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. 2024 Mar 13;627(8003):306–312. doi: 10.1038/s41586-024-07061-4

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© The Author(s) 2024

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Extended Data Fig. 3 — a, Thermogravimetric analysis (TGA) shows that after heating SIL 30 resin to 800 °C in nitrogen, 9.5% of the initial mass remains. b, X-ray diffraction patterns show that after pyrolysis of cured SIL30 resin at 800 °C and 1200 °C, the products remain amorphous. After annealing at 1400 °C, the measured pattern has reflections that match those for α-Si₃N₄ (PDF 04-0070851) from the International Centre for Diffraction Data (ICDD)^51,52. c, TGA of HDDA-Ceramic Mix shows that after heating to 800 °C in nitrogen, 8.8% of the initial mass remains. d, X-ray diffraction pattern showing that after pyrolysis of the HDDA-Ceramic mix at 1400 °C for a total of 8 h, the measured patterns has reflections that match those for α-Si₃N₄ (PDF 04-0070851) and SiO₂ (PDF 04-0075018) from the ICDD⁵³.

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