Synthesis of honeycomb-like structured porous Si 3 N 4 ceramics with exceptionally high number of cells per square inch

Ma, Ning; Du, Linjing; Liu, Wenting; Li, Shiji; Zhang, Xiaoyan; Xu, Jie; Qu, Yanan; Gan, Ke; Yang, Jinlong

doi:10.1016/j.matlet.2016.04.030

Cited by 6 publications

(5 citation statements)

References 11 publications

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“…Until now, various ways have been employed for preparing porous ceramics, such as the replica technique, free drying, direct foaming, foam gel-casting, reaction bonding, sacrificial template, gel-casting, pore forming agent (PFA), extrusion, sol-gel method and so on, among which freeze drying [7,8,9] and gel casting [10,11] are preferred due to their simplicity and affordability. Gel-casting is a well-established near-net-shape technology for producing high-quality and complex shaped ceramic parts.…”

Section: Introductionmentioning

confidence: 99%

Porous Alumina Ceramics Obtained by Particles Self-Assembly Combing Freeze Drying Method

Feng

Tang

et al. 2019

Materials

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An innovative approach for fabricating porous alumina ceramics is demonstrated in this paper. The distinguished feature is that the construction of the porous structure stems from the interaction between ceramic particles, which is a poorly explored area. By tailoring the Derjaguin-Landau-Verwey-Overbeek (DLVO) interaction energy to the second minimum, the dilute ceramic slurry would be gelled by the weakly assembled particle network, and the assembled structure is conserved via a freeze drying strategy. The DLVO theoretical analyses revealed that the second minimum of interaction energy could be obtained when the counter-ion concentration in colloidal suspension is 1.5 × 10−2 mol/L. The properties of the as-assembled samples were compared with one produced by the conventional freeze drying method. Results showed that the self-assembly of alumina particles has a positive influence on micro structures. Unlike the laminar pores generated by the traditional freeze drying procedure, the assembled samples show homogeneously interconnected and hierarchical open pores which were stable even after a 24 h dwell time at 950 °C (open porosity is 79.19% for the slurry of vol 20% solid loading). Particularly, after sintering at 1550 °C for 2 h, open porosity (67.01%) of the assembled samples was significantly greater than that of their un-assembled counterparts (39.97%). Besides, the assembled sample shows a narrower pore size distribution and a relatively higher cumulative pore volume.

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Section: Introductionmentioning

confidence: 99%

Porous Alumina Ceramics Obtained by Particles Self-Assembly Combing Freeze Drying Method

Feng

Tang

et al. 2019

Materials

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“…The unique fracture behavior exhibited by the as‐prepared high‐precision honeycomb Si 3 N 4 ceramics also allowed us to prepare large‐scale honeycomb sandwich ceramics in the future. The compressive strengths of other state‐of‐the‐art 3D‐printed honeycomb and lattice ceramics are summarized in Figure 4d 4,40–48 . It can be proved that the preparation of Si 3 N 4 honeycomb ceramics in this work has relatively excellent mechanical properties, and this research will further simplify the preparation process of honeycomb Si 3 N 4 ceramics and greatly reduce the manufacturing cost.…”

Section: Resultsmentioning

confidence: 75%

“…The compressive strengths of other state-of-the-art 3Dprinted honeycomb and lattice ceramics are summarized in Figure 4d. 4,[40][41][42][43][44][45][46][47][48] It can be proved that the preparation of Si 3 N 4 honeycomb ceramics in this work has relatively excellent mechanical properties, and this research will further simplify the preparation process of honeycomb Si 3 N 4 ceramics and greatly reduce the manufacturing cost.…”

Section: Resultsmentioning

confidence: 99%

3D printing of honeycomb Si₃N₄ ceramic

Wang

et al. 2023

Int J Applied Ceramic Tech

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In this paper, a honeycomb Si3N4 ceramic was fabricated by 3D printing with a well‐preserved structure. The effects of Si3N4 content on the rheological properties of Si3N4/sol–silica ink and the printing resolution of products were investigated. The microstructure, phase composition, liner shrinkage rate, and fracture behavior of printed samples before and after sintering were systematically characterized in detail. The results showed that the modified inks had the optimized rheological properties, and the stress–shear rate curves corresponding to each slurry could be well described by Bingham and Herschel–Bulkley fluid models. The corresponding slump rates of the printed samples with different Si3N4 to sol–silica mass ratios were all lower than 4%, and the linear shrinkage rate of all of the samples after sintering was below 20%. The fracture behavior under compressive loading of the honeycomb Si3N4 ceramics tended to be non‐catastrophic fractures both before and after sintering. The compressive strengths of all of the printed samples decreased with the increase of the Si3N4 content, and the highest compressive strength of the honeycomb ceramics could reach 131.2 MPa after sintering at 1600°C, which was about 366.9% higher than that of the samples in green state prior to the sintering.

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“…Among porous ceramics with different pore structures, porous ceramics with unidirectionally aligned pore channels are attracting much attention because they are expected to have higher permeability 8‐9 . A variety of methods have been applied to prepare porous ceramics with unidirectionally aligned pore channels including extrusion molding process, 10‐11 self‐organization process, 12‐13 and freeze casting method 14‐19 . Compared to other methods, freeze casting, as a novel method, possesses many advantages including environment‐friendliness, small processing shrinkage (after vacuum drying) and is effective for porosity controlling, and thus has gained considerable attentions in recent years 20 …”

Section: Introductionmentioning

confidence: 99%

The sound absorption performance of the highly porous silica ceramics prepared using freeze casting method

Yao

Xia

et al. 2020

J Am Ceram Soc

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Highly porous silica ceramics with unidirectional pores were prepared using the freeze casting method. By adjusting the solid content and freezing temperature, the porosity of the ceramics was tailored in the range of 78.20%‐84.59% and pore size in the range of 8.4‐71.4 μm, respectively. Sound absorption properties of porous silica ceramics was studied and the effect of structural factors was systematically investigated. The results showed that higher porosity and smaller pores of the porous ceramics favored the sound absorption in the entire sound wave frequency. By backing the sample with small pore size porous ceramics, the sound absorption property was enhanced, particularly in the low and medium frequency range, thus the sound absorption peak shifted towards lower frequency. The presence of air gap in the back would also favor sound absorption in low and medium frequency range. The as‐fabricated porous silica ceramics owed excellent sound absorption properties due to their unidirectional pores and low flow resistances.

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Synthesis of honeycomb-like structured porous Si 3 N 4 ceramics with exceptionally high number of cells per square inch

Cited by 6 publications

References 11 publications

Porous Alumina Ceramics Obtained by Particles Self-Assembly Combing Freeze Drying Method

Porous Alumina Ceramics Obtained by Particles Self-Assembly Combing Freeze Drying Method

3D printing of honeycomb Si₃N₄ ceramic

The sound absorption performance of the highly porous silica ceramics prepared using freeze casting method

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Synthesis of honeycomb-like structured porous Si 3 N 4 ceramics with exceptionally high number of cells per square inch

Cited by 6 publications

References 11 publications

Porous Alumina Ceramics Obtained by Particles Self-Assembly Combing Freeze Drying Method

Porous Alumina Ceramics Obtained by Particles Self-Assembly Combing Freeze Drying Method

3D printing of honeycomb Si3N4 ceramic

The sound absorption performance of the highly porous silica ceramics prepared using freeze casting method

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3D printing of honeycomb Si₃N₄ ceramic