(19)

(11)

EP 4 824 010 A1

(12)

(43) Date of publication: 21.10.2026 Bulletin 2026/43 (21) Application number: 23833310.8 (22) Date of filing: 12.12.2023

(51) International Patent Classification (IPC):  C04B 35/488(2006.01) C04B 35/645(2006.01) C04B 35/593(2006.01) (52) Cooperative Patent Classification (CPC): C04B 35/488; C04B 35/4885; C04B 35/593; C04B 35/645; C04B 2235/3878; C04B 2235/3882; C04B 2235/3873; C04B 2235/3244; C04B 2235/3206; C04B 2235/3208; C04B 2235/3217; C04B 2235/3248; C04B 2235/3232; C04B 2235/3224; C04B 2235/3418; C04B 2235/77; C04B 2235/762; C04B 2235/765; C04B 2235/80; C04B 2235/786; C04B 2235/9607; C04B 2235/96; C04B 2235/94; C04B 2235/945; C04B 2235/963 (86) International application number: PCT/EP2023/085247 (87) International publication number: WO 2025/124690 (19.06.2025 Gazette 2025/25)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: KH MA MD TN (71) Applicant: Kyocera Fineceramics Europe GmbH 68229 Mannheim (DE)	(72) Inventors: UIBEL, Krishna 67346 Speyer (DE) BIGGEMANN, Jonas 75179 Pforzheim (DE) EHRENSTEIN, Sarah 64579 Gernsheim (DE) VELTEN, Stefan 69126 Heidelberg (DE) (74) Representative: Wesch, Arno  Patentanwaltskanzlei Dr. Arno Wesch Augustaanlage 32 68165 Mannheim 68165 Mannheim (DE)