Hot Tin Essay

Better Essays
The above graph shows temperature of Sn0.3Ag0.7Cux In alloy as a function of indi-um weight percentage. Initially with no traces of Indium, the solidus temperature & liquidus temperature are 219.40̊C and 241.70̊C. It clearly shows that the temperature range goes wider as the concentration of indium is increased [6]. This is not a cost effective solution as indium is very costly.
Titanium oxide nano particles addition led to temperature changing from 217 to 217.64 degree Celsius [7]. Zinc oxide bearing SAC had temperature of about 222.16
High Temperature Electronics
6
degree celsius when zinc was about 0.5% by weight [8]. From this it can be conclud-ed that there no major effect on melting temperature.
2.2.2 Wettability
It is the ability of
…show more content…
They can grow upto several microns and have excellent electrical conductivity. Their growth can be re-tarded by adding 0.5% Zn, using reflowed tin or hot tin dip. Reflowed tin is a tech-nique that involves reheating a part above the melting temperature of tin after it has been electroplated with tin. Hot tin Dip is a process in which a part is dipped into a bath of molten tin above 450 F. This creates a thin layer at the interface of the base material & tin.
3.2 Voids
The voids can be removed by adding sintered silver foil that is already coated with chromium and gold. On reaction a uniform layer is formed between Ag/Sn & Sn/Au.
3.3 Reduction in Melting Point
Further reduction in melting point can be made by adding more of the rare earth ele-ments into Sn-Ag-Cu solder.
3.4 Calculation of melting Temperature
(Given)
High Temperature Electronics
10
3.5 State of the Art
The trend is shifting towards lead free solders with different base materials hypo eu-tectic Bi-Ag alloys are preferred based on liquidus temperature in comparison to PbSn solders. Zn-Al eutectic systems alloyed with Mg, Ge ,Ga ,Sn, Sb, Bi may serve interesting topics for
…show more content…
Kanlayasiri, M. Mongkolwongrojn, and T. Ariga, “Influence of indium addition on characteristics of Sn-0.3Ag-0.7Cu solder alloy,” Journal of Alloys & Compounds, vol. 485, no. 1-2, pp. 225–230, 2009.
[7] L.W. Lin, J.M. Song, Y. S. Lai, Y. T. Chiu,N.C.Lee, and J. Y. Uan, “Alloying modification of Sn-Ag-Cu solders by manganese and titanium,” Microelectronics Reliability, Vol.49,no.3, pp235-241,2009.
[8] A. Fawzy, S. A. Fayek, M. Sobhy, E. Nassr, M. M. Mousa, and G. Saad, “Tensil -Creep characteristics of Sn−3.5Ag−0.5Cu(SAC355) solder reinforced with nano-metric ZnO Particles”, Materials Science and Engineering A, vol. 603, pp. 1-10, 2014.
High Temperature Electronics
12
[9] C. M. T. Law, C. M. L. Wu, D. Q. Yu, L. Wang, and J. K. L. Lai, “Microstructure, Solderability & growth of intermetallic compounds of Sn-Ag-Cu-RE lead-free solder alloys”, Journal of Electronic Materials, vol. 35, no. 1, pp. 89–93, 2006.
[10] L. Zhang, X. Y. Fan, Y. H. Guo, and C. W. He, “Properties enhancement of SnAgCu solders containing rare earth element Yb”, Materials & Design, Vol. 57, pp. 646–651, 2014.
[11] L. C. Tsao, S. Y. Chang, C. I. Lee, W. H. Sun, and C. H. Huang, “Effects of nano Al2O3 additions on microstructure development and hardness of Sn3.5Ag0.5Cu solder,” Materials and Design, vol. 31, no. 10, pp. 4831–4835, 2010.

Related Documents

  • Decent Essays

    React. Inorganic, Met. Nano-Metal Chem. 42, 1369–1374 (2012) 9. Shon YS, Cutler E (2004) Aqueous synthesis of alkane thiolatedprotected Ag nanoparticles using Bunte salts.…

    • 899 Words
    • 4 Pages
    Decent Essays
  • Decent Essays

    Si3n4 Synthesis

    • 806 Words
    • 4 Pages

    As a result, a variety of synthesis methods have been attempted to prepare Si3N4 1D nanostructures with various morphologies.10–16 Yang et al. synthesized Si3N4 nanobelts by the catalyst-assisted (e. g., FeCl2, NiCl2, and Al powder) pyrolysis of polysilazane.12,15,17 Huo et al. reported the direct nitridation of Fe–Si alloy particles.14 Shuyue et al.18 and Juntong et al.19 used catalytic thermal-CVD method. Yin et al. reported the vapor–solid reaction of NH3 with SiO.20 Zhang et al.21 and Wang et al.13 prepared Si3N4 nanowires through the reaction of silica gel and carbon nanoparticles.…

    • 806 Words
    • 4 Pages
    Decent Essays
  • Decent Essays

    Schiff Base Brigand Essay

    • 1130 Words
    • 5 Pages

    Baker, Thermo. Chimica Acta 414 (2004) 105113. [37] A. Majumder, G. M. Rosair, A. Mallick, N. Chattopadhyay, S. Mitra, Polyhedron 25 (2006) 1753. [38] M.R. Awual, Chemical Engineering Journal, 279 (2015) 639647.…

    • 1130 Words
    • 5 Pages
    Decent Essays
  • Decent Essays

    XRD patterns of Al-Gr powders Fig. 3. XRD patterns Al-Gr composite This is also in good agreement with endothermic peak at 252.5 ◦C observed in DSC of figure 2 and shown in SEM micrographs of Figure 4. The Presence of SiC as indicated in the XRD pattern confirms the feasibility of the in-situ reaction of silicon and carbon. The initiation temperature of this endothermic reaction with conventional micron sized SiC powder is usually carried out at relatively high temperature (500 ◦C or 600◦C) [22, 23].…

    • 1788 Words
    • 8 Pages
    Decent Essays
  • Decent Essays

    Castor Biodiesel Essay

    • 1981 Words
    • 8 Pages

    [3] A.K. Agarwal, B. Jayashree and L.M. Das, Wear assessment in biodiesel fuelled compression ignition engine, Journal of Engineering for Gas Turbines & Power (ASME Transactions) 125(3), 2003, 820–6. [4] A.K. Agarwal and L.M.…

    • 1981 Words
    • 8 Pages
    Decent Essays
  • Decent Essays

    Chemistry of Materials9: 863-870. Kwon, S. J., E. J. Jeong, Y. C. Yoo, C. Cai, G.- H. Yang, J. C. Lee, J. S. Dordick, R. J. Linhardt, and K. B. Lee (2014). High sensitivity detection of active Botulinum Neurotoxin by glyco-quantitative polymerase chain-reaction. Analytical Chemistry86: 2279-2284. Ladd, J., A. D. Taylor, J. Homola and S. Jing (2008).…

    • 1333 Words
    • 6 Pages
    Decent Essays
  • Decent Essays

    For chlorinated nano-silica, the presence of chlorine was reflected by the presence of stretching vibration at 900 cm-1 and after addition of folic acid the presence of new peaks at 1750 cm-1 was reflected the presence of new carbonyl group of carboxylic group. 3.1.3. Scan electron microscope (SEM) The morphology and size of the raw and modified silica were studied by SEM. (Fig. 2) a shows SEM of the nano-silica, it can be concluded that the modified silica is comprised of aggregated nanoparticles with average size less than 100…

    • 1649 Words
    • 7 Pages
    Decent Essays
  • Decent Essays

    Oligoetherol Synthesis

    • 3560 Words
    • 15 Pages

    Zhang XJ, Tian YP, Li SL, Jiang M, Usman A, Chantrapromma S. Fun HK (2003) Zn(II) and Cd(II) N-carbazolylacetates with strong fluorescences. Polyhedron 22; 397-402. Doi: http://dx.doi.org/10.1016/S0277-5387(02)01360-8 15. Tirapattur S, Belletete M, Drolet N, Leclerc N, Durocher G (200) Steady-State and Time-Resolved Studies of 2,7- Carbazole-Based Conjugated Polymers in Solution and as Thin Films: Determination of Their Solid State Fluorescence Quantum Efficiencies. Chem Phys Letters 370;799-804.…

    • 3560 Words
    • 15 Pages
    Decent Essays
  • Decent Essays

    The size and shape of the nano-particles can be controlled by adjusting the pH level, ionic strength, temperature, or the Fe(II|)/Fe(II) ratio. Since early 1990s, the iron corrosion chemistry has been put into productive use when treating toxic chemicals. The environmental chemistry of metallic or zero valent iron has been extensively documented. Contaminants such as as tetrachloroethene (C2 Cl4), can readily accept the electrons from iron oxidation and be reduced to ethene gas in accordance with the following stoichiometry (EPA, 2003): C2Cl4 +4Fe +4H →C2H4 +4Fe +4Cl Research has found that although iron nano-particles remediate contaminants well, they tend to form a mass group in soil or water. In response, carbon nano-particles and water-soluble polyelectrolytes are used to support iron nano-particles.…

    • 1110 Words
    • 5 Pages
    Decent Essays
  • Decent Essays

    Leukocyte Gcrete Lab Report

    • 2582 Words
    • 11 Pages

    Uchiyama, T., Miyazaki, K., and Yaoi, K. (2013) Characterization of a novel β-glucosidase from a compost microbial metagenome with strong transglycosylation activity. J. Biol. Chem., 288 (25),…

    • 2582 Words
    • 11 Pages
    Decent Essays