摩擦热-机械碎岩钻进技术试验研究

摩擦热－机械碎岩钻进技术是利用钻头与岩石产生的摩擦热能加入弱化岩石，然后利用钻头上的切削元件切削碎岩。由于大部分岩石在高温和交变热应力作用下其强度、硬度以及磨蚀性都大幅度降低，因此提高了钻进效率。钻头摩擦元件采用了新型的耐摩擦耐高温的赛隆陶瓷材料，耐磨性是YG6硬质合金的3~5倍，而价格仅为硬质合金的1/10；对钻具和钻头的结构也进行了详细的论述；钻进试验表明：热机碎岩钻具摩擦元件能产生足够高的温度场(大于600 ℃)；热机碎岩钻进技术是切实可行的，能提高钻进效率，降低钻进成本。     

临朐县非金属矿产资源利用现状及发展方向

临朐县非金属矿产资源十分丰富。截至目前,已发现石灰岩、白云岩、玄武岩、花岗岩、大理石、玻璃陶瓷配套原料(包括脉石英、钾长石、钠长石、方解石)、白垩土、硅藻土、膨润土、耐火粘土、建筑砂砾、蛭石、观赏石(包括红丝砚石、紫金石、五彩石、风景石)等矿产20余种。目前主要     

Seismic health monitoring of RC frame structures using smart aggregates

Structural health monitoring of RC structures under seismic loads has recently attracted much attention in the earthquake engineering research community. In this study, a piezoceramic-based device called "smart aggregate" was used for the health monitoring of RC frame structures under earthquake excitations. Three RC moment frames instrumented with smart aggregates were tested using a shaketable with different ground excitation intensities. Distributed piezoceramic- based smart aggregates were embedded in the RC structures and used to monitor their health condition during the tests. The sensitivity and effectiveness of the proposed piezoceramic-based approach were investigated and evaluated by analyzing the measured responses. The displacement ductility demand of the structural members was calculated and compared with the damage index determined from the health monitoring system. The comparison shows that the damage index is compatible with the calculated ductility demand.     

失物招领旧物新知

北京,国子监街,"失物招领".认识它,是潜滋暗长的缘分逐年叠加. 最开始,当然是因为国子监街.这是一条古迹街,东西走向,紧贴北二环.东端与雍和宫大街相交,街口的斜对面就是香火旺盛的雍和宫;西端与安定门内大街相汇,安定门旧址和地坛公园近在咫尺.古街号"国子监",名副其实的因为元、明、清之际的最高学府——国子监就坐落在这里,一墙之隔,则是皇家祭祀儒家先师孔子的场所一北京孔庙.     

一种微型化铷原子钟

报道了一种微型化铷原子钟,它采用一种新型陶瓷填充微波腔来减小物理部分体积,其铷光谱灯采用升压电路以实现快速点亮,整机电子线路采用低电压技术,在国内首次对这类铷钟实现12V直流供电,并且首次对这类铷钟加入与外秒同步的功能。该铷原子钟体积为190mL,开机3min后可实现锁定,锁定后频率稳定度为1．5×10^-11／√τ（τ：1～1000s）,稳态功耗为5．5W。     

莫来石的工艺矿物学特性及其应用

莫来石作为一种人造矿物广泛出现于日用陶瓷、工业耐火材料及一些工业灰渣中。近代莫来石结构陶瓷和功能陶瓷的研究与应用，进一步扩展了应用领域，并促进了理论莫来石矿物学的发展。本文试图对莫来石矿物学的研究与应用作一系统的概述。     

G-856质子磁力仪恒温系统的研制及应用

本文介绍了G-856质子磁力仪恒温系统的结构、特点、功能及其在野外工作中的应用效果。     

堇青石的矿物学特征及其应用

堇青石作为一种天然矿物已被研究多年，它广泛分布于岩浆岩、变质岩和伟晶岩中，但确很少富集成矿。基于堇青石所具有的许多优良性能，使它在耐火材料、精细陶瓷、计算机集成电路的基片等领域中得到了广泛的应用。本文将从堇青石的矿物学角度出发，阐述人工合成堇青石的研究现状及发展前景。     

Preparation of Biomorphic SiC/C Ceramics from Pine Wood via Supercritical Ethanol Infiltration

Biomorphic （wood derived） carbide ceramics with an overall composition in the SiC/C was produced by supereritical ethanol infiltration of low viscosity tetraethylorthosilicate/supercritical ethanol into biologically derived carbon templates （CB-templates） and in situ hydrolysis into Si（OH）4-gel, the Si（OH）4-gel was calcined at 1400℃ to promote the polycondensation of Si（OH）4-gel into SiO2-phase and then carbonthermal reduction of the SiO2 with the biocarbon template into highly porous, biomorphic SiC/C ceramics. The phases and morphology conversion mechanism of resulting porous SiC/C ceramics have been investigated by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, transmission electron microscopy （TEM）, and Fourier transform infrared spectroscopy （FT-IR）. Experimental results showed that the biomorphic cellular morphology of pinewood charcoal was remained in the porous SiC/C ceramic with high precision that consisted of β-SiC with minority of α-SiC and the remain free carbon existed in amorphous phase.     

陶瓷墙地砖坯用煤矸石原料工业要求初探

本文根据笔者多年来的实践经验，并以利用磁县观台六河沟二叠统山西组２号煤煤矸石试制外墙砖为实例，提出了陶瓷墙地砖坯用煤矸石原料的工业要求，从而为墙地砖用煤矸石的开发指明了方向。