Emil Tinkov Stoyanov

Portrait of Emil Tinkov Stoyanov
Send Email Download Hi-res
  • Title
    Staff Scientist
  • Email
    stoyanov1@llnl.gov
  • Phone
    (925) 422-7012
  • Organization
    PLS-MSD-MATERIALS SCIENCE DIVISION

Research interests

 

  • New technologies and systems for large volume HPHT synthesis.
  • Fundamental properties of materials at extreme conditions.
  • Crystal chemistry and thermodynamics of atomic substitutions in solid solution formation.
  • Solid-gas reactions and hydrothermal synthesis of new materials at extreme conditions.
  • Phase transitions and electronic structure of solids at high pressure.
  • Transmission electron microscopy combined with electron energy loss spectroscopy.

 

Career path

 

Prior to joining LLNL, Emil spent over 11 years in the area of industrial high pressure, high temperature materials synthesis R&D. He earned his PhD in Geosciences from the Friedrich-Schiller University of Jena, Germany, and did post-doctoral research on materials synthesis at HPHT, and thermodynamics of ceramics and oxides at Arizona State University and University of California Davis, respectively. Emil is currently working on the synthesis of high-pressure ceramic and mineralogical phases and is a member of an interdisciplinary team responsible for conducting and supporting research at high pressures and temperatures to synthesize metastable high pressure phases, determine their thermodynamic properties, evaluate manufacturability, and work with technology transfer with industry partners.

 

Subject Matter Expertise

 

High-pressure high-temperature (HPHT) synthesis, hard and superhard materials, powder characterization, electron energy loss spectroscopy (EELS), lab-scale to production transition, cross-functional communication

Ph.D., Geosciences, Friedrich Schiller University Jena, Jena, Germany, 2007

M.S., Inorganic Chemistry, Sofia University St. Kliment Ohridski, Sofia, Bulgaria, 2003

Selected publications

 

  1. Leinenweber, K., Stoyanov, E., Malik, A-S. (2019) Immiscibility between two rutile phases in the TiO2-GeO2 system and application as a temperature sensor in high pressure experiments. Journal of Materials Research, Focus Issue: Thermodynamics of Complex Solids, DOI (https://doi.org/10.1557/jmr.2019.253)

 

  1. Stoyanov, E., Leinenweber, K., Groy, T. L., Malik, A.-S. (2018) Ge0.57Ti0.43O2: a new high-pressure material with rutile-type crystal structure. Acta Crystallographica Section E, 74, 1010-1012. DOI (https://doi.org/10.1107/S2056989018008988)

 

  1. Spektor, K., Nylen, J., Mathew, R., Edén, M., Stoyanov, E., Navrotsky, A., Leinenweber, K., Häussermann, U. (2016) Formation of hydrous stishovite from coesite in high pressure hydrothermal environments. American Mineralogist, 101 (11), 2514-2524. DOI (https://doi.org/10.2138/am-2016-5609)

 

  1. Leinenweber, K.,  Gullikson, A. L., Stoyanov, E., Malik. A.-S. (2015) Saturation curve of SiO2 component in rutile-type GeO2: A recoverable high-temperature pressure standard from 3 GPa to 10 GPa. Journal of Solid State Chemistry, 229, 10–18. DOI (https://doi.org/10.1016/j.jssc.2015.05.009)

 

  1. Gullikson, A. L., Leinenweber, K., Stoyanov, E., Zhang, H., Malik, A.-S. (2015), High-Pressure Investigation in the System SiO2–GeO2: Mutual Solubility of Si and Ge in Quartz, Coesite and Rutile Phases. Journal of the American Ceramic Society, 98, 982–989. DOI (https://doi.org/10.1111/jace.13352)

 

  1. Stoyanov, E., Langenhorst, F. (2014) The effect of valence state and site geometry on Cr L3,2 electron energy-loss spectra of Cr-bearing oxidic compounds. Chemie der Erde - Geochemistry, SI: 100 years, 74, 3, 497–505. DOI (https://doi.org/10.1016/j.chemer.2014.06.005)

 

  1. Stoyanov E., Häussermann U., Leinenweber K. (2010) Large-volume multianvil cells designed for chemical synthesis at high pressures. High Pressure Research, 30, 1, 175-189. DOI (https://doi.org/10.1080/08957950903422444)

 

  1. Stoyanov E., Langenhorst F., Steinle-Neumann G. (2007) The effect of valence state and site geometry on Ti L3,2  and O K electron energy-loss spectra of TixOy phases. American Mineralogist, 92, 577 - 586. DOI (https://doi.org/10.2138/am.2007.2344)

 

 

For a full list, see Google Scholar:

https://scholar.google.com/citations?user=NuK0ysgAAAAJ&hl=en&oi=ao

LinkedIn:

www.linkedin.com/in/emil-stoyanov-0a8b3993

ResearchGate:

https://www.researchgate.net/profile/Emil-Stoyanov-2

 

Patents

 

1. Camille Mayberry, C., Stoyanov, E., Leinenweber, K., Malik A.-S. Determining temperature inside a high pressure cell by evaluating solid solution composition. U.S. Patent 10,859,444 B2 (2020); European Patent Office EP3519788B1 (2021); South Korea Patent KR102409292B1 (2022).

2. Stoyanov, E., Malik, A.-S. Polycrystalline diamond from vitreous carbon and transition metal free carbonate catalyst and method of producing. Patent application WO2019160812A1 (2019).

3. Gullikson, A., L., Leinenweber, K., D., Stoyanov, E., T., Malik, A.-S. Method for measuring pressures in a high pressure cell by monitoring continuous changes in physical properties of GeO2-SiO2 solid solution. U.S. Patent US20140151604A1 (2016).

  • 2010 Poster Award at Gordon Research Conference on High Temperature Materials, Processes & Diagnostics

Memberships

 

Mineralogical Society of America

http://www.minsocam.org/

The Palaeontological Association

https://www.palass.org/

 

Fun fact:

 

  • 1999 Best swimmer of Sofia University swimming team
  • 2000 Best swimmer of Sofia University swimming team