Quantometric determination of SiO&lt;SUB&gt;2&lt;/SUB&gt;, Al&lt;SUB&gt;2&lt;/SUB&gt;O&lt;SUB&gt;3&lt;/SUB&gt;, ZrO&lt;SUB&gt;2&lt;/SUB&gt;, Fe&lt;SUB&gt;2&lt;/SUB&gt;O&lt;SUB&gt;3&lt;/SUB&gt;, TiO&lt;SUB&gt;2&lt;/SUB&gt;, and Na&lt;SUB&gt;2&lt;/SUB&gt;O in fused-cast refractories
Bunseki Kagaku