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  1. No Access

    Article

    Low-Temperature Aging of Al2O3–[ZrYb]O2 Composites Containing Strontium Hexaaluminate

    The effect of the hydrothermal treatment corresponding to accelerated low-temperature aging and simulating a prolonged exposure to a biological environment on the phase composition and bending strength of Al2O3–[...

    L. I. Podzorova, A. A. Il’icheva, O. I. Pen’kova… in Inorganic Materials: Applied Research (2023)

  2. No Access

    Article

    Alpha-Alumina/Tetragonal Zirconia Composites Modified with Strontium Cations

    Composites have been prepared using nanopowders whose precursors were synthesized by a sol–gel hydrolysis process in 1 M solutions of the ZrOCl2, Al(NO3)3, Yb(NO3)3, and Sr (NO3)2 salts the amount of which corres...

    L. I. Podzorova, A. A. Il’icheva, O. I. Pen’kova, V. P. Sirotinkin… in Inorganic Materials (2023)

  3. No Access

    Article

    Composites of the Al2O3/Yb-TZP System Modified with Calcium, Strontium, and Barium Cations

    Abstract—The possibility of implementing two simultaneous strengthening mechanisms in a ceramic system of Al2O3 and ZrO2 is discussed, namely, a transformation mechanism due to the tetragonal form of zirconium di...

    L. I. Podzorova, V. E. Kutuzova, A. A. Il’ichyova… in Inorganic Materials: Applied Research (2022)

  4. No Access

    Article

    X-ray Diffraction Study of Structural Changes in High-Strength Ceramics Based on Zirconium Oxide with Additions of Ytterbium and Neodymium Oxides after Hydrothermal Treatment

    A surface structural analysis of two ceramic samples of zirconium oxide (ZrO2) sintered at 1550°C, stabilized in the tetragonal form, before and after hydrothermal treatment, has been performed by the Rietveld me...

    V. P. Sirotinkin, L. I. Podzorova, N. A. Mikhailina… in Crystallography Reports (2022)

  5. No Access

    Article

    Ceramic Composites of the Zirconium Dioxide and Aluminum Oxide System Including Strontium Hexaaluminate

    The preparation and mechanical properties of composites with 20 mol.% Al2O3 and 80% [3Yb–TZP] modified with strontium oxide are considered. It is shown that during heat treatment of the initial nanopowders the st...

    L. I. Podzorova, A. A. Il’icheva, V. P. Sirotinkin, O. S. Antonova… in Glass and Ceramics (2021)

  6. No Access

    Article

    Ceramic Composites of the Tetragonal Zirconia [Yb–Tzp] and Alumina System Modified by Calcium Cations

    Ceramic composite materials with a density not lower than 98.5% of the theoretical value were produced from powders containing 20 and 50 mol % corundum and tetragonal zirconia stabilized with ytterbia (3 mol %...

    L. I. Podzorova, A. A. Il’icheva, V. E. Kutuzova… in Russian Journal of Inorganic Chemistry (2021)

  7. No Access

    Article

    High-Strength Tetragonal Zirconia/Alumina Ceramic Composites Containing Strontium Hexaaluminate

    Using powders prepared by a sol–gel hydrolysis process, we have prepared three-phase ceramic composite materials consisting of alpha-alumina, strontium hexaaluminate, and a solid solution based on tetragonal z...

    L. I. Podzorova, A. A. Il’icheva, O. I. Pen’kova, O. S. Antonova… in Inorganic Materials (2021)

  8. No Access

    Article

    Formation of Strontium Hexaaluminate in Alumina–Tetragonal Zirconia Systems Modified with Strontium Cations

    The effect of modifying strontium cations on the phase composition of the sol–gel synthesized matrix systems containing 20% of Al2O3 and 80% of a tetragonal zirconia polycrystals (TZP) solid solution stabilized b...

    A. A. Il’icheva, L. I. Podzorova… in Russian Journal of Inorganic Chemistry (2020)

  9. No Access

    Article

    Stability of Ceramic-Ceramic Restorations for Orthopedic Dentistry

    Abstract—This paper presents the results of studying the strength of the joint of denture systems: frame–connecting material–veneer. The developed ceramic based on tetragonal ZrO2 stabilized with ytterbium cation...

    L. I. Podzorova, I. Yu. Lebedenko, S. V. Anisimova… in Inorganic Materials: Applied Research (2019)

  10. No Access

    Article

    Al2O3-Based Ceramic Composites with a High Brittle Fracture Resistance

    We examine synthesis conditions of precursors to ZrO2–Al2O3–CeO2 powders modified with calcium cations. The precipitation procedure and the aging of reaction systems of precursors to the synthesized composites ar...

    L. I. Podzorova, A. A. Il’icheva, O. I. Pen’kova, O. S. Antonova… in Inorganic Materials (2019)

  11. No Access

    Article

    Composite Materials in the Zirconia–Tricalcium Phosphate System for Bone Implants

    Based on tricalcium phosphate, new high-strength composite materials were synthesized, in which the strengthening phase was ZrO2. To reduce the sintering temperature and obtain a fine crystalline structure, a spe...

    V. V. Smirnov, M. A. Goldberg, A. I. Krylov, S. V. Smirnov… in Doklady Chemistry (2018)

  12. No Access

    Article

    Frame Catalysts of Al2O3–ZrO2–CeO2 System

    Xerogels and powders of Al2O3–ZrO2–CeO2 systems with different pore structure and matrixes of ZrO2 and Al2O3 are obtained. The specific surface area of xerogels with ZrO2 matrix and Al2O3 matrix exceeds 200 and 9...

    L. I. Podzorova, S. G. Chuklina, A. A. Il’icheva… in Inorganic Materials: Applied Research (2018)

  13. No Access

    Article

    Phase Formation in Al2O3–ZrO2–CeO2 Nanopowders Modified with Calcium Cations

    We have studied phase formation in calcium-modified Al2O3–ZrO2–CeO2 nanopowders during sol–gel synthesis. The results demonstrate that heat treatment of the nanopowders first leads to the formation of a zirconium...

    L. I. Podzorova, A. A. Il’icheva, O. I. Pen’kova, V. P. Sirotinkin… in Inorganic Materials (2018)

  14. No Access

    Article

    Low-temperature aging of ceramic on the basis of tetragonal zirconium dioxide stabilized by cations of yttrium and ytterbium

    The effect of low-temperature aging of ceramics Zr0.97Y0.03O2 (Y-TZP) and Zr0.98Y0.02O2 (Yb-TZP) by the methods of the high-grade diffraction analysis and atomic force microckopy is studied. Formation of the phas...

    L. I. Podzorova, S. A. Titov, A. A. Il’icheva… in Inorganic Materials: Applied Research (2017)

  15. No Access

    Article

    Dispersion Hardening of Composites in the System Aluminum Oxide and Cerium Cation Stabilized Tetragonal Zirconium Dioxide

    The production of composites based on nanopowders synthesized by the sol-gel method in the system aluminum oxide and tetragonal zirconium dioxide stabilized by cerium cations (Al2O3–[Ce–TZP]) is described. It is ...

    L. I. Podzorova, A. A. Il’icheva, O. I. Pen’kova, N. A. Alad’ev… in Glass and Ceramics (2017)

  16. No Access

    Article

    Ethanol dehydrogenation on copper catalysts with ytterbium stabilized tetragonal ZrO2 support

    The physicochemical and catalytic properties of Cu-containing crystalline zirconia, obtained via sol–gel synthesis in the presence of Yb3+ ions and polyvinylpyrrolidone, are studied. DTG/DSC, TEM, XRD and BET met...

    S. G. Chuklina, A. I. Pylinina, L. I. Podzorova… in Russian Journal of Physical Chemistry A (2016)

  17. No Access

    Article

    Modified composites of Al2O3–(Ce-TZP) system as materials for medical use

    This article presents an investigation of the influence of modification of Al2O3–(Ce-TZP) with alkaline earth elements Ca+2 and Mg+2 on the phase composition, microstructure, and strength characteristics of compo...

    L. I. Podzorova, A. A. Il’icheva, O. I. Pen’kova… in Inorganic Materials: Applied Research (2016)

  18. No Access

    Article

    Effect of hydrothermal influence on properties and microstructure of bioinert ceramic Yb–TZP

    It is found that a ceramic based on zirconia modified with oxides of yttrium and ytterbium (Yb–TZP) maintains high mechanical properties after hydrothermal treatment, equivalent to 20 years of residence of an ...

    L. I. Podzorova, S. A. Titov, A. A. Ilychyova… in Inorganic Materials: Applied Research (2016)

  19. No Access

    Article

    Complex Doped Zirconia for Ceramic Implants: Production and Properties

    The physicochemical properties of ZrO2-based composite in the ZrO2–Y2O3–CeO2–CoO system, which is intended for the development of bioinert implants, are examined. To produce the starting nanocrystalline powder, h...

    A. V. Shevchenko, V. V. Lashneva, E. V. Dudnik… in Powder Metallurgy and Metal Ceramics (2014)

  20. No Access

    Article

    Peculiarities of phase formation in Al2O3-CeO2 nanopowders

    The results of the investigations on the influence of CeO2 adding on the transformation of the metastable Al2O3 forms obtained by thermal treatment of xerogels are presented. It is established that in the presenc...

    L. I. Podzorova, A. A. Il’yicheva, O. I. Pen’kova… in Glass Physics and Chemistry (2014)

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