Ag-Cu-Pb-Sn at vacuum and formed a new high temperature self-lubricating material.

以TiH2和CaCO3为复合造孔剂，以硬质微细颗粒为惰性弥散质点，采用真空烧结法制备出具有贯通型微孔结构的Al2O3-Ni-Cr-Mo-Si-Fe系金属陶瓷烧结体，并在烧结体中浸渍Ag-Cu-Pb-Sn系浸渍型固体润滑剂制备出新型高温扩散自润滑材料。

It follows that Sn has the homotopy type of a finite cellcomplex.

据此可知，Sn具有一个有限胞复形的同伦型。

Effects of aging on interfacial reaction and joint strength of Sn-Zn-Bi-Nd/Cu were investigated.

研究了时效对Sn-Zn-Bi-Nd/Cu接头的界面反应和力学性能的影响。

Surface of Sn coating. At the same time, the formation of intermetallic compound at the

异，从而导致了在温度循环条件下发生SnO2与Sn的热失配，进而在其界面处产生了极大的

The decomposition of ammonium jarosite bearing indium in NaOH medium were studied. The effects of NaOH addition, liquid-solid ratio, decomposition temperature and time on the decomposition ratio of ammonium jarosite were investigated, respectively, and the behavior of impurity elements, such as Zn, In, Cu, Cd, Pb, As, Sb, Sn and Ag in jarosite residues was also discussed.

摘 要：提出NaOH分解含铟铁矾渣新工艺，考察NaOH用量、液固比、温度和时间对铁矾渣分解率的影响，并讨论铁矾渣中杂质金属，如Zn、In、Cu、Cd、Pb、As、Sb、Sn和Ag等在NaOH分解过程中的行为。

The results show that the decomposition rate of ammonium jarosite can reach 98.03% under the following optimum conditions, which are m m=0.381 41, temperature 60 ℃, liquid-solid ratio 21, reaction time 2 h. During the alkaline decomposition, the impurity elements, such as Zn, In, Cu, Cd, Pb, Sb, Sn and Ag are left in the residue, while As is leached into the pregnant solution as AsO43 with leaching rate of 83.36%.

结果表明：在 m m=0.381 41、温度60 ℃、液固比21、反应时间2 h的最优条件下，铁矾渣的分解率达到98.03%，而原料中的杂质金属，如Sn、Sb、Zn、In、Cu、Cd、Pb和Ag等绝大部分留在分解渣中，As则以AsO43的形态大部分进入溶液，浸出率达到83.36%。

Full-automatic continuous selectivity electroplating line Ni + Au + Sn (bright/ fog/ SnPb (bright/ fog)+ SnCu; Roll a gold plating , roll the silver plating line , roll the copper facing , nickel , tin (bright/ fog), tin lead (bright/ fog) line; The bundle of silver plating , tin , tin lead line, are concerned about the nickel plating line waiting.

生产设备：Production facility：全自动连续选择性电镀线（Ni+Au+Sn/SnPb+SnCu）；滚镀金，滚镀银线，滚镀铜，镍，锡，锡铅线；挂镀银，锡，锡铅线，挂镀镍线等。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失