Research on Effects of Type and Amount of Fillers, Zirconium- and Silica-containing Components on Properties of Alumina-zirconia-silicate Crucibles

doi:10.19691/j.cnki.1004-4493.2025.04.001

China's Refractories ›› 2025, Vol. 34 ›› Issue (4): 1-5.DOI: 10.19691/j.cnki.1004-4493.2025.04.001

Research on Effects of Type and Amount of Fillers, Zirconium- and Silica-containing Components on Properties of Alumina-zirconia-silicate Crucibles

Valeriy V. MARTYNENKO^*, Iryna G. SHULYK, Yuliya Ye. MISHNYOVA

JSC Ukrainian Research Institute of Refractories named after A.S. Berezhnoy, Kharkiv 61024, Ukraine

Online:2025-12-15 Published:2026-01-04
Contact: *e-mail: martynenko.ukrniio@gmail.com
About author:Dr Valeriy Martynenko is the director of the Ukrainian Research Institute of Refractories, which is named after the renowned scientist Anatoliy S. Berezhnoy. Dr Martynenko has worked at the institute for over 50 years, conducting research on alumina, zirconia, chromia and silica refractories and their industrial applications. He has published over 500 scientific works and holds 60 patents. Dr Martynenko is a member of the American Ceramic Society as well as a member of the editorial board of Refractories Worldforum (Germany) and China’s Refractories (China). He is also the editor-in-chief of the collection of scientific papers“Scientific Research on Refractories and Technical Ceramics”, which is published by the institute every year.

Abstract

Abstract: Research on the effects of the amount of fillers in the form of fused alumina, mullite, and tabular alumina, zirconium-containing and silica-containing components of the batches in the form of zircon and silica sand on the properties of alumina-zirconia-silicate (AZS) refractories was conducted. It was found that the introduction of 16% zircon into the composition of samples with fillers such as fused alumina and mullite, as well as tabular alumina, results in an increase in their density, strength, and thermal shock resistance. Petrographic studies have revealed the formation of a multiphase, microcracked structure in these samples, which accounts for the improvement in their properties. The optimal composition of a batch containing a filler of tabular alumina, a finely dispersed matrix of α-alumina, 16% zircon, and 7% silica sand has been determined, which ensures the production of AZS refractories with high bulk density, cold crushing strength, and thermal shock resistance. Research on the plastic strength of the structure of optimal composition AZS mass, depending on its storage time, was conducted. It was found that up to 24 h of storage, the mass is characterized by low plastic strength. It indicates its suitability for use in the vibration casting technology of products. Storage of the mass for more than 24 h leads to an increase in the plastic strength of its structure, which reaches a maximum after 56 h of storage. The developed composition of the batch is recommended for the manufacture of AZS crucibles for induction melting of heat-resistant alloys.

Key words: alumina-zirconia-silicate vibrocast crucibles, fused alumina, fused mullite, tabular alumina, zircon, silica, plastic strength of structure, thermal shock resistance

Valeriy V. MARTYNENKO, Iryna G. SHULYK, Yuliya Ye. MISHNYOVA. Research on Effects of Type and Amount of Fillers, Zirconium- and Silica-containing Components on Properties of Alumina-zirconia-silicate Crucibles[J]. China's Refractories, 2025, 34(4): 1-5.

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Research on Effects of Type and Amount of Fillers, Zirconium- and Silica-containing Components on Properties of Alumina-zirconia-silicate Crucibles

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