Sn-Zn系无铅钎焊料的发展现状与展望

阐述了无铅焊料的发展过程,对Sn-Zn系无铅焊料发展现状及研究进行了介绍.详细分析了一些合金元素添加后对Sn-Zn系钎焊料的影响,同时叙述了对Sn-Zn焊料与Cu、Al、Ni材质基板之间的界面反应研究,并对Sn-Zn系钎焊料的研究及商业化应用进行了论述和展望.     

无铅焊料在电子产品中的应用特性和问题综述

概述了无铅焊料的基本技术要求，对目前几种典型无铅焊以及无铅焊料在电子工业中应用特点和应注意的问题进行了分析。     

Sn—Ag基无铅焊料的研究与进展

研究开发无铅焊料是我国电子材料行业面临的新课题,Sn-Ag系是一种有希望替代铅焊料的无铅焊料。本文综述了该合金系研究的主要成果,包括微观组织、焊料与基体的相互作用、拉伸和剪切性能、疲劳性能及蠕变性能,指出了此合金系作为软钎焊材料尚待解决的问题。采用合金化、基体涂层、发展新焊剂等手段可使该合金系发展为较理想的无铅焊料。     

无铅焊料的研究现状

对无铅焊料的发展、种类、物理和力学性能进行了综述分析，评价了目前常用的几种无铅焊料系列在电子产品封装使用中的优缺点，出现问题的一些解决办法，适用的焊接工艺。指出了当前无铅焊料急需解决的关键问题和未来无铅焊料的发展趋势。     

无铅焊料研究进展和若干前沿问题

评述了国外无铅焊料研究的现状和前景，比较了几种有潜力的无铅焊料的性能，指出了无铅焊料研究的几个前沿问题。     

高性价比的Sn-0．3Ag-0．7Cu-A无铅焊料

开发了一种新型Sn-0．3Ag-0．7Cu-A无铅焊料，进行了拉伸实验、润湿性测试、差热分析和相对成本计算，并与目前通用的Sn-0．7Cu和Sn-3．0Ag-0．5Cu无铅焊料进行了对比。结果表明：该焊料不仅物理、力学性能优异，而且成本极低，可以显著降低电子组装和封装行业的生产成本，极大地提高产品的市场竞争力。     

电子工业用无铅焊料

铅在环境和人类健康方面的有害影响以及其立法的威胁，促使人们对无铅焊料在电子工业上的应用进行了一系列的研究，目前，Ｓｎ－Ｐｂ共晶和其他含铅焊料在印刷电路板的装配上已虱到了广泛的应用，一些无铅焊料在电子装配生产中所显示出的代替Ｓｎ－Ｐｂ焊料的可能怀正在日益受到人们的关注，近来，无铅焊料的润湿性，抗拉和抗剪切强度以及其蠕变性和低循环疲劳强度方面的很多研究已有详细的报导。本文的目的在于评述这些结果并从工艺     

无铅焊料的发展概况

随着环保意识的增强，人们加紧了对无铅焊料的研究。文章概述了无铅焊料的研究现状及发展趋势，对近20年来部分无铅焊料的研究成果进行了述评，探讨了无铅焊接研究中急需解决的几个问题。     

Sn-Bi-In合金焊料及相图计算基础

Sn-Pb软钎焊料由于润湿性好、性能优良,是电子封装领域主要运用的传统软钎焊材。Pb有毒不符合绿色发展的理念,减少Pb的使用能保护环境和人体健康,必须研发新型无铅焊料替代传统的Sn-Pb焊料。新型的低温软钎焊料包括Sn-Bi, Sn-In两系合金。本文总结了Sn-Pb焊料的优点和缺点,与Sn-Pb焊料相比较阐述了Sn-Bi, Sn-In系低温无铅焊料的性能。分析了In, Bi的相互作用对锡基无铅焊料组织及性能的影响。低温的Sn-Bi-In系合金绿色无污染,将是一种能够运用于消费电子产品的新型无铅焊料合金。通过相图计算可以筛选较优的合金成分,为Sn-Bi-In无铅焊料的设计和性能研究提供参考,因此Sn-Bi-In三元系相图的计算尤为重要。文章中论述了Sn-Bi-In系合金的相图计算研究现状及热力学模型,收集整理了一些Sn-Bi-In三元合金的相结构参数和热力学数据,同时结合了CALPHAD说明了将相图计算运用于新型Sn-Bi-In焊料开发的优势。     

无铅焊锡的应用与开发

随着环保和生活质量要求不断提高 ,国外对含铅焊料的使用限制愈来愈严格 ,而无铅焊料的使用愈来愈多。作为锡和焊锡生产和出口大国 ,研究和开发无铅焊料已成必然 ,本文就目前有可能替代传统含铅焊料的无铅焊料作一些介绍     

Chinalco Signed Framework Agreement for Strategic Cooperation with Harbin Municipal Government

正Last month,Chinalco signed framework agreement for strategic cooperation with Harbin Municipal Government in Harbin Xiong Weiping,Chairman of Chinalco,said that based on the strategic deployment to build world top-class mining company with the highest growth potential,Chinalco was now concentrating all efforts on making strategic transition and structural adjustment,strategic cooperation with the local governments where     

Jiangxi Promotes Jiangxi Copper Corporation To Become The World's Most Competitive Mining Company

<正>According to the latest info from Jiangxi Province State-owned Assets Supervision and Administration Commission,Jiangxi Copper Corporation was approved to become the first pilot enterprise for deepening reform.Contents of the pilot work is"Three Self"(self expansion,self decision-making,self     

Journal of Rare Earths Contents List of Vol.32(2014)

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Contributions to Baosteel Technical Research wanted

正Baosteel Technical Research,a quarterly journal,which is issued domestically and abroad,is run and sponsored by Baosteel Group Corporation.Baosteel Technical Research mainly reports the achievements in technological innovation,academic research,new product development and industrial equipment improvement by Baosteel.It will continue to follow up on hot topics and serve the company’s technological development and progress.Its readers include experts in     

Ministry of Industry and Information Technology: No Short Term Solution For Our Country’s Excess Nonferrous Metal Smelting Capacity

【正】According to the Ministry of Industry and Information Technology,the Ministry has released the 2013 Operation Report on China’s Industrial Communication Indu...     

Chinalco Signed Framework Agreement for Strategic Cooperation with Gansu Province

正Recently,Chinalco and Gansu Provincial People’s Government signed"Framework Agreement for Strategic Cooperation on Reform,Restructuring and Transition Development of Chinalco’s Electrolytic Aluminum Enterprises in Gansu",signifying that the strategic cooperation between Chinalco and Gansu Province had made new substantive progress.     

Unavoidable Economic Cycle:30% Of Nonferrous Metal Companies Were Involved In Restructuring

正Owing to continual downturn in real estate and bulk commodity markets,a number of traditional industries in China suffered unfavorable impact in performance.With the progressive disclosure of third quarter report,the no-pleasant-surprise performance of     

Baotou Rare Earth Became the World's Biggest High Performance Magnetic Material Base

正The High Performance Magnetic Material Phase II Project,an industry upgrading project implemented by Inner Mongolia Baotou IronSteel Rare Earth(Group)Hi-tech Co.,Ltd,recently basically finished equipment commissioning,signifying that the enterprise had developed the production capacity of15000 t/a Nd-Fe-B strip casting alloy and 5000t/a Nd-Fe-B magnet,thus becoming the world’s     

Introducing Two Central Enterprises to Integrate Rare Earth Industry,Shandong Rare Earth Group Breaks Surface

正With the signing of"Letter of intention for Propelling Integration of Shandong Rare Earth Enterprises"between Shandong Province Commission Of Economy and Informatization,China IronSteel Research Institute Group("China Steel Institute"),and China Rare MetalsRare Earth Co.,Ltd("China Rare Earth"),the"Shandong Rare Earth Group"jointly set up by the 3 units thus broke surface.On August 9,reporters of the China Economic Herald learned from Shandong Province     

Aluminium Production by Province or City in 2014

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