Effect of Si3N4 solid contents on mechanical and dielectric properties of porous Si3N4 ceramics through freeze-drying

doi:10.1016/j.jallcom.2017.10.172

	Effect of Si3N4 solid contents on mechanical and dielectric properties of porous Si3N4 ceramics through freeze-drying
	Li, Ling 3; Li, Qinggang 1,2,3; Hong, Juan 5; Sun, Mengyong 4; Zhang, Jie ; Dong, Shaoming 2
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2018
卷号	732 页码:136
关键词	Freeze-drying Pore structure Porous Si3N4 Mechanical property Dielectric constant
ISSN号	0925-8388
DOI	10.1016/j.jallcom.2017.10.172
英文摘要	Porous Si3N4 ceramics with uniform pore distributions were fabricated by freeze drying with liquid N-2 as refrigerant, and then sintered at 1700 degrees C under an N-2 pressure of 0.3 MPa. The Si3N4 dispersant slurries were prepared by ball milling for 12 h and casting into a mold using liquid nitrogen as a freezing medium with the top surface of the sample exposed to air at room temperature. The temperature gradient contributed to bimodal peaks of pore size distribution. Effects of solid concentration on the porosity, mechanical, and dielectric properties of the Si3N4 sample were systematically investigated. As the solid content increased from 15 vol.% to 40 vol.%, the porosity decreased from 83.9% to 40.58%. Therefore, flexural strength and compressive strength increased from 0.1 MPa to 94.7 MPa, and 1.3 MPa-314 MPa, respectively. Moreover, the dielectric constant increased from 1.4 to 4.0. This study indicated that the freeze- drying process is a useful method for fabricating novel porous Si3N4 ceramics with unidirectional channels. (C) 2017 Published by Elsevier B.V.
学科主题	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000415931900017
资助机构	Authors appreciate the financial support of the National Natural Science Foundation of China under the Grant No. of 51172256 and No. 51621091, the Grant No. of 51142010, the Grant No. of 51372099. Authors also appreciate the financial supported by Program for Scientific research innovation team in Colleges and universities of Shandong Province and the financial supported by the Opening Project of State Key Laboratory of High Performance Ceramics and Superfine Microstructure (SKL201601SIC) and the Project funded by China Postdoctoral Science Foundation of 2016M602184. Supports from the 111 Project of International Corporation on Advanced Cement-based Materials (No. D17001) is greatly appreciated. ; Authors appreciate the financial support of the National Natural Science Foundation of China under the Grant No. of 51172256 and No. 51621091, the Grant No. of 51142010, the Grant No. of 51372099. Authors also appreciate the financial supported by Program for Scientific research innovation team in Colleges and universities of Shandong Province and the financial supported by the Opening Project of State Key Laboratory of High Performance Ceramics and Superfine Microstructure (SKL201601SIC) and the Project funded by China Postdoctoral Science Foundation of 2016M602184. Supports from the 111 Project of International Corporation on Advanced Cement-based Materials (No. D17001) is greatly appreciated.
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/24538]
专题	中国科学院上海硅酸盐研究所
作者单位	1.Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Heilongjiang, Peoples R China 2.Univ Jinan, Shandong Prov Key Lab Preparat & Measurement Bldg, Jinan 250022, Shandong, Peoples R China 3.Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China 4.Shandong Ind Ceram Res & Design Inst Co Ltd, Zibo 255000, Peoples R China 5.Northwestern Polytech Univ, Sci & Technol Thermostruct Composite Mat Lab, Xian 710072, Shaanxi, Peoples R China 6.PLA Army Engn Univ, Coll Field Engn, Nanjing 210007, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Li, Ling,Li, Qinggang,Hong, Juan,et al. Effect of Si3N4 solid contents on mechanical and dielectric properties of porous Si3N4 ceramics through freeze-drying[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2018,732:136, 140.
APA	Li, Ling,Li, Qinggang,Hong, Juan,Sun, Mengyong,Zhang, Jie,&Dong, Shaoming.(2018).Effect of Si3N4 solid contents on mechanical and dielectric properties of porous Si3N4 ceramics through freeze-drying.JOURNAL OF ALLOYS AND COMPOUNDS,732,136.
MLA	Li, Ling,et al."Effect of Si3N4 solid contents on mechanical and dielectric properties of porous Si3N4 ceramics through freeze-drying".JOURNAL OF ALLOYS AND COMPOUNDS 732(2018):136.