Patent ID: 7189470

Claim:
A solid oxide fuel cell device incorporating a sealing material resistant to hydrogen gas permeation at a sealing temperature in the inter-mediate temperature range of 600° C.–800° C., the seal having a CTE in the 100×10 −7 /° C. to 120×10 −7 /° C., wherein the sealing material comprises in weight %, of: (i) a 75 to 95 wt % of glass frit, the glass frit itself comprises in mole %: SiO 2 70–80 Al 2 O 3 1–3 Na 2 O 0–5 K 2 O 12–20 ZnO 0–5, ZrO 2 0–6 MgO 0–7; and TiO 2 0–2, and no Y 2 O 3 or La 2 O 3 or other lanthanides; and (ii) an alumina, zirconia or leucite addition 5 wt % to 25 wt %.