Precipitous weakening of quartz at the α–β phase inversion

Crystalline quartz has long been identified as among the weakest of abundant crustal minerals. This weakness is particularly evident around the α–β phase inversion at 573°C, in which Si–O bonds undergo a displacive structural transformation from trigonal to hexagonal symmetry. Here we present data using indentation testing methodologies that highlight the precipitous extent of the transformational weakening. Although the indentations are localized over relatively small specimen contact areas, the data quantify the essential deformation and fracture properties of quartz in a predominantly (but not exclusively) compressive stress field, at temperatures and pressures pertinent to conditions in the earth's crust.     

内蒙古大青山麻粒岩相糜棱岩石英的变形行为

在内蒙古大青山地区发育一套高温区域变质岩──麻粒岩，在这高温变质岩内有一系列的糜棱岩带．通过对糜棱岩带中石英的研究，对比深部地壳与浅部地壳石英的变形特点，获得一些新的认识．对石英显微构造、动态重结晶、TEM研究及石英岩组学方面进行了研究，发现石英的塑性变形显著，以缎带石英产出，发育各种塑性变形的显微构造，变形带、波状消光和亚颗粒显著：TEM观察到石英中有直线状的位错．岩组学研究显示出石英高温变形和多期构造叠加的特点．     

F级高云母含量云母带的研制及应用

本文介绍了一种F级高云母含量云母带，它的主要特点是云母含量高达48％以上，具有良好的长时间耐电热老化性能，适用于高压电机主绝缘多胶模压工艺要求，该云母带的应用对提高电机绝缘水平和延长电机使用寿命具有重要意义。     

谐振式力传感器敏感结构的研究

利用材料力学及弹性力学法，对石英晶体谐振式力传感器的悬臂梁结构进行了研究，得出了双梁单岛及三梁单岛悬臂梁结构的力转移系数，在与实验结果进行了比较后证明，支承结构的理论推导与实验结果一致。     

VPI粉云母带的选型试验研究

为电机主绝缘VPI工艺选择合适的粉云母带，对几种真空压力浸渍(VPI)用云母带进行了试验研究，分析了选型原则，同时对比了几种粉云母带的性能。将它们应用于模拟线棒中，线棒的试验数据表明：选出的两种云母带的配合可获得优异的性能，达到优等品标准水平。再将少胶云母带应用于电机整机试验，试验结果表明达到了减薄绝缘、降低温升、延缓绝缘老化、提高电机使用寿命的目的。     

石英砂物料气流冲击粉碎效果影响因素分析

通过对石英砂物料在不同实验条件下的粉碎结果分析，论述了流化床式超细气流粉碎机工艺参数对产品粒度的影响。     

Hydrogen incorporation in Ni–P films prepared by electroless deposition

Electroless NiP films, with 12 to 16 wt % P, were deposited from a moderately acid solution. Thermogravimetric analysis indicates the presence of occluded hydrogen in the layers, which desorbs upon heating. The amount of incorporated hydrogen decreases when the pH of the solution or the nickel sulfate concentration is increased; by contrast it increases with hypophosphite concentration. Cyclic voltammetry, using an electrochemical quartz crystal microbalance, confirms the existence of parasitic reactions, namely the reduction of protons of the solvent during the cathodic process and oxidation of hydrogen during the dissolution of the layers. This behaviour is in qualitative agreement with the proposed reaction scheme.     

石英晶体监控法镀制高精度光学薄膜

讨论了石英晶体监控法在光学薄膜镀制过程中的应用原理。通过与常规的光学监控法镀制的膜层相比较．证实了石英晶体监控法有助于提高光学薄膜的光学品质。试验表明所镀膜层的光学性能优异，在光通信和激光器等领域具有广阔的应用前景。     

石英砂脱水性能的研究

通过大量试验结果 ,研究了各种粒度范围的石英砂的脱水性能 ,包括沉降特性、过滤性能、极限压缩浓度等 ,为进行此类产品的固液分离提供了重要的参考数据