热处理对高温气冷堆球形燃料元件酚醛树脂炭性能的影响  

Effect of Heat Treatment on Property of Phenol Resin Carbon of Pebble Fuel Element for HTGR

作　　者：周湘文[1] 张杰[1] 卢振明[1] 刘兵[1] 唐亚平[1] 唐春和[1] 

机构地区：[1]清华大学核能与新能源技术研究院,先进核能技术协同创新中心,先进反应堆工程与安全教育部重点实验室,北京100084

出　　处：《原子能科学技术》2015年第6期1022-1025,共4页Atomic Energy Science and Technology

基　　金：国家自然科学基金资助项目(51002084);国家科技重大专项资助项目(2008ZX06901-013);清华大学自主科研计划资助项目(20121088038)

摘　　要：为研究炭化和高温纯化等热处理对高温气冷堆球形燃料元件酚醛树脂炭性能的影响,对比分析了炭化后及高温纯化后树脂炭的微观组织和物理性能。结果表明,与炭化后的树脂炭相比,经高温纯化后的树脂炭具有更高的石墨化有序程度,树脂炭内微孔的平均孔径增大,比表面积降低超过50%。在723、773、823和873K温度下,干燥空气中高温纯化后的树脂炭具有较低的氧化速率,表现出更佳的抗氧化腐蚀性能。高温纯化后树脂炭石墨化有序程度的提高有利于提高球形燃料元件的综合性能。In order to study the effects of heat treatments such as the carbonization and high temperature purification （HTP） on the properties of phenol resin （PR） carbon of pebble fuel elements for HTGR , the micro‐structure and physical properties of PR carbon after carbonization and further HTP were comparatively analyzed .The results indicate that comparing with the PR carbon obtained by carbonization ,the PR carbon treated with further HTP exhibits higher degree of graphitization and larger average pore size ,and has specific surface area of less than 50% .In the dry air atmosphere ,the PR carbon treated with further HTP possesses lower oxidation rate and higher oxidation resistance property . The improvement of graphitization degree of PR carbon with＆amp;nbsp;further heat treatment of HTP is beneficial to upgrade the integrated properties of pebble fuel elements .

关 键 词：球形燃料元件 酚醛树脂炭 热处理 氧化性能 

分 类 号：TL352.2[核科学技术—核技术及应用] TL21