氧化锆增韧氧化铝耐磨陶瓷部件的研究

耐磨结构陶瓷部件是高技术陶瓷材料应用的一个主要领域,传统的耐磨陶瓷部件多以氧化铝材料为主。本文对以工业级原料为主制得的氧化锆增韧氧化铝陶瓷耐磨部件进行了研究,用该技术制得的耐磨陶瓷部件具有产品性能好、生产成本低等特点,并能满足工业化生产要求。     

利用硅酸铝原料和工业废料生产陶瓷隔热保温材料

以硅酸铝为原料,加入可燃物作造孔剂,在对成型制品烧成时这些可燃物被烧掉,从而制成了多孔隔热保温材料.本文对这一工艺过程进行了研究,并探讨了所制成材料的吸水率、显气孔率、体积密度、热导率、线性热膨胀系数、机械强度与烧成温度以及加入可燃物的种类和加入量的关系.     

氧化铝耐磨陶瓷在电厂、水泥厂的应用

介绍了95%氧化铝耐磨陶瓷衬板的主要性能特点,同时还介绍了它在燃煤电厂、水泥厂等的输料系统、输煤系统、制粉系统和灰渣系统等系统中的应用。     

高铝瓷的可塑成形

本文研究了全瘠性料高铝瓷的可塑成形。通过坯料可塑性和干燥性能的测定,对有机粘结剂进行了筛选。复合有机添加剂可以赋予高铝瓷坯足够的塑性和干燥强度。因为有机添加物的灰份接近于零,用它们增塑时,不会影响高铝瓷烧结后的结构与性质。     

添加剂对高铝瓷耐磨性能的影响

根据大量文献，从影响高铝瓷耐磨性诸因素出发，系统讨论了添加剂对高铝瓷耐磨性的作用，指出高铝瓷耐磨性研究中几个值得注意的研究方向。     

锆铝耐磨陶瓷研磨体在水泥粉磨中不减产的应用探索

陶瓷研磨体在水泥磨的应用过程中必须要解决两个问题:破碎和降产.锆铝耐磨陶瓷研磨体很好地解决了破碎问题,再通过在生产实践中不断探索,有针对性地解决了陶瓷研磨体置换高铬钢球/段不降产的应用难题,以其具有的节能降耗、提质增效、降温减噪、耐磨抗碎、绿色环保、故障率低等优势,逐渐成为球磨机用研磨介质的主角.     

氧化锆、氧化铝陶瓷的耐腐蚀性能

综述氧化铝、氧化锆陶瓷在高温、酸、碱、蒸汽等环境下的耐腐蚀特性，以及耐磨蚀和疲劳腐蚀的性能。     

降低高铝瓷烧成温度的研究

从我国能源战略的高度和高铝瓷产业生存、发展的角度,阐述论证了低温烧成的必要性和重要性.基于高铝瓷烧结的内在规律和固有特点,指出低温烧结对高铝瓷性能有改善作用,提出了几种降低高铝瓷烧成温度的可行技术方案.     

Boron mining and enrichment waste: A promising raw material for porcelain tile production

Boron mining and enrichment waste (BW) from boric acid (H₃BO₃) production is a by-product of the boron industry. BW exhibits B₂O₃ contents of 16-31 wt%, and therefore, could be used to effectively lower the sintering temperature of ceramics without increasing their thermal expansion coefficient. Herein, we introduced 3-10 wt% of BW to a formulation used for commercial porcelain tile production, and achieved a sintering temperature decrease of 38°C (to 1195°C). The resulting porcelain tiles exhibited a strength of 44.80 MPa and water absorption percentage of 0.01%, and therefore, met TS ISO EN 10545 requirements. Thus, this study paves the way for the use and valorization of BW in the production of porcelain tiles and could inspire the search for other opportunities to utilize BW in ceramic production.     

Lithium-containing material intended for production of domestic porcelain

Translated from Steklo i Keramika, No. 10, pp. 27–28, October, 1988.     

Phase composition,microstructure, and properties of ceramic tile prepared using ceramic polishing waste as raw material

Polished ceramic products are currently the most popular in architectural decoration, but a significant amount of ceramic polishing waste (CPW) is produced during the preparation process. Determining how to handle the CPW is a pressing task for enterprises. This work investigated the feasibility of recycling CPW in porcelain tile, and its influence on the phase composition, microstructure, and properties of the ceramic body. The CPW was found to have a similar composition to the traditional ceramics and worked as a flux. The SiC within CPW began to decompose into SiO₂ with CO₂ generation at about 1100°C, resulting in a porous structure. Microstructure observation indicated that a high CPW sample produced sufficient liquid phase when fired at temperatures ≤1100°C, which was not only beneficial for mullite growth but also for matrix densification by the viscous flow mechanism. But a high-content CPW caused the body to foam or even expand at temperatures >1100°C, thus significantly reducing mechanical properties. Finally, a series of porcelain tiles were successfully prepared with a CPW content of ≤30 wt% at a firing temperature of 1125-1200°C. The results of this study are considered to be valuable for the utilization of CPW.     

Effect of waste glass and zircon on ceramic properties and microstructure of porcelain tiles

Abstract

The possibility of using waste glass as a flux in porcelain tiles without deterioration in mechanical properties has been assessed. Waste glass was added to a typical porcelain tile body, replacing feldspar by up to 15%. Zircon was also added at 5% in partial replacement of quartz. The prepared batches were fired at temperatures of 1160 to 1240°C with 20 min soaking time. Addition of 5% zircon in the presence of 5% waste glass resulted in unusual mechanical and physical characteristics. Further additions of waste glass enhanced vitrification and consequently some surface and mechanical properties, but worsened modulus of rupture (MOR) and toughness. Generally specimens containing zircon had better physicomechanical properties.     

用粉煤灰和废酸生产聚合氯化铝的研究

介绍了用粉煤灰和废酸生产高效混凝剂聚合氯化铝的技术,不但可以消除粉煤灰和废酸污染,还可以生产质量优良的高效净水剂聚合氯化铝,既实现了废物综合利用,又保护了环境、消除粉煤灰扰民问题,同时又创造了经济价值,实现了环境效益、社会效益、经济效益三者的统一。     

Evaluation of aluminum dross waste as raw material for refractories

An aluminum dross waste from plasma processing for Al metal reclamation was tested as a replacement raw material in refractories. The main phases of the starting Al dross waste material were MgAl₂O₄ and AlN. The waste was tested to replace calcined alumina in castables and refractory clay in a molded refractory at levels below 6.5%. The results of physical and mechanical tests indicated that the waste may be applied directly, without prior calcination, as a substitute for fine structural components in refractories. The waste and water contents used in processing, however, must be optimized to avoid the formation of crack-like defects in the microstructure. The origin of these defects is related to the generation of gas from the waste at high temperatures. It is not known if these crack defects impact physical properties. The waste was also tested as a replacement for anti-oxidant elements (Al and Si powders) in a resin-bonded refractory. Oxidation tests, however, indicated a negative effect on oxidation resistance.     

Compressive strength and microstructure of alkali-activated mortars with high ceramic waste content

The present work investigated alkali-activated mortars with high ceramic waste contents. Tile ceramic waste (TCW) was used as both a recycled aggregate (TCWA) and a precursor (TCWP) to obtain a binding matrix by the alkali-activation process. Mortars with natural siliceous (quartz) and calcareous (limestone) aggregates, and with other ceramic waste materials (red clay brick RCB and ceramic sanitaryware CSW waste), were also prepared for comparison purposes. Given the lower density and higher water absorption values of the ceramic aggregates, compared to the natural ones, it was necessary to adapt the preparation process of the recycled mortars by presaturating the aggregate with water before mixing with the TCWP alkali-activated paste. Aggregate type considerably determined the mechanical behaviour of the samples cured at 65 °C for 3 days. The mortars prepared with the siliceous aggregate presented poor mechanical properties, even when cured at 65 °C. The behaviour of the limestone aggregate mortars depended heavily on the applied curing temperature and, although they presented the best mechanical properties of all those cured at room temperature, their compressive strength reached a maximum when cured at 65 °C, and then decreased. The mechanical properties of the mortars prepared with TCWA progressively increased with curing time (53 MPa at 65 °C for 28 days). An optimum 50 wt% proportion was observed for the limestone/TCWA mortars (≈43 MPa, 3 days at 65 °C), whereas the mechanical properties of that prepared with siliceous particles (10 MPa) progressively increased with the TCWA content, up to 100 wt% substitution (23 MPa). Limestone particles interacted with the binding matrix, and played an interesting beneficial role at the 20 °C curing temperature, with a slight reduction when cured long term (28 days) at 65 °C. The results demonstrated a potential added value for these ceramic waste materials.     

高压烧结AlN陶瓷体材料的微观结构分析

用国产六面顶压机在5．0GPa、1200℃～1700℃条件下实现了以稀土氧化物为助剂的AIN陶瓷体的高压烧结。对制备的AIN高压烧结体进行了高压热处理。用SEM对AIN高压烧结体的微观结构进行了表征。研究表明：高压制备陶瓷体材料能够有效降低烧结温度和缩短烧结时间，烧结温度最低温度达到1200℃，可比传统烧结方法降低400℃以上。在5．0GPa／1400℃／50min条件下制备的AIN高压烧结体出现穿晶断裂模式。高压热处理使得晶粒明显长大，形成了等轴晶粒组织。