【作者】 高小琴；

【导师】 杜美利；

【作者基本信息】 西安科技大学 ， 材料学， 2005， 硕士

【摘要】 采用价格低廉的富金红石矿物原料,选择两种不同的工艺路线,制备出了具有高发射率的红外辐射陶瓷。工艺路线分别是:(A)用富金红石矿物单一原料在不同烧结温度和保温时间下进行常压烧结;(B)以富金红石矿物原料配以过渡金属氧化物 Fe2O3、MnO2、CuO 添加剂,考虑烧结温度、保温时间、添加剂含量三个影响因素,用正交试验法进行常压烧结。结果表明:第一种工艺的最佳制备条件为:烧结温度 1300℃、保温时间 2.5h;第二种工艺的最佳制备条件为:添加剂含量 25%,烧结温度 1280℃,保温时间 2h。 通过扫描电子显微镜、X 射线衍射仪、X 射线光电子能谱仪、红外辐射测量仪等现代分析测试设备对制备的红外辐射陶瓷材料进行了结构与性能表征。结果表明:用第一种工艺制备的材料主要组成为钛酸盐类物质,1～22μm波段红外发射率最高可达0.809。用第二种工艺制备的材料 Cu、Fe 元素的光电子能谱为几种价态的复合谱,主要组成为尖晶石型物质和钛酸盐类物质,1～22μm波段红外发射率最高可达 0.897。 综合分析影响材料红外发射率的因素发现:1300℃之前,升高烧结温度可在一定程度上提高材料中红外光区的发射率;添加过渡金属氧化物可以显著提高材料中红外光区的发射率,3～5μm波段的提高尤为明显,幅度高达 13.0%,1～22μm波段的提高幅度为 11.0%;多种尖晶石型物质的生成是添加过渡金属氧化物后材料发射率得以提高的根本原因;采用富金红石矿物原料制备高发射率的红外辐射陶瓷,对于提高该类矿产资源的经济附加值、降低生产成本具有重要意义。更多还原

【Abstract】 High efficient infrared radiation ceramics were studied and obtained. The ceramics were prepared at different sintering temperatures and vary sintering time using rutile mineral in group A. Using rutile mineral as main material and transition metal oxides Fe2O3、MnO2、CuO as additive produced high efficient infrared ceramics by Orthogonal design way in group B. The experiments show: in group A ,the best sintering condition is 1300℃ temperature and 2h time. In group B, the best preparing condition is 25% additive, 1280℃ temperature and 2h time. The structure and performance of infrared radiation ceramics were obtained using SEM, XRD, XPS and Infrared Radiation Measure Apparatus. The analysis show: for group A ,the major composition is titanic matter, and the emissivity in 1～22μm band is 0.809. For group B, the photoelectron spectrums of element Cu and Fe are appeared as complex state, the major composition are spinel matter and titanic matter, and the emissivity in 1～22μm band is 0.897. Infrared emissivity of samples improved with temperature’s increase before 1300℃ in group A. Infrared emissivity of samples in middle infrared band can be improved certainly by adding transition metal oxides, especially a increase of 13.0 percent in 3～5μm, a increase of 11.0 percent in 1～22μm . The form of spinel matter is the main reason that can improve infrared emissivity notably. The infrared radiation ceramics, prepared with rutile mineral, has a significant scene in decreasing cost and improving the mineral economic value.更多还原