Study on the thermal conductivity of silicon nitride ceramics with magnesia and yttria as sintering additives

2002 ◽  
Vol 57 (1) ◽  
pp. 15-19 ◽  
Author(s):  
Yuanbo Lin ◽  
Xiao-Shan Ning ◽  
Heping Zhou ◽  
Kexin Chen ◽  
Rong Peng ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Silicon Nitride ◽  
Sintering Additives ◽  
Nitride Ceramics

Fabrication of high thermal conductivity silicon nitride ceramics by pressureless sintering with MgO and Y2O3 as sintering additives

2020 ◽  
Vol 46 (17) ◽  
pp. 27175-27183
Author(s):  
Tao Lu ◽  
Tun Wang ◽  
Yingfei Jia ◽  
Maomao Ding ◽  
Ying Shi ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Silicon Nitride ◽  
High Thermal Conductivity ◽  
Pressureless Sintering ◽  
Sintering Additives ◽  
Nitride Ceramics

High thermal conductivity silicon nitride ceramics prepared by pressureless sintering with ternary sintering additives

2019 ◽  
Vol 16 (4) ◽  
pp. 1399-1406 ◽  
Author(s):  
Yusen Duan ◽  
Jingxian Zhang ◽  
Xiaoguang Li ◽  
Hainan Bai ◽  
Pavol Sajgalik ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Silicon Nitride ◽  
High Thermal Conductivity ◽  
Pressureless Sintering ◽  
Sintering Additives ◽  
Nitride Ceramics

Effects of Sintering Additives on the Microstructure and Mechanical Properties of Silicon Nitride Ceramics by GPS

2010 ◽  
Vol 105-106 ◽  
pp. 27-30 ◽  
Author(s):  
Wei Ru Zhang ◽  
Feng Sun ◽  
Ting Yan Tian ◽  
Xiang Hong Teng ◽  
Min Chao Ru ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Phase Transformation ◽  
Silicon Nitride ◽  
Porous Silicon ◽  
Flexural Strength ◽  
Relative Density ◽  
Sintering Additives ◽  
Microstructure And Mechanical Properties ◽  
Nitride Ceramics

Silicon nitride ceramics were prepared by gas pressure sintering (GPS) with different sintering additives, including La2O3, Sm2O3 and Al2O3. Effect of sintering additives on the phase-transformation, microstructure and mechanical properties of porous silicon nitride ceramics was investigated. The results show that the reaction of sintering additives each other and with SiO2 had key effects on the phase-transformation, grain growing and grain boundaries. With 9MPa N2 atmosphere pressure, holding 1h at 1850°C, adding 10wt% one of the La2O3, Sm2O3, Al2O3, porous silicon nitride was prepared and the relative density was 78%, 72%, 85% respectively. The flexural strength was less than 500MPa, and the fracture toughness was less than 4.8MPam1/2. Dropping compounds sintering additives, such as La2O3+Al2O3, Sm2O3+Al2O3 effectively improves the sintering and mechanical properties. The relative density was 99.2% and 98.7% with 10wt% compounds sintering additives. The grain ratio of length to diameter was up to 1:8. The flexural strength was more than 900MPa, and the fracture toughness was more than 8.9MPam1/2.

Development of High Performance Silicon Nitride Ceramics and their Applications

1992 ◽  
Vol 287 ◽  
Author(s):  
Yo Tajima
Keyword(s):  
Mechanical Properties ◽  
Silicon Nitride ◽  
High Performance ◽  
Future Prospect ◽  
Cutting Tools ◽  
Sintering Process ◽  
Sintering Additives ◽  
Nitride Ceramics ◽  
Engine Components

ABSTRACTProgress in sintering process and improvement of mechanical properties of silicon nitride ceramics are reviewed. Emphases are placed on contributions of advanced sintering techniques and better understanding of sintering additives and microstructure-properties relations. Current applications as engine components and cutting tools are described, and future prospect is considered.

Study on Thermal Conductivity of Spark-Plasma-Sintered Silicon Nitride Ceramics

2007 ◽  
pp. 1259-1262
Author(s):  
Xin Lu ◽  
Xiao Shan Ning ◽  
Wei Xu ◽  
He Ping Zhou ◽  
Ke Xin Chen
Keyword(s):  
Thermal Conductivity ◽  
Silicon Nitride ◽  
Nitride Ceramics ◽  
Spark Plasma ◽  
Sintered Silicon

Effect of LaB6 addition on mechanical properties and thermal conductivity of silicon nitride ceramics

2020 ◽  
Vol 46 (11) ◽  
pp. 17776-17783 ◽  
Author(s):  
Hanqin Liang ◽  
Weide Wang ◽  
Kaihui Zuo ◽  
Yongfeng Xia ◽  
Dongxu Yao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Silicon Nitride ◽  
Nitride Ceramics

Effect of MgF2 addition on mechanical properties and thermal conductivity of silicon nitride ceramics

2019 ◽  
Vol 45 (10) ◽  
pp. 12757-12763 ◽  
Author(s):  
Chunping Yang ◽  
Qiang Liu ◽  
Biao Zhang ◽  
Junjie Ding ◽  
Yicheng Jin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Silicon Nitride ◽  
Nitride Ceramics

Effect of β-Si3N4 Powder on Thermal Conductivity of Silicon Nitride Ceramics

2015 ◽  
Vol 655 ◽  
pp. 11-16 ◽  
Author(s):  
Xing Li Liu ◽  
Meng Meng Peng ◽  
Xiao Shan Ning ◽  
Yosuke Takahashi
Keyword(s):  
Thermal Conductivity ◽  
Heat Treatment ◽  
High Temperature ◽  
Silicon Nitride ◽  
High Temperature Heat Treatment ◽  
Plasma Sintering ◽  
Nitride Ceramics ◽  
Temperature Heat ◽  
Spark Plasma ◽  
Temperature Heat Treatment

To investigate the influence of β-Si3N4 powder on thermal conductivity of silicon nitride, coarse, fine β-Si3N4 powder and various β-Si3N4/α-Si3N4 ratios of starting powders were adopted to fabricate ceramics by spark plasma sintering at 1600°Cand subsequent high-temperature heat treatment at 1900°C with the sintering additives of Y2O3 and MgO. It is found that with more fine β-Si3N4 powder in the starting powder, β-Si3N4 grains exhibit high thermal conductivity, which is partly resulted from the compaction of β-Si3N4 grains.

The influence of sintering additives on the microstructure and material properties of silicon nitride ceramics investigated by advanced simulation tools

2017 ◽  
Vol 214 (6) ◽  
pp. 1600634
Author(s):  
Dorothea E. R. Brockmann ◽  
Torsten E. M. Staab ◽  
Friedrich G. Raether
Keyword(s):  
Silicon Nitride ◽  
Material Properties ◽  
Simulation Tools ◽  
Sintering Additives ◽  
Nitride Ceramics
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