| CPC C03C 17/02 (2013.01) [B32B 3/30 (2013.01); B32B 7/027 (2019.01); B32B 17/06 (2013.01); C03C 3/091 (2013.01); C03C 11/005 (2013.01); C03C 15/00 (2013.01); C03C 23/007 (2013.01); B32B 2250/03 (2013.01); B32B 2250/40 (2013.01); B32B 2307/412 (2013.01); B32B 2307/7376 (2023.05); C03C 2217/734 (2013.01)] | 20 Claims |

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1. A glass-based article, comprising:
a core, wherein the core comprises phase-separated glass or glass-ceramic; and
a cladding overlaying the core, wherein the cladding comprises glass or glass-ceramic;
wherein the cladding comprises porous surface structures with channels.
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