Formation of medium-range order in fluoride glasses

A possible solution to the problem of determining the medium-range order in fluoride glasses is proposed. The model of the formation of the glass network is advanced on the basis of the complex-cluster model for salt melts and the percolation hypothesis. The determination of the glass network topology reduces to the experimental determination of the percolation point and the geometric estimation of the second coordination number of a glass-former. It is shown that the functionalities of glass-formers as determined from both the percolation point and the crystal chemical constraints turn out to be identical.     

Mechanical Effects on the Lining of Rotary Cement Kilns

Results of studies concerned with mechanical effects on the lining of cement rotary kilns are reviewed. Stresses arising from strains of the kiln casing and from slippage of the lining against the kiln casing are considered, and mechanical effects exerted by the calcined material on the lining are discussed.     

Thermoluminescence Characteristics of SrB6O10 ： Tb

SrB6010：Tb phosphor was synthesized by high-temperature solid state reaction. The influences of Ce or Li as a co-dopant, Tb concentration and irradiation dose exposure on TL of SrB6010 ： Tb were investigated. Results show that Ce or Li as a co-dopant can not improve the sensitivity of SrB6010：Tb phosphor. TL response depends on Tb concentration and 0.02 is the optimum in the concentration range from 0.01 to 0.10. Using the optimum Tb concentration, we calculated the kinetic parameters of SrB6010：Tb employing the peak shape method, and suggested the phosphor obeying the second order kinetics. TL emission intensity is linearly dependent on the irradiation dose within the dose range of 50 - 200 Gy. The characteristic Tb^3＋ ion emission was observed in TL emission spectrum.     

多功能光纤二次套塑线设计

在研制偏置牵引法控制光纤余长的基本型光纤二次套塑线的基础上，增添设备内容，扩展功能，设计出能满足多种产品科研实验及小批量生产需要的多功能光纤二次套塑生产线， 根据产品所需，将诸多设备内容方便灵活地组合成多种产品批量生产专用的二次套塑生产线。     

改善ZnO压敏元件温度特性的研究

从实验上探索了降低ＺｎＯ压敏陶瓷元件泄漏电流温度系数的途径和方法，研制了特殊添加物，在通常的ＺｎＯ压敏瓷料中添加适量特殊添加物，可以改变ＺｎＯ压敏陶瓷泄漏电流的温度特性，达到降低泄漏电流温度系数的目的。泄漏电流随温度变化在３１～３４°Ｃ出现极大值可能是杂质离子对电子的散射作用所致。     

Using a measuring fuel assembly in the local thermal regulation system of an IRT reactor

Translated from Atomnaya Énergiya, Vol. 70, No. 5, pp. 347–349, May, 1991.