Radio-transparent ceramic materials of spodumene-cordierite composition
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Radio-transparent ceramic materials of spodumene-cordierite composition
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| Creator |
Zaichuk, A.V.
Amelina, A.A. Karasik, Y.V. Khomenko, Y.S. Lementareva, V.A. Saltykov, D.Yu. |
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| Subject |
Technology
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| Description |
The paper deals with the processes of obtaining radio-transparent ceramic materials with a complex of high physical and chemical indices. Directional regulation of the ceramics' microstructure and phase composition was carried out by introducing Li₂O-Al₂O₃-B₂O₃-SiO² (LABS) glass into main matrix that consisted of cordierite phase. Optimal composition and temperature conditions for firing of the developed spodumene-cordierite ceramics were established. It is shown that the introduction of LABS glass into experimental compositions contributes to significant intensification of the process of formation of α-cordierite crystalline phase, as well as sintering of ceramic materials obtained. Besides, the product of crystallization of parent glass is β-spodumene which promotes the reduction of CLTE of the obtained ceramic material, on average, to (12.4-17.8)·10⁻⁷ deg⁻¹. The highest indices of mechanical compressive strength (165.8-202.6 MPa) and thermal stability (not lower than 1050 °C) are achieved at the most rational content of LABS glass is 10-20 wt. %. Under this composition the water absorption is within 0.28-0.34 %, apparent density 2.16-2.18 g/cm³, CLTE (16.6-17.8)·10⁻⁷ deg⁻¹. Studies of electrophysical properties of the developed material at the frequency of 10¹⁰ Hz showed that the level of the dielectric constant (ε = 3.8) and dielectric losses (tg δ = 0.0014) spodumene-cordierite ceramics synthesized at reduced temperature of 1300-1350 °C are fully complied with the requirements to the modern radio-transparent materials.
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| Date |
2019-06-20T03:25:02Z
2019-06-20T03:25:02Z 2019 |
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| Type |
Article
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| Identifier |
Radio-transparent ceramic materials of spodumene-cordierite composition / A.V. Zaichuk, A.A. Amelina, Y.V. Karasik, Y.S. Khomenko, V.A. Lementareva, D.Yu. Saltykov // Functional Materials. — 2019. — Т. 26, № 1. — С. 174-181. — Бібліогр.: 13 назв. — англ.
1027-5495 DOI:https://doi.org/10.15407/fm26.01.174 http://dspace.nbuv.gov.ua/handle/123456789/157413 |
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| Language |
en
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| Relation |
Functional Materials
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| Publisher |
НТК «Інститут монокристалів» НАН України
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