Article(id=1319726345593139959, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1319726260922728931, articleNumber=null, orderNo=null, doi=10.14062/j.issn.0454-5648.20250041, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1736870400000, receivedDateStr=2025-01-15, revisedDate=1739462400000, revisedDateStr=2025-02-14, acceptedDate=null, acceptedDateStr=null, onlineDate=1792576880118, onlineDateStr=2026-10-21, pubDate=1758297600000, pubDateStr=2025-09-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1792576880118, onlineIssueDateStr=2026-10-21, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1792576880118, creator=13701087609, updateTime=1792576880118, updator=13701087609, issue=Issue{id=1319726260922728931, tenantId=1146029695717560320, journalId=1263187385517883426, year='2025', volume='53', issue='9', pageStart='2419', pageEnd='2752', issueExtLink='null', onlineDate='null', pubDate='1758297600000', pubDateStr='2025-09-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1792576859932, creator='13701087609', updateTime=1792577418267, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1319728602791395512, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1319726260922728931, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1319728602791395513, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1319726260922728931, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=2696, endPage=2705, ext={EN=ArticleExt(id=1319726345819632376, articleId=1319726345593139959, tenantId=1146029695717560320, journalId=1263187385517883426, language=EN, title=Digital Light Processing of Cross-Scale Porous Zirconia Ceramics, columnId=1319726165087077079, journalTitle=Journal of the Chinese Ceramic Society, columnName=Research Article, runingTitle=null, highlight=null, articleAbstract=
Introduction

3% yttria-stabilized tetragonal phase zirconia ceramics (3Y-TZP) show a significant potential in aerospace application due to their low thermal conductivity, excellent high-temperature stability, and mechanical strength. However, it is difficult for conventional forming methods of porous ceramics to meet the requirements for complex structural designs. Digital Light Processing (DLP) is an important additive manufacturing method to fabricate components with complex geometries and high-precision, which can balance micron-scale resolution and efficient production. The macro-microporous structure of multiscale porous ceramics can take full advantage of multilevel porosity advantages, balancing thermal insulation and mechanical properties. Therefore, in this paper, DLP technology was combined with the pore-forming agent method to achieve the controllable molding of zirconia ceramics with multilevel pores. The printability of high solid-loading porous ceramic slurry was optimized, and the effect of sintering temperature on the microstructural evolution and mechanical properties of ceramics was investigated.

Methods

The ceramic slurry was prepared through batched addition of ball-milled and dried 3Y-TZP powder into a photosensitive resin premix, followed by thorough homogenizationin a model DSG2300Z homogenizer at 1200 r/min. 3Y-TZP slurries with 40% solid loading were prepared with different dispersants. Their rheological behavior was analyzed by a model MCR302 rheometer to identify the optimal dispersant type and content. Subsequently, the slurries with different solid loadings were prepared, and the appropriate solid loading was selected. Based on the optimized parameters, liquid organic pore-forming agent (i.e., polyethylene glycol (PEG) 400) was added at different volume fractions of 5%, 10%, and 15% to replace of the equivalent resin volume fractions. The optimal slurry composition was determined by rheological property.

The green body was prepared using a DLP printer with 405 nm UV light to cure the resin. The argon debinding and air decarbonization-sintering combined processes were then determined by thermogravimetry-differential scanning calorimetry (TG-DSC) on the green body. The ceramic components were subsequently held at different sintering temperatures (i.e., 1400, 1450, 1500 ℃) for 2 h, respectively. The microstructures of 3Y-TZP powder, green body, and sintered ceramics were determined by field-emission scanning electron microscopy (MAIA3 LMH, Tescan Co., Czech Republic). The chemical composition of the ceramic powders and dispersant was characterized using Fourier infrared spectrometry (IRPrestige-21, Shimadzu Co., Japan). The phase composition was analyzed by X-ray diffraction (d8 advance, Bruker Co., Germany). Three-point bending tests were conducted on ceramic specimens (50 mm×5 mm×4 mm) to evaluate the mechanical strength. The span was 20 mm and the load loading rate was 0.5 mm·min-1. The microstructural porosity was measured by Archimedes water displacement method.

Results and discussion

In this study, the slurry formulation for porous zirconia ceramics is optimized. Compared with dispersants KH560 and Solsperse41000, a dispersant KOS110 effectively reduces slurry viscosity. The infrared spectroscopy analysis reveals that KOS110 undergoes esterification reactions with zirconia particles through hydroxyl groups(-OH), thereby enhancing the dispersion of ceramic particles. The slurry viscosity initially decreases and then increases as the content of KOS110 increases, and reaches the lowest value at 3% addition. The yield stress and K value of the slurry are lowest when 3% KOS110 is added, proving that the rheological behavior of the slurry is optimal at this time. Increasing solid loading reduces interparticle distances in the dispersed slurry. When solid content exceeds 50%, the viscosity increases dramatically. Therefore, 50% solid loading can ensure a printability and a high solid content.

The introduction of PEG into 3Y-TZP slurry can form lubricating layers between ceramic particles through free molecular movement, improving the dispersion of the slurry. The optimal rheological performance is achieved at 10% PEG addition. The optimized high-solid 3Y-TZP slurry demonstrates a superior formability, which can be used to print 3Y-TZP hierarchical porous ceramic green body. When the sintering temperature increases from 1400 ℃ to 1500 ℃, the ceramic particles gradually transition from loose to tightly packed arrangement, accompanied by porosity reduction. After sintering at 1500 ℃, the ceramic samples have both appropriate porosity and strength. The flexural strength reaches 717 MPa and the porosity is 4.03%. The XRD patterns show that the ceramic crystal phase is a stable tetragonal phase after sintering at this temperature.

Conclusions

3Y-TZP ceramics with a multidimensional pore structure were prepared by DLP technology combined with the pore-forming agent method. The effects of dispersant type and content on the rheological behavior of ceramic slurries with 40% solid content were investigated. The results indicated that 3% mass fraction of KOS110 could effectively improve the rheology of the slurry due to the chemical bonding and steric hindrance. The solid content and PEG content were synergistically optimized. The results showed that an effective lubrication layer could be formed between ceramic particles when 10% PEG was added to replace the photosensitive resin at 50% solid content. The viscosity of the slurry at this time met the requirements for DLP printing. After DLP printing and high temperature sintering at 1500 ℃, the 3Y-TZP ceramic was structurally stable and had both high appropriate porosity and mechanical strength.

, authors=Shuo YAN, Chonggao BAO, Shijia LI, Wencai DONG, Haohong QIU, authorsList=Shuo YAN, Chonggao BAO, Shijia LI, Wencai DONG, Haohong QIU, authorCompany=null, correspAuthors=Chonggao BAO, authorNote=

YAN Shuo (2000-), female, Master Candidate. E-mail:

, correspAuthorsNote=
BAO Chonggao (1965-), male, Ph.D., Professor. E-mail:
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采用基于立体光固化数字光处理技术(DLP)结合造孔剂法,制备多维孔隙结构氧化钇稳定的四方晶体氧化锆陶瓷(3Y-TZP陶瓷)。为了提升光固化陶瓷浆料的可打印性,系统探讨了分散剂种类和含量对浆料流变性的影响,并分析了分散剂的作用机理。此外,还研究了固含量及有机液态造孔剂聚乙二醇(PEG)400含量对3Y-TZP陶瓷浆料流变行为的影响。结果表明:3%(质量分数)的KOS110对改善氧化锆陶瓷浆料的流变行为效果最佳。PEG400可以游离于氧化锆陶瓷颗粒之间或部分吸附于陶瓷颗粒表面,当添加量为10%(体积分数)时能够使颗粒间形成有效的润滑层,改善浆料的流变性能。优化后的3Y-TZP陶瓷浆料固含量为50%,光固化打印得到层间结合良好的复杂结构陶瓷生坯,经1500 ℃保温2 h后,复杂宏孔结构烧结试样兼具合适的孔隙率和强度,显气孔率4.03%,抗弯强度达717 MPa。

, authors=闫硕, 鲍崇高, 李世佳, 董文彩, 邱皓泓, authorsList=闫硕, 鲍崇高, 李世佳, 董文彩, 邱皓泓, authorCompany=null, correspAuthors=鲍崇高, authorNote=

闫硕(2000—),女,硕士研究生。

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鲍崇高(1965—),男,博士,教授。
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光固化成型工艺制备跨尺度多孔结构氧化锆陶瓷
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闫硕 , 鲍崇高 , 李世佳 , 董文彩 , 邱皓泓
硅酸盐学报 | 研究论文 2025,53(9): 2696-2705
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硅酸盐学报 |研究论文 2025 , 53 (9) : 2696 -2705
光固化成型工艺制备跨尺度多孔结构氧化锆陶瓷
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闫硕 , 鲍崇高 , 李世佳, 董文彩, 邱皓泓
作者信息
  • 西安交通大学,金属材料强度国家重点实验室,西安 710049
通讯作者:
鲍崇高(1965—),男,博士,教授。
作者简介:

闫硕(2000—),女,硕士研究生。

Digital Light Processing of Cross-Scale Porous Zirconia Ceramics
Shuo YAN , Chonggao BAO , Shijia LI, Wencai DONG, Haohong QIU
Affiliations
  • State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China
  • Corresponding Author:
    BAO Chonggao (1965-), male, Ph.D., Professor. E-mail:

    YAN Shuo (2000-), female, Master Candidate. E-mail:

出版时间: 2025-09-20 doi: 10.14062/j.issn.0454-5648.20250041
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采用基于立体光固化数字光处理技术(DLP)结合造孔剂法,制备多维孔隙结构氧化钇稳定的四方晶体氧化锆陶瓷(3Y-TZP陶瓷)。为了提升光固化陶瓷浆料的可打印性,系统探讨了分散剂种类和含量对浆料流变性的影响,并分析了分散剂的作用机理。此外,还研究了固含量及有机液态造孔剂聚乙二醇(PEG)400含量对3Y-TZP陶瓷浆料流变行为的影响。结果表明:3%(质量分数)的KOS110对改善氧化锆陶瓷浆料的流变行为效果最佳。PEG400可以游离于氧化锆陶瓷颗粒之间或部分吸附于陶瓷颗粒表面,当添加量为10%(体积分数)时能够使颗粒间形成有效的润滑层,改善浆料的流变性能。优化后的3Y-TZP陶瓷浆料固含量为50%,光固化打印得到层间结合良好的复杂结构陶瓷生坯,经1500 ℃保温2 h后,复杂宏孔结构烧结试样兼具合适的孔隙率和强度,显气孔率4.03%,抗弯强度达717 MPa。

氧化锆  /  光固化成型技术  /  多孔陶瓷  /  造孔剂  /  流变行为
Introduction

3% yttria-stabilized tetragonal phase zirconia ceramics (3Y-TZP) show a significant potential in aerospace application due to their low thermal conductivity, excellent high-temperature stability, and mechanical strength. However, it is difficult for conventional forming methods of porous ceramics to meet the requirements for complex structural designs. Digital Light Processing (DLP) is an important additive manufacturing method to fabricate components with complex geometries and high-precision, which can balance micron-scale resolution and efficient production. The macro-microporous structure of multiscale porous ceramics can take full advantage of multilevel porosity advantages, balancing thermal insulation and mechanical properties. Therefore, in this paper, DLP technology was combined with the pore-forming agent method to achieve the controllable molding of zirconia ceramics with multilevel pores. The printability of high solid-loading porous ceramic slurry was optimized, and the effect of sintering temperature on the microstructural evolution and mechanical properties of ceramics was investigated.

Methods

The ceramic slurry was prepared through batched addition of ball-milled and dried 3Y-TZP powder into a photosensitive resin premix, followed by thorough homogenizationin a model DSG2300Z homogenizer at 1200 r/min. 3Y-TZP slurries with 40% solid loading were prepared with different dispersants. Their rheological behavior was analyzed by a model MCR302 rheometer to identify the optimal dispersant type and content. Subsequently, the slurries with different solid loadings were prepared, and the appropriate solid loading was selected. Based on the optimized parameters, liquid organic pore-forming agent (i.e., polyethylene glycol (PEG) 400) was added at different volume fractions of 5%, 10%, and 15% to replace of the equivalent resin volume fractions. The optimal slurry composition was determined by rheological property.

The green body was prepared using a DLP printer with 405 nm UV light to cure the resin. The argon debinding and air decarbonization-sintering combined processes were then determined by thermogravimetry-differential scanning calorimetry (TG-DSC) on the green body. The ceramic components were subsequently held at different sintering temperatures (i.e., 1400, 1450, 1500 ℃) for 2 h, respectively. The microstructures of 3Y-TZP powder, green body, and sintered ceramics were determined by field-emission scanning electron microscopy (MAIA3 LMH, Tescan Co., Czech Republic). The chemical composition of the ceramic powders and dispersant was characterized using Fourier infrared spectrometry (IRPrestige-21, Shimadzu Co., Japan). The phase composition was analyzed by X-ray diffraction (d8 advance, Bruker Co., Germany). Three-point bending tests were conducted on ceramic specimens (50 mm×5 mm×4 mm) to evaluate the mechanical strength. The span was 20 mm and the load loading rate was 0.5 mm·min-1. The microstructural porosity was measured by Archimedes water displacement method.

Results and discussion

In this study, the slurry formulation for porous zirconia ceramics is optimized. Compared with dispersants KH560 and Solsperse41000, a dispersant KOS110 effectively reduces slurry viscosity. The infrared spectroscopy analysis reveals that KOS110 undergoes esterification reactions with zirconia particles through hydroxyl groups(-OH), thereby enhancing the dispersion of ceramic particles. The slurry viscosity initially decreases and then increases as the content of KOS110 increases, and reaches the lowest value at 3% addition. The yield stress and K value of the slurry are lowest when 3% KOS110 is added, proving that the rheological behavior of the slurry is optimal at this time. Increasing solid loading reduces interparticle distances in the dispersed slurry. When solid content exceeds 50%, the viscosity increases dramatically. Therefore, 50% solid loading can ensure a printability and a high solid content.

The introduction of PEG into 3Y-TZP slurry can form lubricating layers between ceramic particles through free molecular movement, improving the dispersion of the slurry. The optimal rheological performance is achieved at 10% PEG addition. The optimized high-solid 3Y-TZP slurry demonstrates a superior formability, which can be used to print 3Y-TZP hierarchical porous ceramic green body. When the sintering temperature increases from 1400 ℃ to 1500 ℃, the ceramic particles gradually transition from loose to tightly packed arrangement, accompanied by porosity reduction. After sintering at 1500 ℃, the ceramic samples have both appropriate porosity and strength. The flexural strength reaches 717 MPa and the porosity is 4.03%. The XRD patterns show that the ceramic crystal phase is a stable tetragonal phase after sintering at this temperature.

Conclusions

3Y-TZP ceramics with a multidimensional pore structure were prepared by DLP technology combined with the pore-forming agent method. The effects of dispersant type and content on the rheological behavior of ceramic slurries with 40% solid content were investigated. The results indicated that 3% mass fraction of KOS110 could effectively improve the rheology of the slurry due to the chemical bonding and steric hindrance. The solid content and PEG content were synergistically optimized. The results showed that an effective lubrication layer could be formed between ceramic particles when 10% PEG was added to replace the photosensitive resin at 50% solid content. The viscosity of the slurry at this time met the requirements for DLP printing. After DLP printing and high temperature sintering at 1500 ℃, the 3Y-TZP ceramic was structurally stable and had both high appropriate porosity and mechanical strength.

zirconia  /  digital light processing  /  porous ceramics  /  pore former  /  rheological behavior
闫硕, 鲍崇高, 李世佳, 董文彩, 邱皓泓. 光固化成型工艺制备跨尺度多孔结构氧化锆陶瓷. 硅酸盐学报, 2025 , 53 (9) : 2696 -2705 . DOI: 10.14062/j.issn.0454-5648.20250041
Shuo YAN, Chonggao BAO, Shijia LI, Wencai DONG, Haohong QIU. Digital Light Processing of Cross-Scale Porous Zirconia Ceramics[J]. Journal of the Chinese Ceramic Society, 2025 , 53 (9) : 2696 -2705 . DOI: 10.14062/j.issn.0454-5648.20250041
  • 国家自然科学基金(52075425)
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doi: 10.14062/j.issn.0454-5648.20250041
  • 接收时间:2025-01-15
  • 首发时间:2026-10-21
  • 出版时间:2025-09-20
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  • 收稿日期:2025-01-15
  • 修回日期:2025-02-14
基金
国家自然科学基金(52075425)
作者信息
    西安交通大学,金属材料强度国家重点实验室,西安 710049

通讯作者:

鲍崇高(1965—),男,博士,教授。
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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