碳化钛－堇青石复相导电型陶瓷结构与红外辐射特性的研究

STUDY ON STRUCTURE AND IR-RADIATIVE PROPERTIES OF TiC-CORDIERITE MATRIX CONDUCTING CERAMIC

在高温炉内还原条件下根据固相化学反应理论制备了碳化钛－堇青石导电红外陶瓷样品，其电导率σ为１×１０－１～２×１０－４ｓ／ｃｍ，红外发射率ε≥８６％．对样品进行了ＸＲＤ、ＴＥＭ、ＥＰＲ等结构分析，显示了样品的结构与性能的相关性．研究表明碳化钛－堇青石复相导电型陶瓷材料在红外全波段内有均匀的红外发射率．

TiC-cordierite matrix ceramic samples were prepared by normal solid phase sintering in furnace.The measurement of properties of ceramic samples indicates that the conductivity is 2×x 10-4￣1× 10-1 s/cm and emissivity is ε≥ 86%. By XRD, IR and EPR analyses,the correlation between the structure and properties of the samples is explained in this paper. The result of the study shows that the emissivity of the sample of conducting IR-radiative ceramic of TiC-cordierite phase is uniform in the entire IR range.