络合沉淀法制备BaTiO_3超细粉末

在分析ＢａＴｉＯ_３前驱体形成机理的基础上，提出了以草酸作为络合剂，用络合沉淀法制备超细ＢａＴｉＯ_３新工艺。用化学分析法测定产物Ｂａ／Ｔｉ比，用ＸＲＤ、ＴＥＭ、ＢＩ－９０激光散射粒度仪对产物的晶型、粒度及形貌进行表征。结果表明：采用该法合成的前驱体，微观组分确定，粒径小，粒度分布窄，近似球形，煅烧后为高纯超细ＢａＴｉＯ_３粉末。     

现代民间青花与现代陶艺

现代民间青花与现代陶艺都是火与土的艺术，都具有粗犷，质朴、自然、大方的共同艺术特点。前者在传统民间青花的基础上，汲取了现代陶瓷科技成就和现代文化艺术成果，而发展成为富有现代艺术意蕴和现代审判内涵的新型民间青花艺术；而后者则是从传统陶艺延伸、扩展、蜕变为纯粹艺术表达和具有独特审判内涵的一门现代艺术。     

石英玻璃结构调整和二阶非线性光学效应产生机制的理论研究

从非谐振动理论观点出发．考虑到玻璃在外场及加热条件下结构取向调整和弛豫，对外部静电场和加热的温度及加热时间对其信频光产生的影响进行了探讨性理论研究，结果较好地解释了有关实验现象。     

驱动压电陶瓷的高压放大器

概述了高压放大器的基本组成，以及采用高压稳压电源措施，提高高压放大器的性能，并简述了高压放大器输出级的工作原理，给出了过渡保护方法。     

A simple modification to the LKB 7800 series Knifemaker and a balanced-break method to prepare glass knives for cryosectioning

A novel method of using the LKB 7800 series Knifemaker to produce glass knives using a balanced break is described. The method produces knives of sufficient quality to section aldehyde-fixed, sucrose-cryoprotected, frozen biological material in a cooled cryochamber of an ultramicrotome. The modifications to the Knifemaker are minimal and, if required, the machine can be returned easily to its normal state after use.     

Entropy,Free Volume,and Cooperative Relaxation

The high frequency end of the relaxation spectrum for polymer molecules involves the rotation of the segmental bonds. This fast relaxation process, however, cannot take place easily in the condensed state crowded by the densely packed conformers, necessitating the slower cooperatively synchronous relaxation. As the temperature is lowered, the domain of cooperativity grows towards the infinite size at the Kauzmann zero entropy temperature, though actually the system deviates from the equilibrium as the glass transition intervenes typically at 50 K above that temperature. The excess enthalpy and entropy drop faster than predicted by the rotational isomeric states which would reach zero only at 0 K. The real ΔC_P is greater than that of the RIS value. The actual volume in excess of the crystalline lattice volume, however, points towards zero at 0 K. Thus, a polymer with higher T_g typically exhibits a lower density and modulus in the glassy state. Since the configurational entropy associated with the free volume is proportional to the logarithm of the latter, the Kauzmann temperature can be scaled by ln M, where M is the algebraic average of the conformer molecular weight. The temperature dependence of the most dominant, i.e., the largest equilibrium domain size will result in the Adam-Gibbs and Vogel equations for the characteristic relaxation time. The cooperative domain distribution leads to the relaxation spectrum that follows a power law. The relationship between the characteristic relaxation time and the rate of physical aging is derived.     

彩色PDP用玻璃基板

本文讨论了彩色ＰＤＰ现用钠钙玻璃的热稳定性，指出由于这种玻璃在热处理过程中易变形和收缩，因而不适合作大面积彩色ＰＤＰ基板材料，介绍了彩色ＰＤＰ基板玻璃的制造方法和特点。最后介绍了日本旭硝子公司和美国康宁公司各自为彩色ＰＤＰ新开发的玻璃基板材料ＰＤ２００和ＣＳ２５。     

磷酸盐激光玻璃中铂颗粒密度与氧化还原平衡关系的研究

用吸收光谱法研究了Ｒ２Ｏ—ＢａＯ—Ｐ２Ｏ５系统磷酸盐激光玻璃中铂颗粒密度与铭的氧化还原平衡的关系。结果表明，玻璃中铂颗粒密度随平衡向右移动而减小；玻璃中平衡随熔炼气氛中氧分压增大、熔炼温度升高而向右移动，当足够大时，铂颗粒不能形成。     

Reticulated Porous Multiphase Ceramics with Improved Compressive Strength and Fracture Toughness

A multiphase reticulated porous ceramic (RPC) as Si₃N₄–Al₂O₃–SiO₂ was fabricated by replication techniques. Proper volumes of additives and twice sinter- twice immerse process endow the RPC an excellent crack healing and submerging property. The compressive strength and fracture toughness improved owing to the crack bridging behavior. The existence of pores in struts in RPC blunt the crack tip and increased the external force needed to propagate the crack. The mechanisms play a beneficial role in enhancing the compressive strength and fracture strength. Si₃N₄ RPC with additives of 5%Al and 5% Al₂O₃ yielded the compressive strength of 9.8 MPa and fracture toughness of 0.3 MPa m^1/2.     

ISOFLUX膜——微滤膜极品

介绍一种新型的恒通量的微滤膜———ISOFLUX 膜 ,该种膜的膜通量衰减比通常的微滤膜要小得多 ,对ISOFLUX 膜的原理和数学模型进行了推导 ,并给出了对牛奶进行冷杀菌过滤的结果 .