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BULLETIN OF THE CHINESE CERAMIC SOCIETY ›› 2026, Vol. 45 ›› Issue (2): 603-612.DOI: 10.16552/j.cnki.issn1001-1625.2025.0816

• Ceramics • Previous Articles     Next Articles

Preparation and Properties Regulation of Tubular Halloysite Doped Cordierite Ceramics

PAN Honghai(), ZHANG Wen, WANG Honglei(), ZHOU Xingui   

  1. Science and Technology on Advanced Ceramic Fibers and Composites Laboratory,College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,China
  • Received:2025-08-12 Revised:2025-09-07 Online:2026-02-20 Published:2026-03-09
  • Contact: WANG Honglei

Abstract:

Cordierite ceramics are ideal materials for lithography square mirrors and laser reflectors due to their low thermal expansion coefficient, excellent chemical stability and high mechanical properties. In order to meet the more stringent application requirements in related fields, it is necessary to modulate the key parameters such as thermal expansion coefficient and elastic modulus by means of doping modification. Tubular halloysite has excellent thermal stability and mechanical properties due to its unique tubular structure, showing its good potential as a dopant. In this paper, cordierite ceramics doped with tubular halloysite were prepared by solid phase sintering with tubular halloysite powder as dopant. The effect of tubular halloysite doping on the composition, microstructure, mechanical properties and thermal expansion properties of cordierite ceramics was studied. The results show that doping tubular halloysite can promote the densification of cordierite ceramics to a certain extent. With the increase of tubular halloysite doping mass fraction, the density of cordierite ceramics increases and the open porosity decreases. The 10.0% tubular halloysite-doped cordierite ceramics have the highest elastic modulus, and the 20.0% tubular halloysite-doped cordierite ceramics have the highest hardness. Compared with pure cordierite ceramics, the average thermal expansion coefficient of cordierite ceramics doped with 2.5% tubular halloysite decreases from 1.40×10-6 K-1 to 0.65×10-6 K-1 at room temperature (25 ℃) to 160 ℃.

Key words: cordierite, tubular halloysite, doping modification, microstructure, thermal expansion, mechanical property

CLC Number: