挤出成型制备高强度氮化硅陶瓷

王伟伟; 韩卓群; 马旭朝; 王营营; 王晓东; 宋涛; 李伶

硅酸盐通报, 2023, 42 (5): 1852, 网络出版: 2023-08-13

挤出成型制备高强度氮化硅陶瓷

Preparation of High Strength Silicon Nitride Ceramics by Extrusion

论文大纲

王伟伟 ^1,*韩卓群 ²马旭朝 ¹王营营 ¹王晓东 ¹宋涛 ¹李伶 ¹

作者单位

¹ 山东工业陶瓷研究设计院有限公司, 淄博 255000

² 济南大学材料科学与工程学院, 济南 250022

陶瓷氮化硅挤出成型弯曲强度显微结构烧结温度 ceramics silicon nitride extrusion flexural strength microstructure sintering temperature

摘要

以羧甲基纤维素(CMC)为黏结剂, 通过挤出成型的方式制备氮化硅陶瓷管材, 并研究了黏结剂含量对陶瓷管材生坯性能的影响, 烧结温度对氮化硅陶瓷相对密度、弯曲强度和微观形貌的影响, 以及氮化硅陶瓷的高温强度性能。结果表明: 黏结剂含量为7%(质量分数)时, 可制得干燥收缩均匀、表面光滑、无微裂纹的陶瓷管材生坯; 烧结温度在1 740 ℃时, 氮化硅陶瓷的相对密度和弯曲强度达到最大值, 分别为96%和(684±23) MPa, 其1 200 ℃时的弯曲强度达(380±21) MPa, 具有良好的高温强度性能。

Abstract

Silicon nitride ceramic pipes were prepared by extrusion with carboxymethyl cellulose (CMC) as the binder. The effect of binder content on the performance of green ceramic pipes was studied. The effect of sintering temperature on the relative density, flexural strength and microstructure of silicon nitride ceramics was studied. At the same time, the high temperature strength performance of silicon nitride ceramics was studied. The results show that with the binder content of 7% (mass fraction), the green ceramic pipe can dry and shrink evenly, and the surface is smooth without micro-cracks. At the sintering temperature of 1 740 ℃, the bulk density and flexural strength of silicon nitride ceramics reach the maximum value, which are 96% and (684±23) MPa, respectively. And the flexural strength reaches (380±21) MPa at 1 200 ℃, silicon nitride ceramics show a good high temperature strength performance.

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王伟伟, 韩卓群, 马旭朝, 王营营, 王晓东, 宋涛, 李伶. 挤出成型制备高强度氮化硅陶瓷[J]. 硅酸盐通报, 2023, 42(5): 1852. WANG Weiwei, HAN Zhuoqun, MA Xuzhao, WANG Yingying, WANG Xiaodong, SONG Tao, LI Ling. Preparation of High Strength Silicon Nitride Ceramics by Extrusion[J]. Bulletin of the Chinese Ceramic Society, 2023, 42(5): 1852.

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