| 摘要 |
A particulate mixture for use in forming a refractory mass by a ceramic welding technique comprises refractory particles and particles of one or more fuel elements which is or are oxidisable to form a refractory oxide; the fuel being selected so that the average grain size of the total fuel particles is greater than 50 mu m and at least 10% by weight of the fuel is constituted by fuel particles having grain sizes below 50 mu m. The fuel particles, e.g. of Al or Si, are present in such proportion as to release sufficient heat on combustion that at least the surfaces of the refractory particles become softened or melted to allow formation of the weld mass. The mixture additionally incorporates particles of at least one oxidising agent. |
