Fabrication, microstructure and physico-mechanical properties of highly porous acicular mullite ceramic foams by freeze casting method
Fabrication, microstructure and physico-mechanical properties of highly porous acicular mullite ceramic foams by freeze casting method
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冷冻铸造法制备高孔针状莫来石泡沫陶瓷、微观结构及物理力学性能
DOI：
10.1088/2053-1591/ab4af9
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发表时间：
2019-10
影响因子：
2.3
通讯作者：
Luo Lijie
中科院分区：
文献类型：
--
作者：
Dong Lei;Ruan Zehai;Chen Yongjun;Li Jianbao;Luo Lijie
本文采用冷冻铸造法成功制备了具有晶须互锁结构的高孔莫来石陶瓷。该陶瓷具有很高的孔隙率（高达94%）和高的压缩强度（高达3.65 MPa）。研究发现，聚乙烯醇（PVA）作为粘结剂对陶瓷的显微结构也有显著影响。当PVA浓度较高（4wt%）时，可得到晶须状的互锁结构，而当PVA浓度较低（1%）时，可得到排列整齐的层状孔结构。此外，陶瓷样品有小于3%的收缩率，并发现在浆料中的固体含量的影响陶瓷的孔隙率和压缩强度很大。
In this article, highly porous mullite ceramics with whisker-interlocked microstructure were successfully prepared by freeze casting method. The ceramics possessed very high porosity (up to 94%) and high compressive strength (up to 3.65 MPa). It was found that polyvinyl alcohol (PVA) using as a binder could also affect the microstructure of ceramics significantly. Whisker-interlocked structure could be obtained when PVA concentration was high (4 wt%), while low PVA concentration (1%) led to the aligned lamellar pore structure. Moreover, the ceramic samples had small shrinkages of less than 3%, and solid loading in slurry was found to influence the porosity and compressive strength of the ceramics greatly.
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DOI：
10.1016/j.jeurceramsoc.2012.10.011
发表时间：
2013-04-01
影响因子：
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作者：
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通讯作者：
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