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Highly Donor-Doped LaxBaxTiO3 Ceramics
NatalyKorobova,Dae-WhaSoh 한국전기전자재료학회 2003 Transactions on Electrical and Electronic Material Vol.4 No.4
Sol-gel processing of BaTiO3 ceramics doped with La(0.01~1.00 at.%) were prepared from metal barium, titanium n-butoxide and lanthanum iso-propoxide. Characterization of the sol-gel-derived powder using XRD, SEM is also reported. The obtained results showed that insulator to semiconductor transition for highly donor-doped barium titanate was closely related to the incorporation of donor into the grains and to the resultant grain size, which were significantly affected by the sinterability of BaTiO3 powders and sintering conditions used.
Immobilization of Alchidine on Polyvinyl Alcohol Gels
M.K.Beisebekov,A.K.Toktabaeva,Zh.A.Abilov,G.Sh.Burasheva,Dae-whaSoh 한국전기전자재료학회 2003 Transactions on Electrical and Electronic Material Vol.4 No.1
The regularities of immobilization of natural medicinal substances - alchidine on gels of poly(vinyl alcohol) - are investigated. It is shown that the polymer components of alchidine interact with nonionic polymer with formation of interpolymer complexes. The influence of the different factors on the properties of complexes is considered and the constants of alchidine distribution in the system gel - water are calculated.
G.AMun,Z.S.Nurkeeva,V.A.Kovtunets,A,I,Kupchishin,G.T.Akhmetkalieva,V.V.Khutoryanskiy,Al-SayedA.A.,Dae-WhaSoh 한국전기전자재료학회 2003 Transactions on Electrical and Electronic Material Vol.4 No.3
Radiation technology is an effective way for regulating polymeric materials to physicochemical and mechanical properties. New polymeric hydrogels based on vinyl ethers have been synthesized by the γ-initiated polymerization method. In this paper, we have studied the effect of radiation on mechanical and electrochemical properties of new rubber-like polymeric composite materials based on polyvinylether of ethyleneglycol (PVEEG).