SiC-ZrB2复合浆料流动性研究

doi:10.3724/SP.J.1077.2012.12641

无机材料学报 ›› 2013, Vol. 28 ›› Issue (5): 566-570.DOI: 10.3724/SP.J.1077.2012.12641

• • 上一篇

SiC-ZrB₂复合浆料流动性研究

李丹^1,2, 姚秀敏¹, 杨勇¹, 黄政仁¹

(1. 中国科学院上海硅酸盐研究所, 上海200050; 2. 中国科学院大学, 北京100864)

收稿日期:2012-10-24 出版日期:2013-05-10 网络出版日期:2013-04-22
作者简介:李丹. E-mail: leedan@student.sic.ac.cn

Rheological Properties of SiC-ZrB₂ Composite Suspensions

LI Dan^1,2, YAO Xiu-Min¹, YANG Yong¹, HUANG Zheng-Ren¹

(1. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; 2. University of Chinese Academy of Sciences, Beijing 100864, China)

Received:2012-10-24 Published:2013-05-10 Online:2013-04-22
About author:LI Dan (1984–), female, candidate of PhD. E-mail: leedan@student.sic.ac.cn
Supported by:
Foundation item: National Natural Science Foundation of China (51071167, 51102266);Instrument Developing Project of the Chinese Academy of Sciences (YZ200939);Shanghai Yangtze River Delta Cooperation Project (11495810100);Shanghai Pujiang Program (10PJ1410700);Key Laboratory of Nanodevices and Applications, SINANO, CAS (12CS01)

摘要/Abstract

摘要：

为制备高性能SiC-ZrB₂网眼多孔陶瓷, 对SiC-ZrB₂复合浆料的流动性质进行了初步研究。分析SiC和ZrB₂粉体在水溶液中的流动性质, 并对分散剂硅溶胶和粘结剂羧甲基纤维素(CMC)的添加量进行了优化。基于以上优化结果, 重点探索了固含量和ZrB₂添加量对浆料流动性质的影响。固含量为65wt%的浆料可作为有机泡沫浸渍过程的最佳条件, 而ZrB₂添加量不可超过25wt%。

关键词: SiC, ZrB₂, 羧甲基纤维素, 硅溶胶, 流变性质

Abstract:

The SiC-ZrB₂ composite slurry was investigated as preliminary work for the preparation of high-performance SiC-ZrB₂ reticulated porous ceramics (RPCs). The dispersions of SiC and ZrB₂ powders were investigated, and the amounts of dispersant and adhesive were optimized, respectively. Based on these results, the investigation focused on the influences of the solid loading and the ZrB₂ amount on the rheological behavior of suspensions. The suspension with 65wt% solid loading was chosen as the optimum for polymeric sponge replication process. And the ZrB₂ amount should be less than 25wt%.

Key words: SiC, ZrB₂, CMC, silica sol, rheological properties

中图分类号:

TQ174

李丹, 姚秀敏, 杨勇, 黄政仁. SiC-ZrB₂复合浆料流动性研究[J]. 无机材料学报, 2013, 28(5): 566-570.

LI Dan, YAO Xiu-Min, YANG Yong, HUANG Zheng-Ren. Rheological Properties of SiC-ZrB₂ Composite Suspensions[J]. Journal of Inorganic Materials, 2013, 28(5): 566-570.

图/表 7

Table 1 Chemical composition of original powders (wt%)

	SiC	Al₂O₃	SiO₂	MgO	Fe₂O₃	CaO	R₂O*
Silicon carbide	99.3	-	-	-	0.23	-	-
Alumina	-	99.60	0.06	-	0.01	0.03	0.21
Kaolin	-	35.86	48.67	0.19	0.28	-	2.05
Bentonite	-	14.78	61.46	2.30	3.67	3.18	4.07

Fig. 1 Zeta potential as a function of pH for SiC and ZrB2 powders dispersed in deionized water

Fig. 2 Viscosity curves of the suspensions with various silica sol concentrations

Fig. 3 Flow curves of the suspensions with various amounts of CMC

Fig. 4 Flow curves of suspensions with various solid loadings and 25wt% ZrB2 amount

Fig. 5 Flow curves of the suspensions with various ZrB2 additive amounts

Fig. 6 Viscosity curves of the suspensions with various ZrB2 additive amounts

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SiC-ZrB₂复合浆料流动性研究

Rheological Properties of SiC-ZrB₂ Composite Suspensions

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