| abstract |
Provided is a composite material for sealing which does not substantially contain a lead component for reducing environmental load and is excellent in required low expansion characteristics, weather resistance, fluidity, and the like. A lead-free glass powder and a filler powder, wherein the filler powder contains KZr 2 (PO 4 ) 3 filler powder and / or K 0.5 Nb 0.5 Zr 1.5 (PO 4 ) 3 filler powder. To do. Examples of the phosphoric acid-based lead-free glass powder include SnO 30 to 70%, P 2 O 5 20 to 45%, ZnO 0 to 20%, Al 2 O 3 0 to 10%, SiO 2 0 to 15% in terms of mol%. uses a glass containing B 2 O 3 0~30%. [Selection figure] None |