STUDY ON COMPREHENSIVE UTILIZATION OF COBALTIFEROUS SLAG

ＳＴＵＤＹＯＮＣＯＭＰＲＥＨＥＮＳＩＶＥＵＴＩＬＩＺＡＴＩＯＮＯＦＣＯＢＡＬＴＩＦＥＲＯＵＳＳＬＡＧＧｕｏＢｉｎｇｋｕｎ；ＸｉａｏＬｉｘｉｎ（ＩｎｓｔｉｔｕｔｅｏｆＭｅｔａｌｌｕｒｇｉｃａｌＰｈｙｓｉｃｏｃｈｅｍｉｓｔｒｙａｎｄＭａｔｅｒｉａｌｓ，Ｃ...     

等离子分解锆英石制备ZrO2—SiO2—Al2O3 复相陶瓷

离子分解锆英石（ＰＤＺ,ｐｌａｓｍｉｃａｌｌ ｄｅｃｏｍｐｏｓｅｄ ＺｒＯ２）ＧＮ Ｌ２Ｏ３注浆成型反应烧结制备ＺｒＯ２－ＳｉＯ２－Ａｌ２Ｏ３系复相陶瓷,与用锆英粉和Ａｌ２Ｏ３制备的该系复相陶瓷进行对比。采用ＸＲＤ、ＯＭ、ＳＥＭ等手段研究烧成后材料的物相组成、显微结构及物理性能。结果表明：ＺｒＳｉＯ４的分解先于莫来石开成;由ＰＤＺ制得的制品性能优于锆英是的制品;ｎ（Ａｌ２Ｏ３）／ｎ（ＰＤＺ）＝３／     

ZrO2对热压Si3N4陶瓷材料断裂韧性及显微结构的影响

研究了ＺｒＯ２对热压Ｓｉ３Ｎ４陶瓷材料的断裂韧性Ｋｉｃ、显微结构及结构组成的影响。结果表明，Ｚｒｏ２的含量对Ｓｉ３Ｎ４陶瓷的断裂韧性有显著影响，在１０ｗｔ％时出现峰值ＫＩＣ为７．８３ＭＰａ．ｍ＾１／２，提高约２１．４％，热压Ｓｉ３Ｎ４－ＺｒＯ２系统中能有效地撸制ＺｒＮ的生成。     

GEOELECTROMAGNETIC FIELDS AND THEIR FRONTIERS OF STUDY

ＧＥＯＥＬＥＣＴＲＯＭＡＧＮＥＴＩＣＦＩＥＬＤＳＡＮＤＴＨＥＩＲＦＲＯＮＴＩＥＲＳＯＦＳＴＵＤＹ￥ＨｅＪｉｓｈａｎ（ＣｅｎｔｒａｌＳｏｕｔｈＵｎｉｖｅｒｓｉｔｙｏｆＴｅｃｈｎｏｌｏｇｙ，Ｃｈａｎｇｓｈａ，４１００８３，Ｃｈｉｎａ）Ａｂｓｔｒａｃｔ：Ｉ...     

The diagnosis of the dynamic systems using the methods of the theory of sensitivity

1　ＴＨＥＵＳＩＮＧＯＦＴＨＥＭＯＤＥＬＯＦＴＨＥＳＴＲＵＣ ＴＵＲＡＬＳＥＮＳＩＴＩＶＩＴＹＴｈｅｈｙｐｏｔｈｅｓｉｓａｂｏｕｔｔｈｅｐｏｓｓｉｂｉｌｉｔｙｏｆａｐｐｅａｒａｎｃｅｉｎｔｈｅｏｂｊｅｃｔｏｆｄｉａｇｎｏｓｉｓ (ＯＤ)ｏｎｌｙｏｆｓｉｎｇｌｅｄｅｆｅｃｔｓｍａｋｅｓｐｏｓｓｉｂｌｅｄｅｃｒｅａｓｅｔｈｅｖｏｌｕｍｅｏｆｄｉａｇｎｏｓｔｉｃｉｎｆｏｒｍａｔｉｏｎｂｅｅｎｕｓｅｄｉｎｆａｕｌｔｄｅｔｅｃｔｉｏｎ .ＴｈｅｓｉｎｇｌｅｄｅｆｅｃｔｏｆＯＤｉｓｔｈｅｃｈａｎｇｅｏｆｉｔｓｔｅ…     

Experimental Study of Producing High Pureand Ultra Fine ZnO Powder by Vacuum Ejector

ＥｘｐｅｒｉｍｅｎｔａｌＳｔｕｄｙｏｆＰｒｏｄｕｃｉｎｇＨｉｇｈＰｕｒｅａｎｄＵｌｔｒａＦｉｎｅＺｎＯＰｏｗｄｅｒｂｙＶａｃｕｕｍＥｊｅｃｔｏｒ①ＷａｎｇＨｕａ（ＤｅｐａｒｔｍｅｎｔｏｆＭｅｔａｌｕｒｇｙ,ＫｕｎｍｉｎｇＵｎｉｖｅｒｓｉｔｙｏｆＳｃｉ...     

PREPARATION OF Bi－SYSTEM SUPERCONDUCTOR USING SOL－GEL METHOD

ＰＲＥＰＡＲＡＴＩＯＮＯＦＢｉ－ＳＹＳＴＥＭＳＵＰＥＲＣＯＮＤＵＣＴＯＲＵＳＩＮＧＳＯＬ－ＧＥＬＭＥＴＨＯＤＹｉｎＺｈｏｕｌａｎ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，ＣｅｎｔｒａｌＳｏｕｔｈＵｎｉｖｅｒｓｉｔｙｏｆＴｅｃｈｎｏｌｏｇｙ，Ｃｈａ...     

Nearly Degenerate Four-Wave Mixing in Semiconductor-doped Glasses

ＮｅａｒｌｙＤｅｇｅｎｅｒａｔｅＦｏｕｒ┐ＷａｖｅＭｉｘｉｎｇｉｎＳｅｍｉｃｏｎｄｕｃｔｏｒ┐ｄｏｐｅｄＧｌａｓｓｅｓＺＨＡＮＧＹｕｎ（张云）ＺＨＡＯＦｅｎｇ（赵峰）（Ｄｅｐｔ．ｏｆＡｐｐｌｉｅｄＰｈｙｓｉｃｓ，ＨａｒｂｉｎＩｎｓｔｉｔｕｔｅｏｆＴｅ...     

A Review of＂Some Basic Principles of Teacher Training＂and＂British and American Methodology＂in NEW ORIENTTIONS IN THE TEACHING OF ENGLISH By Peter Strevens

ＡＲｅｖｉｅｗｏｆ＂ＳｏｍｅＢａｓｉｃＰｒｉｎｃｉｐｌｅｓｏｆＴｅａｃｈｅｒＴｒａｉｎｉｎｇ＂ａｎｄ＂ＢｒｉｔｉｓｈａｎｄＡｍｅｒｉｃａｎＭｅｔｈｏｄｏｌｏｇｙ＂ｉｎＮＥＷＯＲＩＥＮＴＴＩＯＮＳＩＮＴＨＥＴＥＡＣＨＩＮＧＯＦＥＮＧＬＩＳＨＢｙＰｅｔｅ...     

THE DYNAMICAL LOADING ON ROCK WITH DIFFERENT LOADING WAVE SHAPES CONVENTIONAL SHPB

ＴＨＥＤＹＮＡＭＩＣＡＬＬＯＡＤＩＮＧＯＮＲＯＣＫＷＩＴＨＤＩＦＦＥＲＥＮＴＬＯＡＤＩＮＧＷＡＶＥＳＨＡＰＥＳＣＯＮＶＥＮＴＩＯＮＡＬＳＨＰＢ＊ＸｕＪｉｃｈｅｎｇＬｉＸｉｂｉｎｇ（ＩｎｓｔｒｕｍｅｎｔＴｅｓｔａｎｄＡｎａｌｙｓｉｓＣｅｎｔｒｅ,Ｃｅｎ...     

SnO2超微粒非晶薄膜对n—Si光电效应的影响

用等离子激活化学气相沉积（ＰＥＣＶＤ）法制备了ＳｎＯ２超微粒非晶薄膜。Ｘ－光电子能谱分析结果表明ＳｎＯ２中的Ｏ／Ｓｎ经超过化学计量比。ｎ－Ｓｉ和ＳｎＯ２／ｎ－Ｓｉ的表面光电压谱显示,ＳｎＯ２薄膜的处理条件不同,光电压响应所需光强也不同。将ＳｎＯ２薄膜沉积在ｎ－Ｓｉ上,可使其光电转换效率提高３个数量级以上,并且也能使ｎ－Ｓｉ光电流和光电压有所提高。     

Oriented Growth of PZT thick film embedded with PZT nanoparticles

This paper reports that dense and crack-free(100)oriented lead zirconate titanate(Pb(Zr0.52Ti0.48)O3,PZT)thick film embedded with PZT nanoparticles has been successfully fabricated on Pt/Cr/SiO2/Si substrate by using PT transition layer and PVP additive.The thick film possesses single-phase perovskite structure and perfectly(100)oriented.The(100)orientation degree of the PZT films strongly depended on annealing time and for the 4 μm-thick PZT film which was annealed at 700 ℃ for 5 min is the largest.The(100)orientation degree of the PZT thick film gradually strengthen along with the thickness of film decreasing.The 3 μm-thick PZT thick film which was annealed at 700 ℃ for 5 min has the strongest(100)orientation degree,which is 82.3%.     

三明治结构薄膜的铁电性及蒙特卡罗算法模拟

用溶胶-凝胶方法在Pt/Ti/SiO2/Si衬底上制备了BaTiO3/BiFeO3/BaTiO3三明治结构薄膜。XRD测试结果表明薄膜由BaTiO3相和BiFeO3相构成。通过铁电性测量在薄膜中观察到了反铁电极化。对薄膜中存在的反铁电性进行了基于伊辛模型的蒙特卡罗模拟。模拟结果表明薄膜中的反铁电性来自不同铁电层之间的反铁电耦合。     

Preparation and properties of SrBi_(2.2) Ta_2O_9 thin film

1INTRODUCTION Ferroelectricfilmshaveattractedmuchatten tionduetotheirpotentialapplicationsinelectronic devices,suchaspyroelectricinfrareddetectors,opticalswitches,actuators,dynamicrandomac cessmemories(DRAMS)[1,2],andnon volatile randomaccessmemories(NVRAMS)[3,4].Re cently,thereisinterestinthestudyofbismuthlayerstructuredferroelectricmaterialsformemory applications.Inparticular,strontiumbismuthtan tanate(SBT),oneofthebismuthlayerstructuredcompounds,isapromisingcandidateforferroelec t…     

单层膜厚对钙锶铋钛钕薄膜结构及性能的影响

采用Sol—Gel法和层层快速退火工艺,通过控制甩膜转速在Pt／Ti/SiO2／Si基片上制备了单层膜厚不同的钙锶铋钛钕（C0.4S0.6NT）铁电薄膜。研究了单层膜厚对于C0.4S0.6NT铁电薄膜的结构及性能的影响。研究结果表明：适当的单层膜厚有利于薄膜在（200）方向的择优取向,有利于薄膜的铁电性能。单层膜厚为60nm时,C0.4S0.6NT薄膜具有优良的铁电性能,2Pr和2Ec分别为24．155μC／cm^2、148．412kV／cm,具有较高的应用价值。     

衬底效应对LiTaO3薄膜制备的影响

用溶胶凝胶法在N型硅、P型硅、石英、铂、镍衬底上制备了钽酸锂(LiTaO3)薄膜,用XRD和SEM对钽酸锂薄膜性能参数进行了表征;发现掺杂少量环氧树脂能提高钽酸锂薄膜的均匀性,改善薄膜与衬底的粘附性;研究了衬底效应与薄膜厚度的关系,薄膜厚度超过0.2 μm,Ni衬底的XRD峰值强度几乎不再出现,说明衬底对薄膜初始结晶取向有重要影响;利用不同衬底上生长钽酸锂薄膜,XRD研究结果表明:N型硅、P型硅、石英衬底上只能制备多晶钽酸锂薄膜,铂衬底上制备的钽酸锂薄膜在(012)晶向有强大的择优取向性,镍衬底上制备的钽酸锂薄膜有更好的C轴择优取向性,C轴择优取向系数可达0.082。     

TiO_2薄膜的亲水性及光催化自清洁效果

以溶胶-凝胶法为基础,在普通玻璃表面制备了具有纳米尺寸气孔、纳米及微米尺寸复合气孔结构的TiO2薄膜或TiO2/SiO2复合薄膜,并考察了它们的亲水性能及表面经空气中灰尘污染后,其超亲水性能在紫外光照射下的恢复能力。所有纯TiO2薄膜于制备后测试的表面水接触角均达到0°。SiO2的掺杂量较小（10%）时,SiO2的掺入增大了薄膜的水接触角,但随着SiO2掺杂量的增大,接触角减小,可达到超亲水效果。表面污染的薄膜经紫外光照射后,其超亲水性的光致恢复能力基本不受前驱体溶胶的陈化时间、SiO2掺杂浓度、表面形态的影响,但与薄膜的光催化活性有关。4层以上的薄膜或带有SiO2中间隔离层的薄膜由于可以抑制玻璃基底中Na＋扩散至薄膜表面,光催化降解灰尘污染物的能力较高,紫外光照射后均能恢复其超亲水性能。     

Effect of Mg-film thickness on the formation of semiconductor Mg2Si films prepared by resistive thermal evaporation method

Mg fi lms of various thicknesses were deposited on Si(111) substrates at room temperature by resistive thermal evaporation method, and then the Mg/Si samples were annealed at 40 ℃ for 4 h. The effects of Mg fi lm thickness on the formation and structure of Mg2Si fi lms were investigated. The results showed that the crystallization quality of Mg2Si fi lms was strongly infl uenced by the thickness of Mg fi lm. The XRD peak intensity of Mg2Si(220) gradually increased initially and then decreased with increasing Mg fi lm thickness. The XRD peak intensity of Mg2Si(220) reached its maximum when the Mg fi lm of 380 nm was used. The thickness of the Mg2Si fi lm annealed at 400 ℃ for 4 h was approximately 3 times of the Mg fi lm.     

酯化改性纳米二氧化硅及其在聚酯漆中应用

采用液相萃取法,通过四氢呋喃从水相中萃取出硅酸,经有机醇共沸蒸馏,制备了表面酯化改性纳米二氧化硅的醇分散液,其外观透明、均匀稳定,二氧化硅含量可高达35%,达到纳米级分散。研究了在少量纳米二氧化硅作用下,纳米复合聚酯涂膜的物理机械性能。结果表明,少量纳米SiO2能提高涂膜的硬度、耐磨性和紫外吸收性能,不影响透明度。     

溶胶-凝胶法制备高透光SiO2/ATO-SiO2双层疏尘薄膜

为了避免灰尘在户外玻璃上的粘附导致透过率下降的现象,采用溶胶一凝胶法在石英玻璃上制备高透光SiO2/ATO-SiO2双层疏尘薄膜,研究SiO2基层薄膜对薄膜组织和性能的影响;利用原子力显微镜、紫外-可见-近红外分光光度计、霍尔效应测量仪、自制落灰实验装置对薄膜的三维表面形貌进行表征,并对其光电性能、疏尘性能进行了测试....