Effect of K2O on Synthesis Process of AL8B4C7 Using Oxide Raw Materials

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Effect of K₂O on Synthesis Process of AL₈B₄C₇ Using Oxide Raw Materials

更新时间：2025-07-09

- Effect of K₂O on Synthesis Process of AL₈B₄C₇ Using Oxide Raw Materials
- Vol. 45, Issue 3, Pages: 112-116(2011)
- 作者机构：
  
  武汉科技大学耐火材料与高温陶瓷国家重点实验室培育基地,武汉,430081
- 作者简介：
- 基金信息：
- DOI：
  CLC： TB35
- Online First：10 March 2011，
  
  Published：2011
- 稿件说明：
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Effect of K₂O on Synthesis Process of AL₈B₄C₇ Using Oxide Raw Materials[J]. 2011, 45(3): 112-116.
DOI：

Effect of K₂O on Synthesis Process of AL₈B₄C₇ Using Oxide Raw Materials[J]. 2011, 45(3): 112-116. DOI：

摘要

采用硼砂、金属铝和碳粉为原料一步合成Al

.在合成过程中掺入不同含量的K

研究杂质K

O对合成Al

的影响.将原料混合均匀

在200 MPa的压力下压制成20 mm×20 mm的圆柱型试样

将干燥后的试样在不同温度下的流动氩气气氛中进行合成.利用化学分析、XRD和SEM等分析测试技术

研究了K

O含量以及烧结温度对反应合成材料物相组成和显微结构的影响.结果表明:尽管加入不同含量的K

但其高温烧结反应后

若K

O的质量分数在0.019%～0.028%之间

就不出现含K的新相.K

O的加入不利于Al

的合成

它可将Al

的开始生成温度提升至1 400 ℃

而且1 700 ℃时

含量较不加入K

O时明显减少.添加K

O合成的Al

为1 μm左右大小的无规则小颗粒.

Abstract

was synthesized by using borax

aluminum and carbon powders as the starting materials and adding different amount of K

O. The powders were fully mixed and then pressed into cylindrical samples with the size of 20 mm×20 mm at 200 MPa. The samples were dried and heated at different temperatures in the flowing argon atmosphere. The effect of K

O content and the sintering temperature on the phase composi

tion and microstructure of Al

was investigated by the chemical analysis

XRD and SEM methods. The results show that in the synthesis process of Al

the K

O content in the sintered samples was 0.019%-0.028%

and no new phase containing K element was detected although the K

O content in the starting materials was different. K

O enhanced the formation temperature of Al

from 1 300 ℃ to 1 400 ℃ and K

O significantly reduced the generation of Al

at 1 700 ℃. In addition

particles showed irregular shape with the size of ～1 μm after K

O was added to the starting materials.

关键词

Keywords

references

YAMAGUCHI A. Features and future development of the carbon-containing refractory [J]. Key Eng Mater, 2003, 247: 239-244.

VIALA J C, BOUIX J, GONZALEZ G, et al. Chemical reactivity of aluminum with boron carbide [J]. Journal of Material Science, 1997, 32(17): 4559-4573.

WANG T, YAMAGUCHI A. Some properties of sintered Al8B4C7 [J]. Journal of Material Science Letter, 2000, 19(12): 1045-1046.

INOUE Z. Synthesis and X-ray crystallography of aluminum boron carbide, Al8B4C7 [J]. Journal of Material Science, 1980, 15(12): 3036-3040.

廖陆林, 谭寿洪, 江东亮. 以Al-B4C-C为烧结助剂的SiC陶瓷液相烧结研究 [J]. 无机材料学报, 2002, 17(2): 265-270.

LIAO Lulin, TAN Shouhong, JIANG Dongliang. Liquid-phase sintering of SiC with Al-B4C-C as sintering aids [J]. Journal of Inorganic Materials, 2002, 17(2): 265-270.

陈肇友.化学热力学与耐火材料[M]. 北京:冶金工业出版社, 2005.

余毅.氧化物原料合成Al8B4C7的机理研究[D]. 武汉:武汉科技大学材料与冶金学院, 2007.

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