Effect of powder characteristics on the thermal conductivity and mechanical properties of Si3N4 ceramics sintered by Spark plasma sintering

Dong, Hanghang; Zhao, Zhe; Wang, Cao

doi:10.1007/s10854-019-01074-w

Cited by 5 publications

(2 citation statements)

References 53 publications

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“…The speci c surface area (SSA) of SN1 and SN2 is 3.74 m 2 /g and 10.55 m 2 /g, respectively. Therefore, SN2 sample will be expected to yield better sintering activity, because its larger SSA indicates higher free surface energy, i.e., larger driven force for sintering [44,45]. The difference properties of Si 3 N 4 ceramics obtained from SN1 and SN2 powder was introduced in below.…”

Section: Resultsmentioning

confidence: 99%

Thermal Conductivity of Si₃N₄ Ceramics Fabricated From Carbothermal-reduction-derived Powder

Wang¹,

Li²,

Wu³

et al. 2021

Preprint

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Si3N4-based ceramic (Si3N4-5wt%Y2O3-3wt%MgO) was obtained from carbothermal-reduction-derived powder combined with gas pressure sintering. The phase, microstructure, thermal conductivity and mechanical properties of Si3N4 ceramics were comprehensively analyzed. Dense Si3N4 ceramic with uniform grain size was obtained after sintering at 1900°C for 7 h under a N2 pressure of 1.2 MPa. The secondary phase consisted of Y4Si2O7N2 and Y2Si3O3N4 was found to gather around triangular grain boundaries. The thermal conductivity, flexural strength, hardness and fracture toughness of the Si3N4 ceramics were 95.7 W·m-1·k-1, 715 MPa, 17.2 GPa and 7.2 MPa·m1/2, respectively. The results were compared with product derived from commercial powder, the improvement of thermal conductivity (~8.3%) and fracture toughness (~4.3%) demonstrating the superiority of Si3N4 ceramics prepared from carbothermal-reduction-derived powder.

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Section: Resultsmentioning

confidence: 99%

Thermal Conductivity of Si₃N₄ Ceramics Fabricated From Carbothermal-reduction-derived Powder

Wang¹,

Li²,

Wu³

et al. 2021

Preprint

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show abstract

“…Silicon nitride ceramics are the best overall structural ceramics with good mechanical properties, such as high fracture toughness [6][7][8] and high strength, 9 as well as excellent heat dissipation, 10,11 making them the most suitable ceramic substrates for electronic devices. However, there are still discrepancies between the real thermal conductivity of Si 3 N 4 and the theoretical one.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Si₃N₄ ceramics substrates with high thermal conductivity by tape casting and gas pressure sintering

Zhao,

Liu,

Zheng

et al. 2024

Int J Applied Ceramic Tech

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In this paper, high thermal conductivity Si3N4 ceramics were successfully fabricated through exploring and optimizing the tape casting process. The impact of various organic additives on the rheological characteristics of Si3N4 slurry was explored, and the pore size distribution and microstructure of the green tapes at different solid loadings were investigated, as well as the microstructure of Si3N4 ceramics. Green tapes with a narrow pore size distribution, a small average pore size, and a high density of 1.88 g cm−3 were prepared by the investigation and optimization of the Si3N4 slurry formulation. After gas pressure sintering, Si3N4 ceramics with a density of 3.23 g cm−3, dimensions of 78 mm × 78 mm, and a thickness of 0.55 mm were obtained. The microstructure of the Si3N4 ceramics showed a bimodal distribution and a low content of glassy phases. The thermal conductivity of the Si3N4 ceramics was 100.5 W m−1 K−1, the flexural strength was 735 ± 24 MPa, and the fracture toughness was 7.17 MPa m1/2.

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Synthesis of MgSiN2 under 0.1 MPa of nitrogen pressure via combustion

Nakashima

Ozeki

Zhou

et al. 2021

Ceramics International

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Effect of powder characteristics on the thermal conductivity and mechanical properties of Si3N4 ceramics sintered by Spark plasma sintering

Cited by 5 publications

References 53 publications

Thermal Conductivity of Si₃N₄ Ceramics Fabricated From Carbothermal-reduction-derived Powder

Thermal Conductivity of Si₃N₄ Ceramics Fabricated From Carbothermal-reduction-derived Powder

Fabrication of Si₃N₄ ceramics substrates with high thermal conductivity by tape casting and gas pressure sintering

Synthesis of MgSiN2 under 0.1 MPa of nitrogen pressure via combustion

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Effect of powder characteristics on the thermal conductivity and mechanical properties of Si3N4 ceramics sintered by Spark plasma sintering

Cited by 5 publications

References 53 publications

Thermal Conductivity of Si₃N₄ Ceramics Fabricated From Carbothermal-reduction-derived Powder

Thermal Conductivity of Si₃N₄ Ceramics Fabricated From Carbothermal-reduction-derived Powder

Fabrication of Si3N4 ceramics substrates with high thermal conductivity by tape casting and gas pressure sintering

Synthesis of MgSiN2 under 0.1 MPa of nitrogen pressure via combustion

Contact Info

Product

Resources

About

Fabrication of Si₃N₄ ceramics substrates with high thermal conductivity by tape casting and gas pressure sintering