聚丙烯纤维及废弃陶瓷对低品级菱镁矿制氯氧镁水泥性能的影响

本文以聚丙烯纤维、普通废弃陶瓷、工业氯化镁以及含39.12％活性氧化镁的低品级轻烧氧化镁制成了一种镁水泥基建筑墙体材料.采用正交试验确定了最佳配合比,并对聚丙烯纤维、废弃陶瓷复合增强剂对镁水泥干缩性能的影响进行了探讨.研究结果表明,纤维及陶瓷对镁水泥分别起到了增韧增强及骨架作用.其制品28 d干缩率仅为0.03％.     

Carbon Dioxide Sensor Mechanism of Porous Hydroxyapatite Ceramics

Hydroxyapatite and Cl⁻ -containing hydroxyapatite powders are prepared and characterized. Reversible substitution of CO^2-₃ for OH⁻ at the surface is presumed to be responsible for the sensor function. The role of Cl⁻, which is necessary to realize the sensor function and is incorporated during soaking treatment, is considered as follows. It may reduce the strain caused by the incorporation of CO^2-₃ (which is larger than OH⁻), and, hence, promote the reversible substitution reaction. This behavior is presumed because Cl⁻ -containing hydroxyapatite samples exhibit sensor characteristics typical of CO₂ without any treatment.     

Combustion Wave Propagation of a Modular Porous Burner with Annular Heat Recirculation

A numerical investigation of the different arrangements of porous media in a combustor with annular heat recirculation is conducted.The effect of annular heat recirculation and porous block arrangement on the characteristics of combustion wave propagation is numerically studied.Results show that power input,heat capacity of porous matrix,arrangement of porous blocks,and annular heat recirculation are major factors that influence the propagation of combustion wave.The overall temperature of ceramic porous burner is higher than that of ceramic-metal type burner due to the lower heat storage capacity of the former,especially for the temperature downstream.The flame temperature is higher upstream and lower downstream with metal foams in the annulus than that without metal foams.The flame temperature of uniformity type burner is more uniform than that of gradually-varied and modular type burners.The flame front moves more slowly with metal foams in the annulus than that without metal foams due to the better preheating effect of metal foams.The flame position moves downstream,and the flame temperature gradually decreases and is eventually extinguished due to the low preheating temperature.     

影响唐宋瓷质碗类样式的几点因素

从成型工艺、烧成工艺以及模仿金银器皿等三个方面论述了中国陶瓷器皿中的碗类样式随工艺技术的发展而发生的变化，其变化的过程反映了各个朝代的陶瓷工艺和技术的成就。     

陶瓷成形加工技术新进展

陶瓷材料以其优异的耐高温、高强度、耐磨损、耐腐蚀等性能被广泛应用在各个领域中.本文介绍了几种主要的陶瓷成形加工技术的特点和进展.     

影响检测实验室结果质量的要素和解决措施

分析并运用检测实验室能力通用要求和资质认定准则相关规定,提炼出影响检测结果质量的主要要素,提出了确保检测结果质量的有效措施,旨在指导实验室更科学有效地开展检测结果质量的保证工作。     

Yb3+掺杂YAG微晶玻璃的制备与晶化性能研究

通过对CaO-Al2O3-SiO2三元相图相关点的探讨,确定Yb3+掺杂的29.5SiO2-30.5CaO-24 Al2O3-12Y2O3-4 Yb2O3-(0～3)ZrO2玻璃系统,采取高温熔融获得母体玻璃。用DTA和梯温法测定母体玻璃的析晶行为并确定热处理制度。采取XRD,TEM分析热处理后的样品。结果表明,选择的玻璃成分均可得到Yb3+掺杂YAG透明微晶玻璃,含3 mol%ZrO2更有利于得到晶体颗粒的形貌和大小基本一致、分散均匀、尺寸约33 nm的Yb3+掺杂YAG透明微晶玻璃。     

高温除尘用纤维多孔陶瓷材料的制备及性能

利用陶瓷纤维直径不同的特点,采用一步成形的方法制备具有梯度结构的纤维多孔陶瓷。采用扫描电镜(SEM)和金相显微镜对纤维多孔陶瓷的显微结构进行表征,并对影响材料性能的各种因素进行分析。结果表明:800℃烧成样品的抗折强度为6.7 MPa,气孔率最大达到76%,室温下空气流速为1 m/min时的过滤阻力为98 Pa,过滤阻力随着烧成温度的上升而逐渐下降。     

重结晶碳化硅烧成中碳化硅的分解现象、热力学条件及对蒸发凝聚的影响

重结晶碳化硅陶瓷烧成试验采用国内碳化硅微粉,对其烧成后的现象与结果进行分析检测,在热力学分析和试验的基础上得出含有较多杂质的国内碳化硅微粉在重结晶烧成中有显著分解挥发,而且影响碳化硅的蒸发凝聚过程。     

构建陶瓷低碳经济评价体系的探索研究

陶瓷产业发展低碳经济已经成为社会的必然选择,而构建陶瓷低碳经济评价体系是有效开展陶瓷低碳认证和评估的前提工作,但目前陶瓷市场还缺乏一个具有说服力的陶瓷低碳经济的评价或鉴定标准。为此,本文通过近两年的实地调查和理论研究,针对当前形势,结合行业实际,参考有关国家政策、法规和地方条例,初步构建了陶瓷产业低碳经济评价体系框架,作为一种研究成果可为政府部门制定统一的陶瓷行业低碳经济评价和考核标准提供参考。