Corundum-mullite porous materials printed by direct ink writing

doi:10.3969/j.issn.1001-1935.2023.03.004

Abstract

Abstract: Sintered corundum micropowder with 10.3 μm of d₅₀,SiO₂ micropowder with 0.2 μm of d₅₀ and chemically pure sodium hexametaphosphate were used as main raw materials.The slurry with the solid content of 63% (φ) was prepared according to 11∶1 of the mass ratio of sintered corundum micropowder to SiO₂ micropowder and 0.15∶100 of the mass ratio of sodium hexametaphosphatate to sintered corundum micropowder.After vacuum defoaming treatment,the through-hole porous materials with regular triangle,square and hexagon cross sections were printed by the direct ink writing technology.The effects of the pore shape,pore size,force direction and heat transfer direction on the cold compressive strength and thermal conductivity of the materials were studied.The results show that:(1)the printed porous material has no visible defects or deformation,the surface is relatively smooth and even,and the extrusion lines are uniform and smooth;the contact between the printing layers is close without the stratification phenomenon;(2)at the same porosity,the cold compressive strength of the material increases gradually in the order of regular triangle pore material,square pore material and hexagonal pore material,while the thermal conductivity decreases gradually in this order;(3)at the same pore shape and porosity,the cold compressive strength decreases and the thermal conductivity increases with the increase of the pore size;at the same pore shape,pore size and porosity,the cold compressive strength and the thermal conductivity parallel to the through-hole direction are greater than those perpendicular to the through-hole direction.

Key words: 3D printing, direct ink writing, porous materials, compressive strength, thermal conductivity

摘要： 以d₅₀=10.3 μm的烧结刚玉微粉、d₅₀=0.2 μm的SiO₂微粉和化学纯六偏磷酸钠为主要原料,按m(烧结刚玉微粉)∶m(SiO₂微粉)= 11∶1,每100 g烧结刚玉微粉添加0.15 g六偏磷酸钠的配比配制固含量为63%(φ)的浆料,经真空消泡处理后,采用直写成型技术打印出孔的横截面分别为正三角形、正方形、正六边形的直通孔型多孔材料,研究了孔形、孔径以及受力方向和传热方向对材料常温耐压强度和热导率的影响。结果表明:1)打印出的多孔材料均未出现肉眼可见的缺陷或变形,表面较为光滑平整,挤出线条均匀流畅;打印层间接触紧密,未见分层现象。2)在孔隙率相同时,材料的常温耐压强度按正三角形孔材料、正方形孔材料、正六边形孔材料的顺序逐渐增大,热导率则按此顺序逐渐减小。3)在孔形和孔隙率相同时,材料的常温耐压强度随孔径的增大而减小,热导率则随孔径的增大而增大;在孔形、孔径和孔隙率相同时,平行于直通孔方向的常温耐压强度和热导率大于垂直于直通孔方向上的常温耐压强度和热导率。

关键词: 3D打印, 直写成型, 多孔材料, 耐压强度, 热导率

CLC Number:

TQ175.6

Zhu Kai, Yang Daoyuan, Wang Meijiao, Yang Lianghua, Zhao Xiang, Chen Junhuan, Yuan Huiyu. Corundum-mullite porous materials printed by direct ink writing[J]. Refractories, 2023, 57(3): 200-204.

朱凯, 杨道媛, 王美姣, 杨亮华, 赵祥, 陈俊寰, 原会雨. 直写成型刚玉-莫来石质多孔材料研究[J]. 耐火材料, 2023, 57(3): 200-204.

References

[1] 谭业锋.工业窑炉废气余热的回收与利用研究[D].济南:山东大学,2006.
[2] MEZQUITA A,BOIX J,MONFORT E,et al.Energy saving in ceramic tile kilns:cooling gas heat recovery[J].Applied Thermal Engineering,2014,65(1/2):102-110.
[3] SONG X Y,JIAN B H,JIN J.Preparation of porous ceramic membrane for gas-solid separation[J].Ceramics International,2018,44(16):20361-20366.
[4] VASINAA M,HUGHESB D C,HOROSHENKOV K V,et al.The acoustical properties of consolidated expanded clay granulates[J].Applied Acoustics,2005,67(8):787-796.
[5] UHLÍROVÁ T,GREGOROVÁ E,PABST W,et al.Preparation of cellular alumina ceramics via biological foaming with yeast and its microstructural characterization via stereological relations[J].Journal of the European Ceramic Society,2015,35(1):187-196.
[6] 李晶杨,余俊,赵惠忠,等.以溶胶浸渍核桃壳粉为造孔剂制备多孔莫来石材料[J].耐火材料,2022,56(3):231-234.
[7] 任威力,杨道媛,王瑞,等.发泡法制备镁铝尖晶石空心球隔热材料[J].耐火材料,2022,56(2):117-122.
[8] 何江锋,张海军,葛胜涛,等.SiC多孔陶瓷制备方法研究进展[J].耐火材料, 2020,54(2):163-171.
[9] WANG Z,HUANG C Z,WANG J,et al.Development of a novel aqueous hydroxyapatite suspension for stereolithography applied to bone tissue engineering[J].Ceramics International,2018,45(3):3902-3909.
[10] ELSAYED H,CHMIELARZ A,POTOCZEK M,et al.Direct ink writing of three dimensional Ti₂AlC porous structures[J].Additive Manufacturing,2019,28:365-372.
[11] JIN H Z,JIA D C,YANG Z H,et al.Direct ink writing of Si₂N₂O porous ceramic strengthened by directional β-Si₃N₄ grains[J].Ceramics International,2020,46(10):15709-15713.
[12] ZHU K,YANG D Y,YU Z F,et al.Additive manufacturing of SiO₂-Al₂O₃ refractory products via direct ink writing[J].Ceramics International,2020,46(17):27254- 27261.
[13] COSTAKIS W J,RUESCHHOFF L M,DIAZ-CANO A I,et al.Additive manufacturing of boron carbide via continuous filament direct ink writing of aqueous ceramic suspensions[J].Journal of the European Ceramic Society,2016,36(14):3249-3256.
[14] HUEC J L,SCHAEVERBEKE T,CLEMENT D,et al.Influence of porosity on the mechanical resistance of hydroxyapatite ceramics under compressive stress[J].Biomaterials,1995,16(2):113-118.
[15] MOON Y W,SHIN K H,KOH Y H,et al.Three-dimensional ceramic/camphene-based co-extrusion for unidirectionally macrochanneled alumina ceramics with controlled porous walls[J].Journal of the American Ceramic Society,2014,97 (1):32-34.
[16] RICE R W.Comparison of stress concentration versus minimum solid area based mechanical property-porosity relations[J].Journal of Materials Science,1993,28(8):2187-2190.
[17] WANG A J,MCDOWELL D L.In-plane stiffness and yield strength of periodic metal honeycombs[J].Journal of Engineering Materials and Technology,2004,126(2):137-156.