Al－TiB_2自生复合材料的燃烧合成研究

研究了Ａｌ－ＴｉＢ＿２体系的燃烧合成过程。用粉末（Ａｌ、Ｔｉ、Ｂ）通过燃烧方法制备（Ａｌ－ＴｉＢ＿２）自生复合材料，采用ＤＴＡ、ＸＲＤ和ＳＥＭ技术对复合材料的形成和结果进行分析研究。得到如下结果：分别用８０％Ａｌ＋２０％（Ｔｉ＋２Ｂ）、９０％Ａｌ＋１０％（Ｔｉ＋２Ｂ）原料粉末，通过燃烧合成可得到Ａｌ－ＴｉＢ＿２，制备过程中产生少量ＴｉＡｌ＿３，Ａｌ基体与ＴｉＢ＿２结合紧密，无明显界面存在。     

Al—TiB2自生复合材料的燃烧合成研究

研究了Ａｌ－ＴｉＢ２体系的燃烧合成过程，用粉末（Ａｌ，Ｔｉ，Ｂ）通过燃烧方法制备（Ａｌ－ＴｉＢ２）自生复合材料，采用ＤＴＡ，ＸＲＤ和ＳＥＭ技术对复合材料的形成和结果进行分析研究，得到如下结果，分别用８０％Ａｌ＋２０％（Ｔｉ＋２Ｂ）９０％Ａｌ＋１０％（Ｔｉ＋２Ｂ）原料粉末，通过燃烧合成可得到Ａｌ－ＴｉＢ２制备过程中产生少量ＴｉＡｌ３，Ａｌ基体与ＴｉＢ２结合紧密，无明显界面存在。     

弱放热反应TiSi2燃烧合成的研究

采用燃烧合成法合成了绝热温度为１８００Ｋ的ＴｉＳｉ２。分析了毛坯直径和初始孔隙率、Ｔｉ颗粒及预热温度对燃烧合成的影响，证实满足Φ＝９２ｍｍ，ρ＝５２％的－３００目钛粉形成的毛坯在常温才能发生自蔓延反应。利用燃烧波前沿熄淬法（ＣＦＱ）研究了ＴｉＳｉ２形成机制。当Ｔ≤１３３０℃时ＴｉＳｉ２通过扩散反应机制进行；当Ｔ〉１３３０℃时，ＴｉＳｉ２反应机制则是溶解－沉淀析出。分别利用ＸＲＤ和ＳＥＭ分别了产物及     

水热合成技术的研究和应用：VI.钛酸钙电子陶瓷晶体粉末的制备研究

采用水热法合成ＣａＴｉＯ３电子陶瓷晶体粉末，以Ｃａ（ＯＨ）２和Ｔｉ（ＯＨ）２为水热合成前驱物，制备前驱物的原料选用Ｃａ（ＮＯ３）２或ＣａＯ及ＴｉＣｌ４水热体系的ＫＯＨ浓度为０．１～１．６ｍｏｌ／Ｌ，水热温度为１５０～２００℃，时间２０～６０ｍｉｎ实验结果表明在各自实验范围均能效合成ＣａＴｉＯ３推荐合成条件为１７５℃，３０ｍｉｎ，水热体系ＫＯＨ浓度０．２ｍｏｌ／Ｌ，文中对合成机理进行初步探讨。     

自蔓延高温合成TiB2粉末

通过对稀释剂加入量、压制压力等反应条件对燃烧波蔓延速率的影响，研究了带还原阶段的ＳＨＳ反应。掌握了用此工艺制备ＴｉＢ＿２粉末。     

水热合成技术的研究和应用：Ⅳ.钛酸锶晶体粉末的制备

本文以Ｓｒ（ＯＨ）２和ＴｉＯ（ＯＨ）２作为水热合成ＳｒＴｉＯ３晶体粉末的前驱物，讨论并选定制备前驱物的化工原料，并对水热合成ＳｒＴｉＯ３晶体粉末的条件：ＫＯＨ浓度、温度和时间进行了考察。结果表明１５０－２００℃，１ｈ均可有效合成。２００℃下水热２０－６０ｍｉｎ产物的Ｘ光衍射征峰高无明显差别；水热介质中ＫＯＨ浓度从０．１－１．０ｍｏｌ／Ｌ区域内对合成无大的影响；最后初步讨论了ＳｒＴｉＯ３晶体粉末的合     

国外简讯

国外简讯高温自蔓延合成／动态密实制备ＴｉＢ２ＳｉＣ美国加州加利福尼亚大学应用机械和工程科学系的研究人员利用Ｔｉ＋２Ｂ的放热反应和高速锻造相结合制备出致密的ＴｉＢ２２０ｖｏｌ％ＳｉＣ。采用９９％高纯钛粒子（粒径为４４μｍ）、结晶硼、９０％纯度的Ｓｉ...     

水热合成技术的研究和应用：V.锆酸锶,锆酸钡晶体粉末的制备研究

采用碱性前驱物Ｂａ（ＯＨ）２或Ｓｒ（ＯＨ）２及两性前驱动ＺｒＯ（ＯＨ）２，水热合成了ＢａＺｒＯ３和ＳｒＺｒＯ３晶体粉末，一系列实验结果表明，在水热温度为１５０～２００℃，ＫＯＨ浓度为０．１～０．８ｍｏｌ／Ｌ，时间２０～６０ｍｉｎ的条件下，均能有效合成。在相同的碱度下，延长水热时间或提高温度有利于ＳｒＺｒＯ３，ＢａＺｒＯ３晶体粉末的合成，晶化，晶体长大和提高晶体完整性，推荐合成条件：在０．２ｍｏｌ／     

冷却速度对Ti3Al-10Nb-3V-1Mo合金组织的影响

用秀射龟镜研究了Ｔｉ３Ａｌ－１０Ｎｂ－３Ｖ－１Ｍｏ合金在１１７０℃加热１ｈ，以不同速度冷却后的显微组织结构。结果表明，Ｗ，Ｑ．组织由单一Ｂ２相组成，Ａ．Ｃ．组织由Ｂ２相基体组成，Ｂ２相晶粒内开始第二相的析出。     

含钡低钛渣冶金性能的研究

对含钡低钛（ＴｉＯ２＜５％）渣的冶金性能进行了实验室研究。试验证实，该渣属短渣类型，由自由流动到失去流动性温度范围只有２０～３０℃；在１５２０℃时粘度小于０．４０ＰａＳ，流动性良好；在二元碱度为１．０５（ＴｉＯ２）为３％时，炉渣粘度最小；溶化性温度为１３６０～１４２０℃，溶化性良好；与一般低钛渣比性能更为稳定，据此提出了酒钢高炉宜采用含钡低钛（ＴｉＯ２为２％～３％）渣冶炼的建议。     

China's Major Non-ferrous Metals Imports & Exports

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Zinc Production by Province in 2014

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80% of Chinese Firms Purchasing Overseas Mines Ended up in the Red

<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic     

Copper Processing Profit Dropped Sharply,Copper Consumption Will Face Impact in the Second Half of the Year

正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field,     

Central Geological Prospecting Fund Newly Added 16.47 Million Tonnes of Bauxite in 2013

正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF     

Manufacturers of Copper Tube for Central Air Conditioner Use Face Mounting Pressure in the Final Quarter of the Year

正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure     

Xinjiang Ranks No.1 in Production of Primary Aluminum in China

正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year,     

Shenhuo Coal Industry and Electricity Power Completed800,000 t/a Aluminum Project in Xinjiang

正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform.     

Guangdong Metal Transaction Center has Become the Second Largest Precious Metal Transaction Platform Nationwide

正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness.     

Seven Rare Earth Projects Involving Close to 3 Billion Yuan Investment Landed In the HighTech Zone

正On May 22,Baotou Rare Earth Industry Cooperation Consultation MeetingProject Agreement-signing Ceremony was held in Ningbo,nearly 40 enterprises from Ningbo,Guangdong,Hunan,and Shanxi participated in project consultation.After multi-lateral communication,agreements were signed for a total of 7 rare earth projects successfully.