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氧化锆氧分析仪测量烟气中的氧含量,是控制炉窑经济燃烧不可缺少的重要在线分析仪,它有3个作用,节能、减少环境污染和延长炉龄。针对氧化锆在装置中出现的问题,对氧化锆进行技术改造,降低氧化锆的故障率,使氧化锆维护更加方便,并延长氧化锆的使用寿命。 相似文献
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低温型氧化锆氧传感器的研制 总被引:1,自引:0,他引:1
用氢氟酸和硫酸混合溶液对氧化锆元件进行表面自理可以增加氧化锆电池电极表面积,从而增强电极材料与电解质表面分子用力,使氧化锆电池的工作温度通常的700-800℃降至500℃以下。 相似文献
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介绍了氧化锆氧传感器的基本原理和燃煤工业锅炉送风控制系统,指出将氧化锆氧传感器和计算机技术应用到工业锅炉中,是减少燃煤工业锅炉的排放污染和降低运行成本最有效的办法。 相似文献
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针对传统活塞式气泵采用的金属材料耐磨性差、易产生冷焊现象等问题,研究氧化锆陶瓷和304不锈钢作为活塞式气泵材料的可行性。利用ANSYS模拟氧化锆陶瓷和304不锈钢材料作为泵体材料与活塞环接触应力的变化,通过实验研究氧化锆陶瓷和304不锈钢材料与活塞环对摩时的摩擦磨损性能。结果表明:采用307不锈钢和氧化锆陶瓷作为气泵泵体材料,活塞环与套筒的应力并不会显著增加;氧化锆陶瓷性能优异,作为泵体材料不会出现破坏以及变形等;氧化锆陶瓷的抗磨性能明显好于不锈钢,同时其具有自润滑的特点,可减少摩擦磨损。以陶瓷为气泵泵体材料,加工制作实验样机并进行验证。结果表明,采用氧化锆陶瓷作为气泵泵体材料在工程上是可行的。 相似文献
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《润滑与密封》2017,(3)
针对传统活塞式气泵采用的金属材料耐磨性差、易产生冷焊现象等问题,研究氧化锆陶瓷和304不锈钢作为活塞式气泵材料的可行性。利用ANSYS模拟氧化锆陶瓷和304不锈钢材料作为泵体材料与活塞环接触应力的变化,通过实验研究氧化锆陶瓷和304不锈钢材料与活塞环对摩时的摩擦磨损性能。结果表明:采用307不锈钢和氧化锆陶瓷作为气泵泵体材料,活塞环与套筒的应力并不会显著增加;氧化锆陶瓷性能优异,作为泵体材料不会出现破坏以及变形等;氧化锆陶瓷的抗磨性能明显好于不锈钢,同时其具有自润滑的特点,可减少摩擦磨损。以陶瓷为气泵泵体材料,加工制作实验样机并进行验证。结果表明,采用氧化锆陶瓷作为气泵泵体材料在工程上是可行的。 相似文献
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研究陶瓷材料在砂水泥浆中的浸蚀机理,为了研究陶瓷材料在开始时产生和扩展的表面波纹,在试验室内用砂水泥浆喷射浸蚀氧化铝,碳化硅,氮化铝-氧化铝-氧化硅陶瓷和氧化锆4种工程陶瓷材料进行试验。陶瓷材料浸蚀机理包括塑性变形,断裂两个过程。用光学显微镜和扫描电镜观察研究4种陶瓷材料表明用圆形的二氧化硅砂作浸蚀剂时,其主要的浸蚀机理是断裂,在碳化硅中断裂质点过移,而在氧化锆,氮化铝-氧化铝-氧化硅陶瓷和氧化铝中具有脆性断裂形式同时伴随着创削的延伸性形式。为了与脆性材料比较,还研究了典型延伸材料铝表面的微波形式。 相似文献
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二氧化锆(Y—TZP)以其高强度、高韧性、良好的生物相容性已成为口腔修复学领域的新亮点,介绍了其特性及用于齿科所必须的工艺及设备。 相似文献
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The object of this work was to evaluate the particulate erosion performance of Y-TZP (Yttria Tetragonal Zirconia Polycrystalline), used in the construction of artificial teeth, at various pH values, impact angles and exposure times. The results showed that the highest degradation recorded was in acidic environments. However, the incubation time to high wastage was also affected by impact angle and exposure time. Wear maps were constructed, based on the results, identifying wastage regimes for the material as a function of the exposure conditions. In addition, a wear map was generated based on the observed phase transformations for the material. 相似文献
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Lubricants are often used to improve the behaviour of ceramics for tribological applications. In this paper, the case of Zirconia, lubricated with different additive-containing lubricants, is described, to show the antiwear mechanisms during boundary lubrication of ceramics. It was found that the presence of a lubricant eliminates the surface degradation observed in dry friction (mainly transfers). The use of an ester-based lubricant is associated with a decrease in wear of the ceramic, while silicone-based lubricants lead to surface damage. With additives, the formation of an interfacial layer adherent to the ceramic is dependent upon the tribological behaviour of the base alone. If that layer is created, zirconia does not form part of its composition. 相似文献
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Zirconia ceramics have shown promising wear properties in a number of applications. However, in certain load configurations the wear performance is very poor. The reason for this is believed to be subsurface phase transformation. The surface uplift due to transformation of a circular inclusion in a half-plane and of a spherical inclusion in a half-space is analyzed. The general uniform transformation strain has significant effects on the surface topography and has ramifications for the rolling/sliding wear characteristics of the surface. The two-dimensional approximation overestimates the surface uplift by up to three times compared with the more realistic three-dimensional model. The results indicate that the occurrence of transformation strains, and in particular shear transformation strain, in the near surface area will affect the surface topography considerably. 相似文献
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Zirconia (ZrO2) is a highly biocompatible ceramic material providing fracture strength properties that allow application as dental implants in biomedical engineering. In this present research, experimental analysis has been made for generating stepped hole on zirconia bioceramics with desired quality using ultrasonic machining (USM) process. Four independent controllable input process parameters are abrasive grain diameter, power rating, concentration of abrasive slurry, and tool feed rate. Material removal rate (MRR), overcut of larger diameter (OLD) hole, and overcut of smaller diameter (OSD) hole of stepped hole are considered as the responses. Response surface methodology (RSM) is used for modeling the performance of USM process. Multiobjective optimization has been performed to maximize the MRR and minimize the OLD hole and OSD hole of stepped holes. All the responses are improved at the optimal parametric condition and verified by confirmation test. The present research opens up the application feasibility of USM process for stepped hole generation on bioceramics and its utilization in biomedical field. 相似文献
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氧化锆增韧氧化铝复相陶瓷(ZTA)/高铬铸铁(HCCI)构型耐磨复合材料具有极高的耐磨性,但由于铸造态复合材料难以加工且易断裂失效,需要对其进行热处理。对ZTA/HCCI构型复合材料进行热处理,分析淬火前后复合材料的微观组织,并通过三体摩擦磨损测试研究热处理对耐磨性的影响。结果表明:热处理后HCCI基体微观组织为马氏体或回火马氏体,保证了ZTA/HCCI构型复合材料基体本身具有较高的耐磨性;与热处理后的HCCI相比,淬火和回火的ZTA/HCCI复合材料的质量损失率分别降低了53%和55%,表明材料的整体耐磨性得到了提高。在热处理后的ZTA/HCCI构型复合材料中,ZTA陶瓷在HCCI马氏体基体上钉扎,起到了“阴影效应”,增强了材料的整体耐磨性。 相似文献