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Kα射线作为X光源,分析室真空度约为6.58×10-7 Pa,以表面污染C1s(284.6 eV)为标准进行能量校正. 表1 无铅硅黄铜光谱分析表 Table 1 Spectral analysis of lead-free silicon brass 2 结果与讨论 2.1 铸锭的显微组织 图1所示为不同Zn含量无铅黄铜的XRD谱.由图1可知,当合... of lead-free silicon brass with different Zn contents 图2 不同Zn含量无铅硅黄铜的SEM像 Fig. 2 SEM images of lead-free silicon brass with different Zn contents 2.2 脱锌层厚度 图3所示为不同Zn含量合金脱锌腐蚀后腐蚀横截面的......
in size to small lead-free solder joints used in electronic packaging and jointing) between thin copper strips were fabricated using lead-free solder (Sn-3.5Ag) to quantify their creep strains... The maximum rate of electronic-resistance strain measurement is 3.5×10-3 s-1. Key words: lead-free solder joint; micro resistance; creep strain; electronic-resistance strain 电子封装中,焊点机械性能失效是导致电子产品可靠性降低......
: The lead-free piezoelectric ceramics (K0.5Na0.5)NbO3 (abbreviated as KNN) with the relative density of 97.6% were synthesized by press-less sintering owing to the careful control of processing... KNN ceramics are poling field of 4 kV/mm, poling temperature of 140 ℃ and poling time of 20-25 min. Key words: (K0.5Na0.5)NbO3; lead-free piezoelectric ceramics; piezoelectric properties; poling......
Trans. Nonferrous Met. Soc. China 24(2014) s146-s151 Ferroelectric and piezoelectric properties of SrZrO3-modified Bi0.5Na0.5TiO3 lead-free ceramics Adnan MAQBOOL1, Ali HUSSAIN1, Jamil Ur RAHMAN1...; 2. Korea Electrotechnology Research Institute, Gyeongnam 641-773, Korea Received 18 June 2013; accepted 18 November 2013 Abstract: The lead-free SrZrO3-modified Bi0.5Na0.5TiO3 (BNT-SZ100x, with x......
后钎料内部Ag仍以共晶形式存在,时效后Ag3Sn颗粒沿钎料内部的共晶组织网络析出. 关键词:Sn-Ag-Cu无铅钎料；La；钎焊；时效；金属间化合物 中图分类号:TG 425.1 文献标识码:A Effect of La on intermetallic compounds of Sn-Ag-Cu lead-free... 410083, China) Abstract: The effects of minor La on the formation and growth behaviors of intermetallic compounds at Sn-3.0Ag-0.5Cu lead-free solder alloy/copper substrate interface and inside......
;文章编号:1672-7207(2009)01-0200-05 Effect of B-site complex ions substitution on dielectric properties of Na1/2Bi1/2TiO3 lead-free piezoelectric ceramics ZHOU Chang-rong1, 2, LIU Xin-yu1, 2 ... University, Changsha 410083, China) Abstract: A new lead-free piezoelectric ceramics of (1-x)Na1/2Bi1/2TiO3-xNa1/2Bi1/2(Sb1/2Nb1/2)O3 was prepared by conventional solid state reaction and the effects of B......
℃. Key words: lead-free solder; Sn-Ag-Cu-Ce alloy; wetting time; solidus; liquidus CLC number: TG146.1 Document code: A 1 INTRODUCTION With approaching the deadline (July 1, 2006) of WEEE and RoHS, many investigations and applications about new lead-free solders......
accelerates the crystallization and growing up of IMC. Key words: lead-free solder; Sn-Ag-Cu alloy; IMC thickness; uniform design ... to environmental concerns over lead containing solders, the electronic industry has been actively searching for lead free solders for nearly two decades. The European legislation has become effective on July 1......
of K0.5Na0.5NbO3-LiSbO3-BiMnO3 lead-free ceramics CHENG Jun1, JIANG Min-hong1, 2, LIU Xin-yu1, 2 (1. Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, China; 2. School of Materials Science and Engineering, Central South University, Changsha 410083, China) Abstract: Lead-free 0.2% (mole fraction) BiMnO3 (BM)-doped 0.95 K0.5Na0.5NbO3 (KNN......
Trans. Nonferrous Met. Soc. China 28(2018) 1166-1175 Property alterations of Sn-0.6Cu-0.05Ni-Ge lead-free solder by Ag, Bi, In and Sb addition Kannachai KANLAYASIRI, Rachata KONGCHAYASUKAWAT... properties of the Sn-0.6Cu-0.05Ni-Ge (SCNG) lead-free solder and the interfacial reaction with the Cu substrate. The melting behavior, microstructure, tensile strength, and wettability of the SCNG-x (x......
