多孔铂电极的蓄热传热性能及热稳定性研究  

Research on Heat Storage and Heat Transfer Performance and Thermal Stability of Porous Pt Electrodes

作　　者：高君华 程正富[1] 郑瑞伦[1] 田亮亮[1] 宋静[3] Gao Junhua;Cheng Zhengfu;Zheng Ruilun;Tian Liangliang;Song Jing(School of Electronic Information and Electrical Engineering,Chongqing University of Arts and Sciences,Chongqing 402160,China;School of Electronic Engineering,Heilongjiang University,Harbin 150080,China;Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]重庆文理学院电子信息与电气工程学院,重庆402160 [2]黑龙江大学电子工程学院,黑龙江哈尔滨150080 [3]中国科学院过程工程研究所,北京100190

出　　处：《稀有金属材料与工程》2023年第7期2533-2539,共7页Rare Metal Materials and Engineering

基　　金：重庆市自然科学基金面上项目(cstc2020jcyj-msxmX0920);重庆市教委科技项目(KJQN202101304);重庆市永川区自然科学基金(2021yc-jckx20045);重庆市教委在渝高校与中科院所属院所合作项目(HZ2021013)。

摘　　要：本研究应用固体物理理论和方法,研究了氧传感器多孔Pt电极材料的热容量、热导率等蓄热传热性能及其热稳定性随温度、时间和晶粒半径的变化规律,探讨了原子非简谐振动对电极材料蓄热传热性能及热稳定性的影响。研究表明,多孔Pt电极的定容热容量随温度的升高先增大后趋于恒定,随晶粒半径和时间的增大而减小;多孔Pt电极的蓄热性能热稳定性系数随温度的升高先急剧增大后迅速减小,最后趋于恒定,在温度约60 K时,其蓄热性能热稳定性最差;多孔Pt电极的热导率随温度的升高先急剧减小后趋于恒定,随晶粒半径的增加而增大,随时间的增长而减小;表面层对热导率的贡献随温度升高先急剧减小后趋于0;多孔Pt电极原子振动的非简谐效应使其热容量有所减小,而使蓄热性能热稳定性系数和热导率有所增大。本研究所得结果与其他文献的结果基本一致,其结论可为固体电解质氧传感器的稳定性问题提供理论指导。The variations of the heat storage and heat transfer properties,such as heat capacity,thermal conductivity,and thermal storage stability,with temperature,time and grain radius of Pt electrode for oxygen sensor are studied by using the theory and method of solid-state physics,and the effect of anharmonic vibration of atoms on the heat storage and heat transfer properties and the thermal stability is discussed.The results show that the heat capacity of Pt electrode increases with temperature,increasing at first then tending to be constant,and decreases with grain radius and time increasing.The thermal storage stability coefficient of the Pt electrode material increases sharply at first and then decreases rapidly with temperature increasing,and finally tends to be constant.When the temperature is about 60 K,the thermal storage stability is the worst.The thermal conductivity of Pt electrode material decreases sharply at first and then tends to be constant with temperature increasing,increases with grain radius increasing,and decreases with time increasing.The contribution of the surface layer to thermal conductivity decreases sharply at first and then tends to be zero with temperature increasing.The anharmonic effect of the electrode material makes the heat capacity decrease,while makes the thermal storage stability coefficient and thermal conductivity increase.The results in this paper are basically consistent with that in other literatures,and the conclusions can provide theoretical guidance for the stability of solid electrolyte oxygen sensors.

关 键 词：多孔Pt电极 热容量 热导率 蓄热稳定性 非简谐效应 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]