التفاصيل البيبلوغرافية
| العنوان: |
莫来石晶须/陶瓷纤维增强堇青石质隔热材料. (Chinese) |
| Alternate Title: |
Mullite whisker-ceramic fiber reinforced cordierite thermal insulation materials. (English) |
| المؤلفون: |
秦梦黎, 罗颖, 申自强, 刘梦, 宋杰光, 王慈, 刘强 |
| المصدر: |
Refractories / Naihuo Cailiao; Feb2024, Vol. 58 Issue 1, p8-12, 5p |
| Abstract (English): |
Aiming at improving the low strength of cordierite insulation materials used in high-temperature industry, cordierite insulation materials were prepared using kyanite, clay, magnesia powder as raw materials, starch as the pore forming agent and curing agent, adding a suitable amount of aluminum silicate ceramic fiber and MoO3.The prepared materials have a mullite whisker-ceramic fiber multi and interlocked structure by the in-situ formation of mullite whiskers on the surface of aluminum silicate fiber catalyzed by MoO3. The effects of aluminum silicate ceramic fiber under the action of MoO3 heat treated at different temperatures (1 200, 1 250, 1 300 and 1 350 ℃) on the microstructure, cold mechanical properties and thermal conductivity of the materials were studied. The results show that: under the action of MoO3, mullite whiskers grow on the surface of aluminum silicate fiber, showing a vertical trend basically, and partially inserting in well-developed cordierite grains; with the heat treatment temperature increasing, the mullite whiskers on the surface of aluminum silicate ceramic fiber changes from short rods to slender needles, and the length to diameter ratio increases gradually; the cordierite material with the fiber-whisker multi and interlocked structure has improved mechanical properties while reduced thermal conductivity; the specimen heat treated at 1 350 ℃ has the optimal performance. [ABSTRACT FROM AUTHOR] |
| Abstract (Chinese): |
基于改善高温工业使用的堇青石质隔热材料强度较低的问题,以蓝晶石、黏土、氧化镁粉为原料,以小麦淀粉为造孔剂和固化剂,引入适量的硅酸铝陶瓷纤维和MoO3,通过MoO3催化莫来石晶须在陶瓷纤维表面的原位形成,制备了具有莫来石晶须/陶瓷纤维互锁多级结构增强的堇青石质隔热材料。研究了硅酸铝陶瓷纤维在MoO3的作用下于不同温度(1 200、1 250、1 300和1 350 ℃)热处理后对材料显微结构、常温力学性能和热导率的影响。结果表明:在MoO3的作用下,莫来石晶须在硅酸铝纤维表面生长,基本呈现垂直趋势,部分穿插于发育良好的堇青石晶粒中;随着热处理温度的升高,硅酸铝陶瓷纤维表面的莫来石晶须由短棒状转变为细长针状,且长径比逐渐增大;这种具有纤维/晶须多级结构的堇青石质材料,其力学性能得以提高的同时热导率也降低,其中1 350 ℃热处理后试样的性能最佳。 [ABSTRACT FROM AUTHOR] |
|
Copyright of Refractories / Naihuo Cailiao is the property of Naihuo Cailia (Refractories) Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |
