Nb2O5掺杂对ZnO压敏电阻器电性能的影响

本文研究了Ｎｂ＿２Ｏ＿５掺杂以及Ｎｂ＿２Ｏ＿５与ＺｎＯ煅烧对ＺｎＯ压敏电阻器电性能的影响。实验表明，Ｎｂ＿２Ｏ＿５的掺入使压敏电场减少，当Ｎｂ＿２Ｏ＿５含量为０．１％ｍｏｌ时，其压敏电场最小．非线性系数最大。煅烧温度越高，压敏电场越高，非线性系数越大。     

0.64BaTi4O9-0.36BaEu2Ti4O12/BaTi4O9纤维复合陶瓷的相结构研究

利用XRD，XPS和TEM等测试手段对0.64BaTi4O9-0.36BaEu2Ti4O12/BaTi4O9纤维复合陶瓷新材料的相结构进行了研究。研究结果表明：随着BaTi4O6纤维的加入，烧结试样表面O元素的含量提高，材料中Ti^3 离子和Ti^2 离子的含量降低，材料介电性能有所提高。     

发泡金属的开发、性质及应用(Ⅰ)──发泡金属的制备方法

系统地综述了发泡金属的生产方法，包括铸造法、粉末冶金法、烧结法、沉积法和高压浸透法等。介绍了各种方法的特点及适用范围，指出了它们的优缺点及相应的改进措施，并对今后的发展方向提出了建议。     

Pb（Sc1／2Ta1／2）O3铁电体的有序结构和介电性质）

通过铌铁矿预合成法制备Ｐｂ（Ｓｃ１／２Ｔａ１／２）Ｏ３（ＰＳＴ）陶瓷，经适当的热处理获得了钙钛矿化合物Ｂ位离子的高有序和高无序试样，ＰＳＴ陶瓷的介电性质研究结果表明，高有序试样（Ｓ＝０．７７）的居里温度为２９℃，并具有较低的介电常数表现出普通铁电体性质特征，而高元序试样（Ｓ＝０）具有很高的介电常数，并表现出明显的弥散性相转变和Ｔｍ的频率色散行为，即高介电常数的驰豫铁电体性质。文中还利用ＸＲＤ，ＳＥ     

多孔粒状铵油炸药在边坡预裂爆破中的应用

通过工程实践，介绍了利用多孔粒状铵油炸药进行边坡预裂爆破的设计原理及施工工艺。该技术能确保预裂爆破质量。简化施工工序，大幅度降低爆破成本。技术经济指标优越。     

结构陶瓷的空蚀性研究

利用转盘装置测量了ZrO2、Si3N4和Al2O3／Ti(NC)等陶瓷材料受到水的空蚀破坏的体积损失,通过SEM观察和XRD分析,探讨了微观结构和抗空蚀性能的关系。     

驻极体声传感器及其储电材料的现状

综述了驻极体声传感器及其储电材料近年来的迅猛发展。传统的FEP(tetrafluoroethylene—hexa—fluoropropylene copolymer)极体电容式声传感器及以铁电聚合物PVDF(poly vinylidene fluoride)家族为芯片的声传感器和超声抉能器仍焕发着青春活力。Si基微型驻极体声传感器的理论和实验研究已经日趋成熟，而用空间电荷型多孔聚合物驻极体压电薄膜为芯片可望研制出新一代声电和电声传感器、压力传感器和驱动器。     

Flow of solutions of hydroxypropyl guar-poly(ethylene oxide) mixtures through a porous medium

Summary In flow through porous media, solutions of poly(ethylene oxide) (PEO) exhibit extension thickening, whereas hydroxypropyl guar (HPG) solutions are shear-thinning at high concentrations. The results show that the extension-thickening exhibited by PEO solutions becomes less critical with increasing flow rate as the concentration of HPG in the solution is increased. At high concentrations of HPG, the presence of PEO inhibits the shear-thinning behaviour, without increasing the apparent viscosity of the solution. The presence of HPG reduces the rate and extent of degradation of PEO in the flowing solution.     

Thermal Shock Behavior of Porous Silicon Carbide Ceramics

Using the water-quenching technique, the thermal shock behavior of porous silicon carbide (SiC) ceramics was evaluated as a function of quenching temperature, quenching cycles, and specimen thickness. It is shown that the residual strength of the quenched specimens decreases gradually with increases in the quenching temperature and specimen thickness. Moreover, it was found that the fracture strength of the quenched specimens was not affected by the increase of quenching cycles. This suggests a potential advantage of porous SiC ceramics for cyclic thermal-shock applications.