金属加强网防火涂料在海洋平台的应用

根据某石油平台中金属加强网膨胀型防火涂料设计应用与施工经验,阐述海洋石油平台碳氢防火等级分类和防火涂料厚度设计,涂层厚度与截面因子和临界变形温度之间关系,金属增强网设计与安装,膨胀型防火涂料施工工艺,施工方法以及质量控制方法。     

Li含量、沉淀时间以及溶液浓度对Y2O3:Eu(5％),Li(x％) 薄膜的形貌和光学性质影响

利用电化学沉积法制备Li掺杂的Y₂O₃:Eu(5％)荧光薄膜,并且研究了Li含量,沉积时间和溶液浓度对样品的表面形貌和发光强度的影响。结果表明,所制备的Y₂O₃:Eu(5％), Li(x％) 荧光发光薄膜具有立方晶体结构,当x=15时候,形貌和发光强度表现为最佳。     

VO43-在R2V2O7:Eu3+（R=Sr,Ca,Ba）的宽带发射（英文）

R2V2O7:Eu3+(R=Ca,Sr,Ba)样品由溶胶凝胶法制备。研究了样品的发光性能。随着R离子半径的增加,样品的发射光谱出现了一个450～750nm宽的发射宽带。发射谱在617nm的发射峰来自于Eu3+的5D0-7Fj的跃迁,除此之外,在510nm出现了另一最强发射峰,归因于VO43-离子团的本质的发射。另外,可以改变R离子半径来控制蓝绿光和红光强度的比例,这可能是一个很好的应用。     

Photoluminescence properties and effect of Bi~（3＋） dopant of Eu~（3＋） and Dy~（3＋） co-doped Sr_3V_2O_8

Photoluminescence properties of Sr 2.5 Dy 1/3-x Eu x V 2 O 8(x=0,0.06,0.12,0.18,0.24,0.33) were investigated.The excitation spectra included a broad band in the short wavelength region and several sharp lines in the longer wavelength region,and the spectral origin were discussed.The emission spectra were measured in two different exciting ways,i.e.,exciting the VO 4 group at 270 nm and the Eu 3+ ion at 398 nm,respectively,and the energy transferring process was reasonably suggested.Furthermore,multi-color emission could be achieved in Sr 2.5 Dy 1/3-x Eu x V 2 O 8,indicating that the studied samples had potential applications in the white light emitting diodes.Further investigation showed that reducing the concentration of Eu 3+ and Dy 3+ and introducing Bi 3+ as a sensitizer ion greatly enhanced the emission intensity.     

CoFe2与CoFe2O4质量比及MgO稀释对CoFe2@CoFe2O4磁性的影响

采用金属有机盐热分解方法制备了MgO包覆的CoFe₂O₄纳米粒子（CoFe₂O₄@MgO）,然后将CoFe₂O₄@MgO在H₂中还原,接着在空气中氧化制备了一组CoFe₂@CoFe₂O₄@MgO样品;用盐酸溶液溶解CoFe₂@CoFe₂O₄@MgO中的MgO获得另一组样品（CoFe₂@CoF₂O₄）。测量并绘制了CoFe₂@CoFe₂O₄@MgO和CoFe₂@CoF₂O₄的磁化强度随外磁场及温度变化的关系曲线。随着氧化温度升高,CoFe₂@CoFe₂O₄@MgO和CoFe₂@CoF₂O₄的矫顽力H_c、饱和磁化强度M_s、剩磁比M_r/M_s及磁有序状态发生显著变化,这些变化强烈依赖于磁性粒子的各向异性及粒子间的偶极相互作用。     

Thermoelectric properties of Sr0.9La0.1TiO3 and Sr2.7La0.3Ti2O7 with 15%Ag addition

15%Ag-added cubic perovskites Sr0.9La0.1TiO3 and Ruddlesden-Popper （RP） phases Sr2.7La0.3Ti2O7 were fabricated via hydrothermal synthesis, cold pressing and high-temperature sintering. The structure and thermoelectric properties were also investi-gated for all samples. The results indicated that Ag precipitated as a second phase. Ag addition made electrical conductivity and ab-solute Seebeck coefficient enhanced, as a result, the ZT values were enhanced both for two series. Compared with cubic perovskite, RP phase was subjected to smaller impact by Ag addition. The reasons for enhancing ZT value and the different impact for two series by Ag addition were also discussed.     

超音速火焰喷涂钴基陶瓷涂层的组织与性能研究

本文在氧气流量和喷涂距离一定的条件下,研究了燃气流量对超音速火焰喷涂WC-Co涂层显微组织、相结构及性能的影响。结果表明:燃气流量低的涂层结合强度、显微硬度最低,孔隙率最大;燃气流量适中的涂层结合强度最高,显微硬度低于另外两种涂层,燃气流量最高的涂层,燃气流量高的涂层的显微硬度最大。     

牺牲阳极设计与检测方法

阴极保护在腐蚀防护领域被广泛使用,海洋结构物飞溅区以下通常采用阴极保护方式进行腐蚀防护。本文在总结国内外各种常用阴极保护设计方法、标准和工程实践基础上,对海洋结构物常用牺牲阳极阴极保护设计方法进行了对比分析;针对铸造阳极质量检测过程中遇到的问题,提出了相应的建议及解决措施。     

典型半潜平台淡水舱特涂工艺设计与应用

以半潜式平台淡水舱为例,介绍了半潜平台项目液舱特涂涂装工艺的设计与施工工艺。着重对冬季低温季节的特涂施工技术以及流程进行了总结和分析,实际结果表明,此工艺在低温工况下取得良好效果,得到了业主的广泛认可。     

共沉淀法制备的锶铁氧体磁粉的结构、形貌及磁性能

采用共沉淀法按照n(Fe)∶n(Sr)=10∶1合成M型锶铁氧体.通过把样品在不同的温度下退火,研究了退火温度对晶体结构、形貌和磁性能的影响.所制备的样品用FTIR、XRD、SEM和VSM进行表征.结果表明,当退火温度为1000℃时样品颗粒分布规则且比饱和磁化强度达最大值,为77.87emu/g.当退火温度为1100℃时样品颗粒变成球形且矫顽力最小,为1601Oe.此外,通过控制退火温度可使矫顽力在1601～4591Oe范围内变化.