高压钠灯用铌带的生产工艺研究

本文叙述了用铌锭经过冷加工生产制作高压钠灯的关键材料铌带的工艺流程,在进行大量工艺实验的基础上,确定了重要的工艺参数,总结出了一套可行的工艺路线,并提出了应用于生产实践的控制产品质量的方法,应用本工艺生产的铌带达到了国际水平。     

玻璃基板上溶胶凝胶法铌酸锂薄膜的制备及其表征

用溶胶凝胶法在玻璃基板上以LiNb（OR）6先驱体溶液（用甲酸作稳定剂,乙二酸作对照实验）制备了铌酸锂薄膜,并对薄膜进行了IR、XRD和SEM表征,结果表明,生成的铌酸锂为多晶,与乙二酸相比,用甲酸作稳定剂制备的铌酸锂薄膜形貌更好。     

Chemically processed Nb-doped SrTiO3 films and properties

Homogeneous, crack-free SrNb_xTi_1−x O₃ thin films on (110) silicon substrates were successfully fabricated by sol-gel processing. The optimum route and conditions were systematically investigated. Sr(OAc)₂ glacial acctic acid solution, after being refluxed and reacted with tartrate, formed Sr(OAc)₂(C₄H₆O₆)₂; Ti(OBu)₄ formed Ti(OAc)_4−x (AcAc)_x after having the ligand partially exchanged with AcAc, while Nb(OC₂H₅)₅ formed (OAc)₂Nb(AcAc) (C₄H₆O₆) by exchanging of ligand in glacial acetic acid with (CH₃CO)₂O. All the metal species after undergoing partial hydrolysis and polymerization with hydroxyl or oxygen, formed SrNb_xTi_1−x O₁₃ cluster sol. Methyl cellulose (MCL) caused SrNb_xTi_1−x O₃ sol to have polymeric structure and easily form films. SrNb_xTi_1−x O₃ films with perovskite were subsequently formed after being annealed at 650∼750 °C for 60 min in 25% N₂+75% H₂ (volume ratio) atmosphere. Resistivity of the SrNb_0.1Ti_0.9O₃ films at room temperature was 64 μω·cm, a particular T ² temperature dependence of the resistivity, from 25 K up to room temperature, was observed. Project (No. 2002CB613305) supported by the National Basic Research Program (973) of China     

钽铌湿法冶炼“三废”治理技术与探讨

分析介绍了钽铌湿法冶炼过程中＂三废＂污染来源、特点及分布情况;针对性介绍了不同钽铌矿料分解工序中的废气,采用不同的治理工艺流程及设备;运用废渣（电石渣）来处理废水的方法。     

A novel three-component hybrid-integrated optical accelerometer based on a Mach-Zehnder interferometer with a LiNbO3 photoelastic waveguide

An investigation of the properties ofa LiNbO3 photoelastic waveguide via the acceleration-induced effect is presented. A novel three-component hybrid-integrated optical accelerometer based on a Mach-Zehnder interferometer with a LiNbO3 photoelastic waveguide has been designed, which is capable of detecting seismic acceleration in high-accuracy seismic exploration. The Mach-Zehnder interferometer was successfully fabricated and a lighting test used to check its quality. The frequency response characteristic of the accelerometer was measured2 The accelerometer with a resonant frequency of 3549 Hz was demonstrated to show good linear frequency responding characteristics in the range of 100-3000 Hz. The accelerometer also shows good stability and consistency. Experimental results indicate that the outputs of the on- and cross-axis are 147 and 21.3 mV, respectively.     

溶胶-凝胶法制备铌酸锂薄膜的制约因素

介绍了溶胶-凝胶法制备铌酸锂薄膜的具体过程。指出了影响制备高质量铌酸锂的薄膜的因素及改善,着重介绍先驱液的稳定性、衬底选择以及热处理等。     

CID型ICP光谱仪测定钢中微量铌钒

本文叙述了应用ICP-AES光谱仪测定钢中微量铌、钒的方法,对测试条件及测试结果进行讨论,已用于钢产品中微量铌、钒的测试,获得了理想的分析结果,满足了工作需要.     

广西栗木花岗岩型锡铌钽矿床地质特征及控矿因素

恭城栗木矿区花岗岩型锡铌钽矿床产于花岗岩体的顶突部位。矿体产状、形态、有用组分的分布明显受花岗岩及断裂构造控制。花岗岩浆侵位、断裂构造及围岩蚀变是区内含锡铌钽花岗岩型矿床形成的重要控制因素。     

Mg:Er:Yb:LiNbO3晶体的结构和光学性质

采用阳离子掺杂方法制备了Mg:Er:Yb:LiNbO3晶体,获得了光折变效率高和不影响其它性能的激光晶体.为了探究铌酸锂晶体的微观结构对光学性质的影响,测量了Mg:Er:Yb:LiNbO3晶体的折射率和晶格常数.分析了晶格常数变化的因素和寻常光折射率、非常光折射率变化的因素,这两种性质与Er3 /Yb3 成分的关系不是完全单调变化的,在晶体中,Er3 /Yb3 浓度在1.1—1.2mol%范围内时观察到异常变化.给出了铌酸锂晶体结构对折射率影响的关系,Er3 /Yb3 掺杂LiNbO3晶体的两个主折射率随晶格畸变ca增大而增大.Er3 /Yb3 双掺杂对折射率和晶格常数的变化行为可以用稀土离子浓度影响锂空位浓度和稀土离子在晶体内的位置来解释.     

铒掺杂铌铟酸铅-铌镁酸铅-钛酸铅的光学性质研究

生长了一种新配比的铒掺杂铌铟酸铅-铌镁酸铅-钛酸铅单晶(25PIN-44PMN-31PT-0.02Er2O3),并对晶体做了完整的冷加工和极化,得到了沿001方向极化的晶体样品.在室温下利用椭圆偏振仪测量了晶体的折射率谱,通过最小二乘法拟合得到了晶体的赛尔迈耶尔方程各参数.其中Eo=5.471 eV;Ed=22.56 eV;!o=227 nm;So=0.800 2×1014m-2.利用紫外-可见-红外分光光度计获得了晶体透射率谱,晶体紫外吸收边为400 nm.同时通过计算得到了样品的禁带宽度为2.94 eV.