Funct. Mater. 2018; 25 (4): 823-828.
Physicochemical regularities of a high-voltage electroporcelain formation with a sintering temperature of 1200°C
National Technical University Kharkiv Polytechnic Institute, 2 Kirpicheva Str., 61002 Kharkiv, Ukraine
The composition and technological parameters of manufacturing low-temperature electroporcelain with complex of high electrophysical and mechanical properties have been developed. With the use of differential thermal, X-ray phase, IR spectroscopic and electron microscopic methods of analysis, physicochemical regularities in the formation of electrical porcelain at 1200°C have been established. It is shown that high dielectric and mechanical characteristics of low-temperature porcelain (ρV = 4.1·1014 Ohm·cm; E = (29-30) kV·mm-1; tgδ·103 = 12.11; σr = 31 MPa) are provided by activating the sintering with the participation of a modified feldspar melt and intensive formation of the mullite phase in the form of microfibers with a predominant size of ~ 0.007-8 &mu>m with the addition of complex mineralizer additives (12 wt.% pyrophyllite and 0.3 wt.% titanium dioxide).
1. I.V.Synyakovskaya, V.V.Zajkov, Pyrophyllite Raw Materials of the Kul-Yurt-Tau Deposit, Uro RAN, Ekaterinburg (2010).
2. V.S.Bakunov, A.R.Murzakova, R.U.Shajahmetov et al., Steklo i Keramika, 12, 23 (2011).
3. T.K.Mukhopadhyay, S.Ghatak, H.S.Maiti, Ceram. Int., 35, 1493 (2009). https://doi.org/10.1016/j.ceramint.2008.08.002
4. E.S.Abdrakhimova, V.Z.Abdrakhimov, Zh. Neorgan. Khimii, 52, 345 (2007).
5. E.Y.Fedorenko, M.I.Ryshchenko, E.B.Daineko et al., Glass Ceram., 70, 1 (2013). https://doi.org/10.1007/s10717-013-9547-0
6. O.E.Baluta, Ja.V.Cimbaljuk, in: Book Abstr. Inter-branch Sci.-pract. Meet. on Development of Ceramic Production, Kyiv, Ukraine (2007), p.39.
7. M.I.Ryshchenko, E.Ju.Fedorenko, M.A.Chirkina, Steklo i Keramika, 11, 26 (2009).
8. E.B.Daineko, A.M.Juminov, N.Ju.Glushhenko et al., in: Book 20th Sci. Youth School on Metallogeny of the Ancient and Modern Oceans, Miass, Russia (2014), p.275.
9. G.N.Maslennikova, Ju.T.Platov, Steklo i Keramika, 2, 19 (1998).
10. V.I.Vereshhagin, Steklo i Keramika, 12, 6 (2002).
11. T.V.Vakalova, A.A.Reshetova, Ogneupory i Tekhn. Keramika, 7-8, 74 (2009).
12. E.B.Daineko, E.Yu.Fedorenko, M.I.Ryshchenko, Ekologiya i Promyishlennost', 4, 78 (2016)
.