A porous hexagonal boron nitride powder compact for the production and release of radioactive 11C

Research output: Contribution to journalArticlepeer-review


  • KUL - Katholieke Universiteit Leuven
  • CERN - Conseil Européen pour la Recherche Nucléaire
  • UNIMAN - The University of Manchester

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A porous pre-sintered hexagonal boron nitride powder compact was recently developed as target for the production of intense 11C beams for Positron Emission Tomography-aided hadron therapy. In a previous study, this target has been characterized regarding its operational limitations. In this work, microstructural characterization with respect to the target's grain size, porosity and pore structure, and a dedicated fractional release study from activated targets, i.e. how much 11C is extracted by a short heat treatment, is presented. Corresponding results include an average grain size of approximately 1.7(1) μm , total and open porosity of 40(5) and 21(7)%, respectively, which is mostly composed of pores with sizes ranging from 120 to 470 nm. From the measured release fraction the order of magnitude of carbon's diffusion coefficient D(1500°C) = 1E-15 to 1E-14 cm2/s in porous boron nitride, and a 11C extraction efficiency of about 10% at 1500°C target temperature were estimated.


Original languageEnglish
Pages (from-to)4086-4097
Number of pages12
JournalJournal of the European Ceramic Society
Issue number7
Publication statusPublished - 1 Jul 2021


  • Radioactive ion beam production, C release, Boron nitride target, Release fractions, Release efficiency

ID: 7028652