Research on SiC-Si <sub>3</sub>N <sub>4</sub>-C Corrosion-resistant Materials for Heat Treatment Furnaces Used for Extraction of Valuable Elements from Spent Lithium-ion Batteries

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China's Refractories . 2025, (4): 15 -19 . DOI: 10.19691/j.cnki.1004-4493.2025.04.004