硅酸盐通报 ›› 2026, Vol. 45 ›› Issue (9): 3280-3288.DOI: 10.16552/j.cnki.issn1001-1625.2026.0124
收稿日期:2026-02-02
修订日期:2026-03-30
出版日期:2026-09-15
发布日期:2026-10-09
通信作者:
田玉明,博士,教授。E-mail:tym1654@126.com作者简介:玄松桐(1996—),男,博士,讲师。主要从事陶瓷材料的研究。E-mail:xsttykjdx@163.com
基金资助:
XUAN Songtong1(
), KONG Xiangchen2, WANG Kaiyue2, TIAN Yuming2(
)
Received:2026-02-02
Revised:2026-03-30
Published:2026-09-15
Online:2026-10-09
摘要:
为制备高性能镁铝尖晶石结构陶瓷,本文以铝矾土和菱镁矿为原料,软锰矿为添加剂,采用固相烧结法制备MgAl2O4陶瓷,研究了添加剂对尖晶石结构的影响,阐释了锰离子对杂相的作用规律,揭示了锰离子扩散效应增强MgAl2O4材料致密性和力学性能的机理。结果表明,向天然原料中添加软锰矿后,Mn2+固溶至MgAl2O4晶格中,形成(Mn x Mg1-x )Al2O4固溶体,该固溶体减弱了Kirkendall效应,降低了尖晶石生成过程中MgO一侧的气孔率,增强了Mg2+的扩散传质速率,从而提升了材料的致密性和抗折强度。同时,Mn2+与钙长石的反应生成钙锰辉石和Al2O3,引起了辉石晶格畸变,增加了晶格缺陷浓度,提升了离子扩散速率。当软锰矿添加量达到3%(质量分数)时,材料的性能最优,体积密度达到3.29 g/cm3,显气孔率降至0.24%,抗折强度增至140.2 MPa。
中图分类号:
玄松桐, 孔祥辰, 王凯悦, 田玉明. 锰离子扩散增强镁铝尖晶石陶瓷结构和力学性能研究[J]. 硅酸盐通报, 2026, 45(9): 3280-3288.
XUAN Songtong, KONG Xiangchen, WANG Kaiyue, TIAN Yuming. Structure and Mechanical Properties of Magnesium Aluminum Spinel Ceramics Strengthened by Manganese Ion Diffusion[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2026, 45(9): 3280-3288.
| Mass fraction/% | ||||||||
|---|---|---|---|---|---|---|---|---|
| Al2O3 | MgO | SiO2 | Fe2O3 | TiO2 | CaO | MnO2 | LOI | |
| 74.30 | — | 6.00 | 2.00 | 2.60 | — | — | 15.10 | |
| 0.43 | 41.25 | 7.37 | 0.58 | — | 5.00 | — | 45.37 | |
| 1.11 | — | 10.94 | 9.21 | — | — | 35.61 | 43.13 | |
表1 原料化学成分
Table 1 Chemical composition of raw material
| Mass fraction/% | ||||||||
|---|---|---|---|---|---|---|---|---|
| Al2O3 | MgO | SiO2 | Fe2O3 | TiO2 | CaO | MnO2 | LOI | |
| 74.30 | — | 6.00 | 2.00 | 2.60 | — | — | 15.10 | |
| 0.43 | 41.25 | 7.37 | 0.58 | — | 5.00 | — | 45.37 | |
| 1.11 | — | 10.94 | 9.21 | — | — | 35.61 | 43.13 | |
| Sample | Mass fraction/% | ||
|---|---|---|---|
| Bauxite | Magnesite | Pyrolusite | |
| MA-Mn0 | 58.60 | 41.40 | — |
| MA-Mn1 | 58.01 | 40.99 | 1 |
| MA-Mn3 | 56.84 | 40.16 | 3 |
| MA-Mn5 | 55.67 | 39.33 | 5 |
表2 不同试样中的原料占比
Table 2 Mix ratio of raw materials in different samples
| Sample | Mass fraction/% | ||
|---|---|---|---|
| Bauxite | Magnesite | Pyrolusite | |
| MA-Mn0 | 58.60 | 41.40 | — |
| MA-Mn1 | 58.01 | 40.99 | 1 |
| MA-Mn3 | 56.84 | 40.16 | 3 |
| MA-Mn5 | 55.67 | 39.33 | 5 |
图4 MA-Mnx试样在1 400 ℃下烧结的XRD谱和MA(311)晶面的XRD放大谱
Fig.4 XRD patterns of MA-Mnx samples sintered at 1 400 ℃ and XRD enlarged patterns of MA(311) crystal plane
| Sample | MA-Mn0 | MA-Mn1 | MA-Mn3 | MA-Mn5 |
|---|---|---|---|---|
| Lattice constant/Å | 8.085 44 | 8.085 87 | 8.086 55 | 8.086 71 |
表3 MA-Mnx试样(x=0、1、3、5)中MA相的晶格常数
Table 3 Lattice constants of MA phase in MA-Mnx samples (x=0, 1, 3, 5)
| Sample | MA-Mn0 | MA-Mn1 | MA-Mn3 | MA-Mn5 |
|---|---|---|---|---|
| Lattice constant/Å | 8.085 44 | 8.085 87 | 8.086 55 | 8.086 71 |
| Sample | Atomic fraction/% | ||||||
|---|---|---|---|---|---|---|---|
| Mg | Al | O | Si | Fe | Ca | Mn | |
| MA-Mn0 | 13.19 | 28.40 | 54.30 | 2.58 | 0 | 1.53 | 0 |
| MA-Mn1 | 15.24 | 29.38 | 53.43 | 2.58 | 0.87 | 0 | 0.69 |
| MA-Mn3 | 14.14 | 27.27 | 53.02 | 2.24 | 0.35 | 1.04 | 1.30 |
| MA-Mn5 | 14.49 | 29.31 | 53.50 | 0.58 | 0.07 | 0.25 | 1.45 |
表4 在1 400 ℃下烧结MA-Mnx试样中MA晶粒的EDS分析
Table 4 EDS analysis of MA grains in MA-Mnx samples sintered at 1 400 ℃
| Sample | Atomic fraction/% | ||||||
|---|---|---|---|---|---|---|---|
| Mg | Al | O | Si | Fe | Ca | Mn | |
| MA-Mn0 | 13.19 | 28.40 | 54.30 | 2.58 | 0 | 1.53 | 0 |
| MA-Mn1 | 15.24 | 29.38 | 53.43 | 2.58 | 0.87 | 0 | 0.69 |
| MA-Mn3 | 14.14 | 27.27 | 53.02 | 2.24 | 0.35 | 1.04 | 1.30 |
| MA-Mn5 | 14.49 | 29.31 | 53.50 | 0.58 | 0.07 | 0.25 | 1.45 |
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