ZrO2-SiO2膜的制备和结构研究

以正硅酸乙酯和氧氯化锆为原料,用溶胶－数胶法制备了无支撑ＺｒＯ２－ＳｉＯ２膜。应用ＤＴＡ－ＴＧ、ＸＲＤ－ＳＥＭ和ＢＥＴ等测试技术对无支撑ＺｒＯ２－ＳｉＯ２膜结构、表面形貌和孔径进行了表征,结果ＺｒＯ２－ＳｉＯ２凝胶膜虽在４６７℃开始出现少量单斜ＺｒＯ２,但在５００℃和１２００℃热处理后的晶相均为四方ＺｒＯ２显然ＳｉＯ２的存在的ＺｒＯ２－ＳｉＯ２膜具有比ＺｒＯ２膜同的热稳定性,在９５０℃欧下发人头发     

K_2O－B_2O_3－SiO_2玻璃成分对析晶性能的影响

本文利用ＤＴＡ、ＸＲＤ、ＴＥＭ、ＳＥＭ等技术研究了三种Ｋ２Ｏ－Ｂ２Ｏ３－ＳｉＯ２玻璃的析晶性能。结果表明，Ｋ２Ｏ－Ｂ２Ｏ３－ＳｉＯ２玻璃的析晶由分相引起，分相和析晶能力受成分影响较大。随Ｂ２Ｏ３和Ｋ２Ｏ含量增多及Ｋ２Ｏ／Ｂ２Ｏ３比值的降低，析晶加强。析晶中主晶相类别尚未查清，次晶相确定为α－方石英。     

K2O—B2O3—SiO2玻璃成分对析晶性能的影响

本文利用ＤＴＡ、ＸＲＤ、ＴＥＭ、ＳＥＭ等技术研究了三种Ｋ２Ｏ－Ｂ２Ｏ３－ＳｉＯ２玻璃的析晶性能。结果表明，Ｋ２Ｏ３－Ｂ２Ｏ３－ＳｉＯ２玻璃的析晶由分相引起，分相和析昌能力受成分影响较大，随Ｂ２Ｏ３和Ｋ２Ｏ含量增多及Ｋ２Ｏ／Ｂ２Ｏ３比值的降低，析晶加强，析晶主晶相类别尚未查清，次晶相确定为α－方石英。     

溶胶－凝胶法制备Pb（Zr，Ti）O_3玻璃陶瓷过程中的结构变化

本文介绍溶胶－凝胶法制备均匀ＰｂＺｒ－Ｔｉ－Ｂ－Ｓｉ凝胶玻璃，并通过适当热处理在凝胶玻璃中原位生长Ｐｂ（Ｚｒ；Ｔｉ）Ｏ３微晶的新工艺·利用ＩＲ谱考察了凝胶玻璃中的元素键合结构随温度的变化．结合热分析和ＸＲＤ；ＳＥＭ技术，研究了Ｐｂ（Ｚｒ，Ｔｉ）Ｏ３微晶在凝胶玻璃中的生长过程及该材料的结构特点．发现Ｐｂ２（Ｚｒ，Ｔｉ）２Ｏ６＋ｘ立方焦绿石介稳过渡相的纳米微晶首先出现于该体系中，并在更高的温度下先后完全转变成三方和四方Ｐｂ（Ｚｒ，Ｔｉ）Ｏ３钙钛矿相．电子显微观察结果表明，该工艺制备的Ｐｈ（Ｚｒ；Ｔｉ）Ｏ３玻璃陶瓷具有均匀的细晶结构．     

BaTiO3凝胶玻璃的析晶与晶格能分析

采用溶胶凝胶法制备了ＢａＴｉＯ３凝胶玻璃,并利用ＤＴＡ和ＸＲＤ分析对其析晶过程进行了分析。结果表明铝硅酸盐凝胶玻璃和硼硅酸盐凝胶玻璃在玻璃中含量为１０ｍｏｌ％￣３０ｍｏｌ％,析出的主晶相为ＢａＴｉＯ３;但在下班中含量为５０ｍｏｌ％以上时,析出的主晶相变为Ｂａ２ＴｉＳｉ２Ｏ８。利用晶格能对ＢａＴｉＯ３凝胶玻璃的析晶次序进行了分析,其与实验结论相一致。     

α－Al_2O_3与CaO－Al_2O_3－B_2O_3系玻璃复合材料的等速升温

用ＤＴＡ、ＸＲＤ及压汞方法研究了α－Ａｌ２Ｏ３与ＣａＯ－Ａｌ２Ｏ３－ＳｉＯ２－Ｂ２Ｏ３系玻璃复合材料的等速升温烧结与相组成．实验表明：在７０－９００℃时烧结快速进行．９００℃后由于闭气孔大量生成使致密化速度减慢．钙长石是由玻璃析晶及α－Ａｌ２Ｏ３与玻璃在＞７００℃反应生成．     

YSZ超细粉末的溶胶——凝胶法制备

应用溶胶－凝胶方法合成了ＹＳＺ（Ｚｒ０２＋９ｍｏｌ％Ｙ２Ｏ３）超细粉末。对凝胶形成超细粉末的热分解及晶化过程用ｘ射线衍射（ＸＲＤ）和热重一差热（ＴＧ－ＤＴＡ）等分析方法进行了研究。试验表明，溶胶－凝胶法制备ＹＳＺ超细粉末的反应过程分为：水份和有机溶剂的挥发；有机基团的燃烧和无定形Ｚｒ０２的形成；无定形Ｚｒ０２向立方要Ｚｒ０２的转变三个阶段。在４７０℃时，凝胶转变为ＹＳＺ固溶体，形成立方相Ｚｒ０２结     

BAS玻璃陶瓷的晶化行为与性能

用ＸＲＤ，ＤＴＡ，ＳＥＭ，ＴＥＭ和三点弯曲试验研究了溶胶－凝胶法合成的ＢＡＳ（ＢａＯ．Ａｌ２Ｏ３．２ＳｉＯ２）凝胶玻璃的结晶行为，晶型转变和热压ＢＡＳ的显微结构与性能，结果表明，ＢＡＳ凝胶玻璃法〉１０００℃时开始析晶，１１００℃时完全晶化，结晶相为六方钡长石，不加成核剂，呈现整体结晶特性，晶粒小于１μｍ加入５０ｍｇ．ｇ＾－１单斜钡长石作为晶种，可促进六方→单斜晶型转变，在１２５０℃处理７ｈ约有８０     

NON-ISOTHERMAL SINTERING OF COMPOSITES α-Al_2O_3AND A GLASS IN CaO-Al_2O_3-SiO_2-B_2O_3 SYSTYEM

用ＤＴＡ，ＸＲＤ及压汞方法了研究了α－Ａｌ２Ｏ３与ＣａＯ－Ａｌ２Ｏ３－ＳｉＯ２－Ｂ２Ｏ３系玻璃复合材料的等速升温烧结与相组成，实验表明；在７００－９００℃后由于闭气孔大量生成使致密化速度减慢，钙长石是由玻璃析晶及α－Ａｌ２Ｏ３与玻璃在＞７００℃反应生成。     

透明BaO·B2O3玻璃陶瓷的表面形貌、结构特征及光学性能

以ＢａＣＯ３、Ｈ３ＢＯ３为原料，经高温熔融及控制热处理，获得了ＢａＯ·Ｂ２Ｏ３透明玻璃陶瓷。利用ＸＲＤ、ＳＥＭ等手段研究了该材料的结构特征及表面形貌。结构表明，在玻璃表面得到了含有单一β－ＢａＢ２Ｏ４（ＢＢＯ）晶相结构的析晶薄膜层，薄膜表面均匀，单膜厚度约２μｍ，晶粒平均尺寸约０．２μｍ，且微晶粒沿α轴方向优先生长；析晶优先从玻璃表面开始向内部进行，形成晶化层－玻璃－晶化层三元“夹心”结构。该玻璃     

Certification Institutions Expected to Update and Transfer Information on Present Standards

Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.……     

Optimum-Simulation von Ernteprozessen

Zusammenfassung Bei der Gestaltung von Ernteprozessen — beispielsweise des Prozesses Mähdrusch, Körnertransport und -abnahme — als transportverbundene Fließarbeitsverfahren mit mindestens zwei verschiedenen Arbeitsmitteln gibt es einen großen Optimierungsspielraum. Solche Prozesse sind mehrstufige Bedienungsprozesse mit gemischter Anordnung der Bedienungseinrichtungen. Außerdem besitzen sie stark ausgeprägte räumliche Aspekte. Es wird vor allem gezeigt, welche Merkmale solcher Prozesse in Simulationsmodellen abgebildet sein müssen, welche Zielgrößen in Abhängigkeit von welchen Einflußgrößen unter Berücksichtigung welcher Prozeßbedingungen ermittelt werden sollten und wie der Bewertungsprozeß zur Ermittlung der gewünschten Informationen gestaltet werden muß.     

Brainstorming for ISO Strategy 2016-2020

正Responding to ISO’s appeal for survey for the to-be-developed ISO Strategy Plan for 2016-2020,SAC hosted a special workshop over the needs and comments of various fi elds on June 8 in Beijing.The workshop was attended by ISO President-elect and Ansteel General Manager Zhang Xiaogang,SAC Vice-Administrator Yu Xinli,and 30 experts from     

CNAS Passes APLAC's PTP Review

正The review group of Asia Pacific Laboratory Accreditation Cooperation(APLAC)carried out a 4-day peer review of the proficiency testing provider(PTP)for China National Accreditation Service for Conformity Assessment(CNAS)from July 28 to 31,2014.CNAS passed the PTP review with excellent performance.Two senior peer reviewers of APLAC made a comprehensive,rigorous and detailed review of CNAS’s PTP accreditation activities,and made the on-spot inspection of the review groups in Shanghai and Shenzhen respectively.     

新闻(英文)

正China and Greece Sign the Standardization Cooperation Agreement Witnessed by Chinese Premier Li Keqiang and Greek Prime Minister Antonis Samaras,AQSIQ Minister Zhi Shuping and ELOT Chairman and Executive Director Angelos Tolkas signed the SAC-ELOT Standardization Cooperation Agreement.The Agreement is one of the critical cooperation documents signed during Li Keqiang’s visit in Greece,encouraging China and Greece to     

Win-Win Cooperation

正The Chinese Premier Li Keqiang's recent trip to the UK has reinforced the China-UK comprehensive strategic partnership;just as the British Prime Minister David Cameron put it,"the relationship is gaining in strength,depth and understanding"after a bucket of business deals being inked worth more than 30 billion US dollars.From the first agreement signing in 2004 to the new agreement of mutual standards recognition and adoption in     

Systematic Approach for Emerging Industry

正A national directory of standards complexes for strategic emerging sectors was recently developed and released jointly by 12governmental departments,namely,SAC,NDRC,MOST,MIIT,MEP,MOA,AQSIQ,State Forest Administration,State Administration of Science and Technology for National Defense,State Oceanic Administration and National Railway Administration.     

Strictest Pollutants Emission Standards

正Four new national standards on air pollutant emission control offi cially issued by the Ministry of Environment Protection(MEP)together with AQSIQ and SAC has been brought into force from July 1,2014.The Emission standard for air pollutants of coal-burning,oil-burning and gasfi red boilers,which is the strictest emission standard historically,will tackle the stubborn pollution problem of boilers and waste incineration in most of China’s regions.     

Instructions to Authors

New Carbon Materials is a bimonthly journal published with the permission of the Ministry of Science and Technology and of the State News and Publication Agency.The journal is sponsored by the Institute of Coal Chemistry,Chinese Academy of Sciences,and is published by Science Press.Aims and Scope     

Progress on Standards Copyright Protection

正Recently,National Copyright Administration of China(NCAC)has rewarded 215 organizations and 179 individuals for their outstanding efforts on investigating standards copyright infringement and piracy in 2013.Hua Jianhua,the Deputy-Director of National Standards Copyright Protection Workgroup Office won a third prize of the national individual award.In 2012,SAC set up the national standards copyright protection working group,and developed policies to crack down standards infringement and piracy behaviors and to strengthen standards copyright protection.