隔热-相变复合热防护构件热防护能力研究

Thermal Protecting Performance of Conbined Thermal Insulation Part Composed of Ceramic Tile and Phase Change Composites

以隔热瓦、氯化锂相变复合材料、硝酸锂定形相变复合材料和季戊四醇定形相变复合材料为原料制备了隔热-相变复合热防护构件及其纯隔热对比样,采用快速升温单侧加热装置测试了其在1200℃下的长时热防护性能。结果表明,相同加热时间7650 s,复合热防护构件及纯隔热对比样的背温分别为222.3、644.0℃,复合热防护构件的隔热能力更强。在相近背温条件下,复合热防护构件背温199.5℃时,其控温时间为6780 s,而纯隔热对比样背温199.7℃时,其控温时间为3135s,复合热防护构件的控温时间更长。

The conbined thermal insulation part composed of ceramic tile and phase change composites(PCC)was prepared by ceramic tile,LiCl PCC,LiNO3 PCC,and pentaerythritol PCC.The thermal perotecting performance of the conbined thermal insulation part and its reference sample were characterized in a single-sided heating test equipment at 1200℃.The results showed that the back temperature of the conbined thermal insulation part is 222.3℃at the heating time of 7650 s,while the back temperature of the reference sample is 644.0℃,which indicates that the conbined thermal insulation part has better thermal insulation performance.The temperature control time for the conbined thermal insulation part is 6780 s at the back temperature of 199.5℃,while that of the reference sample is 3135 s at the back temperature of 199.7℃,which indicates the conbined thermal insulation part has much longer temperature control time at the close back temperature.