Вы здесь

Funct. Mater. 2019; 26 (1): 174-181.

doi:https://doi.org/10.15407/fm26.01.174

Radio-transparent ceramic materials of spodumene-cordierite composition

A.V.Zaichuk1, A.A.Amelina1, Y.V.Karasik1, Y.S.Khomenko1, V.A.Lementareva1, D.Yu.Saltykov2

1State Higher Educational Institution &qout;Ukrainian State University of Chemical Technology&qout;, 8 Haharina Ave., 49005 Dnipro, Ukraine
2O.Honchar Dnipro National University, 72 Haharina Ave., 49010 Dnipro, Ukraine

Abstract: 

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.

Keywords: 
radio-transparent ceramic materials, spodumene, cordierite, glass phase, crystallization, physical and technical properties.
References: 

1. Yu.E.Pivinsky, E.I.Suzdaltsev, Heat-power Engineer, Moscow (2008) [in Russian].

2. N.E.Uvarova, D.V.Graschenkov, N.V.Isaeva et al., J. Aviat. Mater. Tech., 1, 16 (2010).

3. E.N.Kablov, D.V.Graschenkov, N.V.Isaeva et al., Glass and Ceramics, 4, 7 (2012).

4. U.S.Corning, E.D.Zanotto, J. Am. Ceram. Soc. Bull., 89, 19 (2010).

5. A.V.Zaychuk, A.A.Amelina, Voprosy Khimii i Khimich. Tekhn., 6, 63 (2017).

6. E.S.Khomenko, E.V.Karasik, V.I.Goleus, Functional Materials, 24, 593 (2017). https://doi.org/10.15407/fm24.04.593

7. P.D.Sarkisov, D.V.Graschenkov, L.A.Orlovaet et al., Techn. Techn. Silicates, 16, 2 (2009).

8. E.I.Suzdal'tsev, T.I.Rozhkova, Refractories and Indust. Ceramics, 44, 260 (2003). https://doi.org/10.1023/A:1027343818027

9. A.Zaychuk, C.Dimitrov, A.Amelina, D.Wedmid, Rusenskaya University &qout;Angel Kanchev&qout;, Ser. 10.1 Chemistry Technology, 56, 96 (2017).

10. Z.Shamsudin, A.Hodzic, C.Soutis et al., J. Mater. Sci., 46, 5822 (2011). https://doi.org/10.1007/s10853-011-5538-0

11. O.V.Savvova, S.M.Logvinko, O.V.Babich, A.R.Zdorik, Voprosy Khimii i Khimich. Tekhn.., 3, 96 (2018).

12. K.H.Kim, F.A.Hummelin, Book Introduction to Phase Equilibria in Ceramic Systems, Basel, New York (1984).

13. M.V.Andreev, O.O.Drobakhin, Ye.N.Privalov, D.Yu.Saltykov, Telecommun. and Radio Engin., 73, 1017 (2014). https://doi.org/10.1615/TelecomRadEng.v73.i11.70

.

Current number: