| 摘要 |
<p>The invention relates to a hollow piece for producing a sintered refractory having the following mean mineral chemical composition in weight percent based of mineral oxides: 40%=Al<SUB>2</SUB>O<SUB>3</SUB>=94%, 0%=ZrO<SUB>2</SUB>=41%, 2%=SiO<SUB>2</SUB>=22%, 1%<Y<SUB>2</SUB>O<SUB>3</SUB>+V<SUB>2</SUB>O<SUB>5</SUB>+TiO<SUB>2</SUB>+Sb<SUB>2</SUB>O<SUB>3</SUB>+Yb<SUB>2</SUB>O<SUB>3</SUB>+Na2O.</p> |
