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采用固相法利用绿泥石制备了低膨胀堇青石陶瓷，系统探究了烧成温度与添加剂含量对材料晶相演变及性能的影响。结果表明：未添加剂样品在1150～1250℃以石英/镁铝尖晶石为主相，1300℃以上才出现堇青石相转化；而引入质量分数4%～16%的CeO2-Bi_2O3混合添加剂可使堇青石合成温度降低100℃，其中，引进16%添加剂在1350℃时即可实现杂相近完全抑制。当添加剂含量12%～16%时，合成温度为1350℃时，样品表现出较优抗弯强度(56.88～60.79 MPa)和较低热膨胀系数(1.95×10-6～2.17×10-6/℃)，相对于未添加样品的热膨胀系数降低了41%～47%。XRD与SEM证实复合添加剂通过促进离子迁移作用，显著提升致密度并优化晶相组成，该材料体系在蜂窝陶瓷载体领域展现出重要应用潜力。
Abstract：Low-expansion cordierite ceramics were synthesized via a solid-state method using chlorite, with a systematic investigation into the effects of sintering temperature and additive content on phase evolution and material properties. The results demonstrated that samples without additives primarily contained quartz and magnesium-aluminum spinel phases at 1150 ～ 1250 ℃, achieving cordierite phase transformation only above 1300 ℃. Remarkably, the introduction of 4% ～ 16% CeO2-Bi_2O3 reduced the cordierite synthesis temperature by 100 ℃, with 16 wt% additives achieving near-complete suppression of impurity phases at 1350 ℃. Optimal performance was observed at 12% ～ 16% additive content, where samples sintered at 1350 ℃ exhibited enhanced flexural strength(56.88 ～ 60.79 MPa) and reduced thermal expansion coefficients(1.95×10-6/℃～ 2.17×10-6/℃), representing a 41% ～ 47% reduction compared to additive-free specimens. XRD and SEM analyses confirmed that the composite additives facilitated ion migration, significantly improving densification and optimizing phase composition. This material system demonstrates promising potential for applications in honeycomb ceramic substrates.
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基本信息:
DOI：10.16521/j.cnki.issn.1001-9642.2026.07.004
中图分类号:TQ174.1
引用信息:
[1]窦方波,包启富,董伟霞,等.绿泥石固废资源制备堇青石陶瓷及其性能优化[J].中国陶瓷,2026(07):28-35.DOI:10.16521/j.cnki.issn.1001-9642.2026.07.004.
基金信息:
江西省自然科学基金重大项目(20232ACB204017)
2026-06-25
2026-06-25
2026-06-25