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[1]陈常连,罗马亚,宋成胜,等.硅基添加剂作粘结剂的多孔碳化硅陶瓷的制备与表征[J].武汉工程大学学报,2014,(12):49-55.[doi:10. 3969/j. issn. 1674-2869. 2014. 012. 010]
 ,,et al.Preparation and characterization of porous silicon carbide ceramicwith silicate addictive as binder[J].Journal of Wuhan Institute of Technology,2014,(12):49-55.[doi:10. 3969/j. issn. 1674-2869. 2014. 012. 010]
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硅基添加剂作粘结剂的多孔碳化硅陶瓷的制备与表征(/HTML)
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
期数:
2014年12期
页码:
49-55
栏目:
材料科学与工程
出版日期:
2014-12-31

文章信息/Info

Title:
Preparation and characterization of porous silicon carbide ceramicwith silicate addictive as binder
文章编号:
1674 - 2869(2014)012 - 0049 - 07
作者:
陈常连罗马亚宋成胜季家友黄志良徐 慢
武汉工程大学材料科学与工程学院,湖北 武汉 430074
Author(s):
CHEN Chang-lian LUO Ma-ya SONG Cheng-sheng JI Jia-you HUANG Zhi-liang XU Man
School of Material Science and Engineering, Wuhan Institute of Technology, Wuhan 430074, China
关键词:
多孔碳化硅焦磷酸硅孔隙率抗折强度
Keywords:
silicon carbide ceramic silicon pyrophosphate porosity bending strength
分类号:
TB35
DOI:
10. 3969/j. issn. 1674-2869. 2014. 012. 010
文献标志码:
A
摘要:
以碳化硅、磷酸和二氧化硅为原料,采用常压烧结工艺,制备了系列硅基磷酸盐为粘结剂的多孔碳化硅陶瓷,并对烧结样品的密度、孔隙率、物相、显微结构及其力学性能和耐酸碱性能进行了分析和表征. 结果表明,烧结样品的密度随烧结温度和粘接剂含量的增加而减小,孔隙率的变化则相反,同时样品的抗折强度随之先增大再减小,并且其断裂方式为沿晶断裂,样品孔隙率均在23.1%~39.2%之间,在烧结温度为1 250 ℃、二氧化硅质量分数为1.78%时,抗折强度达到最大值39.158 MPa;样品的物相由碳化硅和二氧化硅以及少量的焦磷酸硅组成,二氧化硅的存在及磷酸盐的形成促进了碳化硅的烧结;所有样品耐酸性能较高,质量损失率为0.545 2%~1.777 2%,耐碱性能较弱,质量损失率约为100%,晶间二氧化硅和焦磷酸硅的存在及存在量是其主因.
Abstract:
The porous silicon carbide ceramics with silicon pyrophosphate as the binder were prepared using silicon carbide, phosphoric acid and silicon dioxide as raw materials by pressureless sintering. The density, porosity, crystal phase, microstructure, mechanical properties, and acid and alkali resistance of the sintered samples were analyzed and characterized. The results show that the density of the sintered samples increases and then decreases with the increase of sintering temperatures and the binder content, on the contrary, the variation of porosity of the sintered samples shows a reverse rule; at the same condition, the bending strength of the sintered samples increases and then decreases, and the fracture mode is a typical intergranular fracture; the porosity of the samples ranges from 23.1% to 39.2%, and the maximum of the bending strength is 39.158 MPa when the sintering temperature is 1 250 ℃ and the binder content is 1.78%; the main phases are composed of silicon carbide, silicon dioxide and slight silicon pyrophosphate, and the sintering process is promoted by the silicon dioxide and silicon pyrophosphate; because of the existence of the silicon dioxide and silicon pyrophosphate on the intercrystalline, all the sintered samples have strong acid resistance, the mass loss rates are between 0.545 2% and 1.777 2%; the alkali resistance of samples is very weak and the mass loss rate reaches 100%.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2014-09-25基金项目:国家自然科学基金项目(51374155);湖北省自然科学基金项目(2014CFB796)作者简介:陈常连(1967-),男,山东青岛人,副教授,博士. 研究方向:先进结构及功能陶瓷.
更新日期/Last Update: 2015-01-26