TiO2加入量对光固化打印成型Al2O3陶瓷性能的影响

doi:10.3969/j.issn.1001-1935.2022.02.004

耐火材料 ›› 2022, Vol. 56 ›› Issue (2): 112-116.DOI: 10.3969/j.issn.1001-1935.2022.02.004

TiO₂加入量对光固化打印成型Al₂O₃陶瓷性能的影响

王瑞(), 杨道媛(), 原会雨, 崔俊艳

郑州大学材料科学与工程学院河南郑州 450001

收稿日期:2021-05-24 出版日期:2022-04-15 发布日期:2022-04-21
通讯作者: 杨道媛,女,1968年生,博士,教授。E-mail: 873906048@qq.com
作者简介:王瑞:女,1994年生,硕士研究生。E-mail: 1506825633@qq.com
基金资助:
国家自然科学基金项目(51372229);国家重点研发专项项目(2017YFB0310701);河南省科技创新杰出人才基金项目(17420051001);郑州市重大专项(2019CXZX0066)

Effect of TiO₂ addition on properties of Al₂O₃ ceramics prepared by digital light printing (DLP)

Wang Rui(), Yang Daoyuan(), Yuan Huiyu, Cui Junyan

School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,Henan,China

Received:2021-05-24 Online:2022-04-15 Published:2022-04-21
Contact: Yang Daoyuan

摘要/Abstract

摘要：

以光敏丙烯酸树脂与分散剂SP-710为液相,以d₅₀=2.38 μm的Al₂O₃粉和添加剂TiO₂粉为固相,制备了固含量为78%(w)的Al₂O₃陶瓷浆料。采用数字光固化成型技术(DLP)打印Al₂O₃陶瓷素坯,经1 450、1 500、1 550、1 600 ℃保温4 h烧后,分析TiO₂加入量(质量分数分别为0、1%、2%、3%、5%)对Al₂O₃陶瓷试样性能的影响。结果表明:TiO₂的加入可促进Al₂O₃陶瓷的烧结,显著提高致密性,降低烧结温度,并确定TiO₂最优掺量为3%(w),烧结温度最优为1 600 ℃,此时试样在x轴、y轴、z轴的收缩率分别为15.7%、15.8%与23.8%,显气孔率为2.41%,体积密度为3.74 g·cm^-3,三点弯曲强度为251.1 MPa,与未添加TiO₂的Al₂O₃陶瓷对比,体积密度提高了0.56 g·cm^-3,显气孔率由20.19%降低为2.41%,三点弯曲强度增大为原来的2.5倍。因此,加入适量TiO₂,可以有效提高DLP打印陶瓷体的致密度与强度,使打印试样的性能接近压制成型的试样,有望使打印工艺应用于耐火材料领域。

关键词: 数字光固化成型技术, Al₂O₃陶瓷, 强度, 体积密度, 烧结助剂

Abstract:

Ceramic slurry of 78 mass% solid loading was prepared using photosensitive acrylic resin and dispersant SP-710 as the liquid phase,Al₂O₃ powder (d₅₀=2.38 μm) and TiO₂ powder additive as the solid phase.Alumina ceramics were prepared by DLP,sintering for 4 h at 1 450,1 500,1 550 or 1 600 ℃,respectively.The effects of the TiO₂ addition (0,1%,2%,3% and 5%,by mass) on the properties of the ceramics were studied.The results show that the addition of TiO₂ can improve the sintering of Al₂O₃ ceramics,significantly improve the densification,and reduce the sintering temperature.With the optimum TiO₂ addition of 3 mass% and the optimum sintering temperature of 1 600 ℃,the obtained Al₂O₃ ceramics have shrinkage of 15.7%,15.8% and 23.8% at the x axis,the y axis,and the z axis,respectively,the porosity of 2.41%,the bulk density of 3.74 g·cm^-3 and the three-point bending strength of 251.1 MPa.Compared with the undoped alumina ceramics,the doped alumina ceramic has increased bulk density by 0.56 g·cm^-3,decreased apparent porosity from 20.19% to 2.41%,and the three-point bending strength increases by 2.5 times.Therefore,the density and strength of DLP prepared ceramics can be improved effectively by adding an appropriate addition of TiO₂,and the performance of the DLP prepared ceramics is close to that of the pressed samples.Thus,it is hopeful to apply DLP in refractories field.

Key words: digital light printing, alumina ceramics, strength, bulk density, sintering aid

中图分类号:

TQ175.4

王瑞, 杨道媛, 原会雨, 崔俊艳. TiO₂加入量对光固化打印成型Al₂O₃陶瓷性能的影响[J]. 耐火材料, 2022, 56(2): 112-116.

Wang Rui, Yang Daoyuan, Yuan Huiyu, Cui Junyan. Effect of TiO₂ addition on properties of Al₂O₃ ceramics prepared by digital light printing (DLP)[J]. Refractories, 2022, 56(2): 112-116.

图/表 9

表1 试样配比

Table 1 Formulations of specimens

原料	w/%
原料	0#	1#	2#	3#	5#
α-Al₂O₃粉	78	77	76	75	73
光敏丙烯酸树脂	19.66	19.66	19.66	19.66	19.66
SP-710	2.34	2.34	2.34	2.34	2.34
TiO₂粉	0	1	2	3	5

图1 DLP成型打印示意图

Fig.1 Schematic diagram of DLP

图2 掺入不同含量TiO2的试样经1 600 ℃烧后的XRD图谱

Fig.2 XRD patterns of samples with different TiO2 additions fired at 1 600 ℃

图3 TiO2含量对Al2O3陶瓷经1 600 ℃保温4 h烧后显微结构的影响

Fig.3 Microstructure of Al2O3 ceramics with different TiO2 additions fired at 1 600 ℃ for 4 h

图4 烧结温度对TiO2掺入量为3%(w)的试样显微结构的影响

Fig.4 Effect of sintering temperature on the microstructure of ceramics with 3% TiO2

图5 掺入不同含量TiO2的试样经1 600 ℃保温4 h烧后的三维方向的收缩率

Fig.5 Three-dimensional shrinkage of samples with different TiO2 additions fired at 1 600 ℃ for 4 h

图6 掺入3%(w)TiO2的试样经不同温度烧后的线收缩率

Fig.6 Three-dimensional shrinkage of samples with 3% TiO2 fired at different temperatures

图7 TiO2含量与烧结温度对Al2O3陶瓷体积密度和显气孔率影响

Fig.7 Effect of TiO2 addition and sintering temperature on bulk density and apparent porosity of Al2O3 ceramics

图8 TiO2含量与烧结温度对Al2O3陶瓷三点弯曲强度影响

Fig.8 Effect of TiO2 addition and sintering temperature on three-point bending strength of Al2O3 ceramics

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TiO₂加入量对光固化打印成型Al₂O₃陶瓷性能的影响

Effect of TiO₂ addition on properties of Al₂O₃ ceramics prepared by digital light printing (DLP)

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