| 摘要 |
<p>Disclosed is a tablet which contains bismuth glass and a refractory filler. The tablet is characterized in that (1) the bismuth glass has a glass composition containing, in percentage by mass, 70-90% of Bi2O3, 2-12% of B2O3, 0-5% of Al2O3, 1-15% of ZnO, 0-10% of BaO and 0-8% of CuO + Fe2O3, (2) alumina is contained in an amount of 1-25% by volume as the refractory filler, and (3) the filling factor is not less than 71%.</p> |
