{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T02:08:35Z","timestamp":1760234915519,"version":"build-2065373602"},"reference-count":47,"publisher":"MDPI AG","issue":"14","license":[{"start":{"date-parts":[[2021,7,7]],"date-time":"2021-07-07T00:00:00Z","timestamp":1625616000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100004281","name":"Narodowe Centrum Nauki","doi-asserted-by":"publisher","award":["NCN Grant No. 2017\/25\/B\/ST5\/01032"],"award-info":[{"award-number":["NCN Grant No. 2017\/25\/B\/ST5\/01032"]}],"id":[{"id":"10.13039\/501100004281","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>Presented is a study on the preparation, via original precursor solution chemistry, of intimately mixed composite nanocrystalline powders in the system gallium nitride GaN\u2013titanium nitride TiN, atomic ratio Ga\/Ti = 1\/1, which were subjected to high-pressure (7.7 GPa) and high-temperature (650, 1000, and 1200 \u00b0C) sintering with no additives. Potential equilibration toward bimetallic compounds upon mixing of the solutions of the metal dimethylamide precursors, dimeric {Ga[N(CH3)2]3}2 and monomeric Ti[N(CH3)2]4, was studied with 1H- and 13C{H}-NMR spectroscopy in C6D6 solution. The different nitridation temperatures of 800 and 950 \u00b0C afforded a pool of in situ synthesis-mixed composite nanopowders of hexagonal h-GaN and cubic c-TiN with varying average crystallite sizes. The applied sintering temperatures were either to prevent temperature-induced recrystallization (650 \u00b0C) or promote crystal growth (1000 and 1200 \u00b0C) of the initial powders with the high sintering pressure of 7.7 GPa having a detrimental effect on crystal growth. The powders and nanoceramics, both of the composites and of the individual nitrides, were characterized if applicable by powder XRD, SEM\/EDX, Raman spectroscopy, Vicker\u2019s hardness, and helium density. No evidence was found for metastable alloying of the two crystallographically different nitrides under the applied synthesis and sintering conditions, while the nitride domain segregation on the micrometer scale was observed on sintering. The Vicker\u2019s hardness tests for many of the composite and individual nanoceramics provided values with high hardness comparable with those of the individual h-GaN and c-TiN ceramics.<\/jats:p>","DOI":"10.3390\/ma14143794","type":"journal-article","created":{"date-parts":[[2021,7,7]],"date-time":"2021-07-07T12:31:25Z","timestamp":1625661085000},"page":"3794","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["New Nitride Nanoceramics from Synthesis-Mixed Nanopowders in the Composite System Gallium Nitride GaN\u2013Titanium Nitride TiN"],"prefix":"10.3390","volume":"14","author":[{"given":"Mariusz","family":"Dryga\u015b","sequence":"first","affiliation":[{"name":"Faculty of Energy and Fuels, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krak\u00f3w, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5486-5283","authenticated-orcid":false,"given":"Katarzyna","family":"Lejda","sequence":"additional","affiliation":[{"name":"Faculty of Energy and Fuels, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krak\u00f3w, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0145-6475","authenticated-orcid":false,"given":"Jerzy F.","family":"Janik","sequence":"additional","affiliation":[{"name":"Faculty of Energy and Fuels, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krak\u00f3w, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3003-1660","authenticated-orcid":false,"given":"Klaudia","family":"\u0141yszczarz","sequence":"additional","affiliation":[{"name":"Faculty of Materials Science and Ceramics, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krak\u00f3w, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Stanis\u0142aw","family":"Gierlotka","sequence":"additional","affiliation":[{"name":"Institute of High Pressure Physics, Polish Academy of Sciences, ul. Soko\u0142owska 29\/37, 01-142 Warszawa, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Svitlana","family":"Stelmakh","sequence":"additional","affiliation":[{"name":"Institute of High Pressure Physics, Polish Academy of Sciences, ul. Soko\u0142owska 29\/37, 01-142 Warszawa, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bogdan","family":"Pa\u0142osz","sequence":"additional","affiliation":[{"name":"Institute of High Pressure Physics, Polish Academy of Sciences, ul. Soko\u0142owska 29\/37, 01-142 Warszawa, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2021,7,7]]},"reference":[{"key":"ref_1","first-page":"2009099","article-title":"Transition metal nitrides: Activity origin, synthesis and electrocatalytic applications","volume":"37","author":"Qin","year":"2021","journal-title":"Acta Phys. Chim. Sin."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"143001","DOI":"10.1088\/1361-6463\/abd65a","article-title":"Group-III-nitride and halide-perovskite semiconductor gain media for amplified spontaneous emission and lasing applications","volume":"54","author":"Ng","year":"2021","journal-title":"J. Phys. D-Appl. 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