Ultrafast high-temperature sintering of silicon nitride: A comparison with the state-of-the-art techniques

Luo, Rui-Xin; Kermani, Milad; Guo, Zhaoliang; Dong, Jin‐Yong; Hu, Chunfeng; Zuo, Fei; Grasso, Salvatore; Jiang, Beibei; Nie, Guanglin; Yan, Zheng-Qing; Wang, Qiang; Gan, Yanling; He, Fupo; Lin, Hua‐Tay

doi:10.1016/j.jeurceramsoc.2021.06.021

Cited by 45 publications

(12 citation statements)

References 21 publications

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“…The black region on the surface of the UHS-B1 and UHS-B2 bulks is due to carbon reduction in the graphite felt strip during sintering, which is a common occurrence in other materials as well. However, it does not affect the performance of the bulks and is thus considered to be harmless [4,38]. Throughout the entire sintering process, the temperature can be adjusted and controlled within a wide range by tuning and programming the electrical parameters.…”

Section: Densification Processmentioning

confidence: 99%

Ultrafast high-temperature sintering of high-entropy oxides with refined microstructure and superior lithium-ion storage performance

Bai¹,

Li²,

Lu³

et al. 2023

Journal of Advanced Ceramics

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High-entropy oxides (HEOs) have received significant attention because of their tunable mechanical properties and wide range of functional applications. However, the conventional method used for sintering HEOs requires prolonged processing time, which results in excessive grain growth, thereby compromising their performance. Here, an ultrafast high-temperature sintering (UHS) strategy was adopted, and rock-salt composite (Mg 0.2 Co 0.2 Ni 0.2 Cu 0.2 Zn 0.2 )O was selected as model materials. Experimental parameters were tuned to illustrate the influence of applied current and soaking time on the densification process and resulting grain size. Additionally, the electrochemical performance of UHS-synthesized microparticles as anode materials in lithium-ion batteries was investigated. The results show that the ultrafast heating rate results in fine grains with a diameter of 6-8 μm and density of 95%, which are much smaller and similar to those obtained using the conventional sintering method (25 μm and 96%). Moreover, the high surface area and reactivity of the microparticles, as well as their sluggish diffusion effect and structural stability, contribute to outstanding performance with high capacity (336 mA•h/g at 1 A/g) and ultralong cyclability (1000 cycles). This novel technique offers valuable insights into the densification process of HEOs and other materials and can thus broaden their application range.

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Section: Densification Processmentioning

confidence: 99%

Ultrafast high-temperature sintering of high-entropy oxides with refined microstructure and superior lithium-ion storage performance

Bai¹,

Li²,

Lu³

et al. 2023

Journal of Advanced Ceramics

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“…This technique enables the densification of specimens even with complex shapes, by using a relatively simple setup if compared to SPS or FSPS. So far it has been applied to different oxide systems [22][23][24][25][26][27][28][29][30][31], glasses [32], carbides [33,34], nitrides [35] and high-entropy borides [36].…”

Section: Introductionmentioning

confidence: 99%

Ultrafast high-temperature sintering (UHS) of ZrB2-based materials

De Bona,

Manière,

Sglavo

et al. 2024

Journal of the European Ceramic Society

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“…during sintering, which is essential to prepare oxide electrolytes for solid-state batteries. [7][8][9] Third, the ultrafast heating rate and high temperature promote the materials evolving to a nonequilibrium state, which would possibly bring unexpected benefits, such as reducing activation energy for densification, 10 enhancing, 11 or hindering 12 certain phase transformations.…”

Section: Introductionmentioning

confidence: 99%

“…To date, several materials have been densified using UHS, including oxides, 13 nitrides, 11 and intermetallics 14 . However, to the best of our knowledge, consolidation of glass–ceramics via UHS has not been reported yet.…”

Section: Introductionmentioning

confidence: 99%

Far from equilibrium ultrafast high‐temperature sintering of ZrO₂–SiO₂ nanocrystalline glass–ceramics

Sathyanath

et al. 2023

J Am Ceram Soc.

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Ultrafast high‐temperature sintering (UHS) is a novel sintering technique with ultrashort firing cycles (e.g., a few tens of seconds). The feasibility of UHS has been validated on several ceramics and metals; however, its potential in consolidating glass–ceramics has not yet been demonstrated. In this work, an optimized carbon‐free UHS was utilized to prepare ZrO2–SiO2 nanocrystalline glass–ceramics (NCGCs). The phase composition, grain size, densification behavior, and microstructures of NCGCs prepared by UHS were investigated and compared with those of samples sintered by pressureless sintering. Results showed that NCGCs with a high relative density (～95%) can be obtained within ～50 s discharge time by UHS. The UHS processing not only hindered the formation of ZrSiO4 and cristobalite but also enhanced the stabilization of t‐ZrO2. Meanwhile, owing to the ultrashort firing cycles, the UHS technology allowed the NCGCs to be consolidated in a far from equilibrium state. The NCGCs showed a microstructure of spherical monocrystalline ZrO2 nanocrystallites embedded in an amorphous SiO2 matrix.

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Ultrafast high-temperature sintering of silicon nitride: A comparison with the state-of-the-art techniques

Cited by 45 publications

References 21 publications

Ultrafast high-temperature sintering of high-entropy oxides with refined microstructure and superior lithium-ion storage performance

Ultrafast high-temperature sintering of high-entropy oxides with refined microstructure and superior lithium-ion storage performance

Ultrafast high-temperature sintering (UHS) of ZrB2-based materials

Far from equilibrium ultrafast high‐temperature sintering of ZrO₂–SiO₂ nanocrystalline glass–ceramics

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Ultrafast high-temperature sintering of silicon nitride: A comparison with the state-of-the-art techniques

Cited by 45 publications

References 21 publications

Ultrafast high-temperature sintering of high-entropy oxides with refined microstructure and superior lithium-ion storage performance

Ultrafast high-temperature sintering of high-entropy oxides with refined microstructure and superior lithium-ion storage performance

Ultrafast high-temperature sintering (UHS) of ZrB2-based materials

Far from equilibrium ultrafast high‐temperature sintering of ZrO2–SiO2 nanocrystalline glass–ceramics

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Far from equilibrium ultrafast high‐temperature sintering of ZrO₂–SiO₂ nanocrystalline glass–ceramics