纳米粉及添加剂对压电陶瓷材料性能的影响

采用高能球磨法研磨出PZT-5纳米粉料，添加外购的纳米有机添加剂，按照传统的固相工艺法制备出了压电陶瓷材料，研究分析纳米粉料和纳米有机添加剂对压电陶瓷性能的影响。通过测试分析可以看出，纳米压电粉料与纳米有机添加剂的综合作用，降低了材料的烧结温度、相对介电常数εr,Qm值和以d31，提高了压电应变常数d333，从而压电电压常数g33、gh、dh成倍提高，这些对制作宽带、高灵敏度的换能器是很有好处的。     

爆炸压实烧结ITO陶瓷靶材的实验研究

通过爆炸压实烧结纳米ITO粉末制备了ITO陶瓷靶材，结果表明爆炸冲击压实在靶材的后续烧结密实过程中起到了促进作用，它与常规的加压烧结相比，具有操作简单，设备要求低等很多优点。经过爆炸压实的烧结靶材具有细小的晶体颗粒，比商业靶材的晶粒度小约1个数量级。     

陶瓷与金属特种焊接技术的开发与应用

介绍了近年来发展的陶瓷与金属的焊接技术，并对其焊接工艺特点及应用情况进行了分析与总结。     

Wear resistance of ceramic coating on AZ91 magnesium alloy by micro-arc oxidation

The ceramic coating formed on AZ91 magnesium alloy by micro-arc oxidation （MAO） was characterized. The results show that the ceramic coating （3.4-23 μm in thickness）on the surface ofAZ91 alloy was attained under different micro-arc oxidation treatment conditions, which consist mainly of MgO, Mg2SiO4 and MgSiO3 phases. Nano-hardness in a cross-sectional specimen was determined by nano-indentation experiment. The MAO coatings exhibit higher hardness than the substrate. Dry sliding wear tests for the MAO coatings and AZ91 alloy were also carded out using an oscillating friction and wear tester in a ball-on-disc contact configuration. The wear resistance of the MAO coatings is improved respectively under different treatment time as a result of different structures of ceramic coatings formed on AZ91 alloy.     

EPS模陶瓷型精密铸造失模工艺研究

针对EPS陶瓷壳型精铸失模时容易裂壳的现象,对EPS消失模精密铸造工艺进行了研究。利用自制的膨胀率检测设备对不同密度的EPS模试样在不同加热温度下的最大膨胀率进行了测试,研究了壳型膨胀与失模温度之间的关系;对陶瓷壳型中EPS模失模时的温度场分布进行测量,发现EPS模试样的密度大小对失模时温度场有着很重要的影响。在试验和分析的基础上,对EPS模失模机制进行了探讨,提出了高温失模机制。高温失模有利于降低失模时对壳型的膨胀作用力,为获得洁净而健全的陶瓷型壳提供了可靠保证。     

Na2SiO3—KOH—（NaPO3）6溶液中Ti6Al4V微弧氧化陶瓷膜研究

用非平衡交流微弧氧化法于Na2SiO3-KOH-(NaPO3)6溶液中在Ti6Al4V表面形成氧化物陶瓷膜。分别用扫描电镜、电子探针及X射线衍射研究了陶瓷膜的组织形貌、元素分布和相组成。相对致密均匀的膜层主要由TiO2(钙钛矿相及金红石相)及非晶相组成。厚约20μm的膜可分为3层：过渡层、致密层与疏松层。电解液所含元素Si，P进入到膜层中，表明电解液组元急烈参与微弧氧化反应，这为通过选择电解液来设计膜层的相组成进而对膜层进一步改性提供途径。     

2001世界陶瓷原料市场分析与预测

近几年陶瓷原料工业呈稳步发展 ,反映了陶瓷工业强大的发展势头。 1 999年度大多数陶瓷原料的生产和销售都有所增长 ,预示着未来陶瓷原料工业的成功。以下是几种在陶瓷工业领域应用较广泛的陶瓷原料的生产与消费情况。通过对这几种陶瓷原料生产和消费情况的分析 ,对未来陶瓷原料市场做出了预测 ,旨在给各陶瓷企业的生产提供一定的参考     

有减水作用的新型高效陶瓷助磨剂研制

利用曼尼奇反应原理 ,制备了多胺基磷酸钠陶瓷助磨剂 ,采用红外光谱、差热分析等对合成的助剂进行了表征 ;此外 ,通过对氧化铁以及石英滑石等原料的助磨应用测试表明 :合成的助剂是一种高效陶瓷助磨剂 ,同时还具有减水作用。     

Mechanical Properties and Oxidation Behavior of Al2O3–AlN–TiN Composites

The study examines the effect which the composition of hot-pressed electroconductive ceramics has on their structure, mechanical properties, and oxidation behavior, for ceramics of the type AIN–Al₂O₃–42 wt% TiN, differing in the AIN/Al₂O₃ ratio. The results are physico-mechanical property data, including density, hardness, strength, fracture toughness, and wear resistance. A correlation was found between the wear resistance and fracture toughness. The analysis of oxidation products revealed the formation of α-Al₂O₃ and rutile in the temperature range from 600° to 1100°C and aluminum titanate above 1200°C. The spallation of the oxide layer caused low oxidation resistance of Al₂O₃-rich composites above 1250°C. The oxidation of composites was compared with the oxidation of pure TiN. The relationship is discussed between material properties, composition, phases, and processing parameters.