Abstract: A device and to a process for the preparation and charging of starting materials for a glass furnace includes a system for carrying out a mixing of starting material powder and of liquid water producing a moistened mass of starting material powder, to a system for carrying out a mixing of cullet with the moistened mass of starting material powder producing a mixture of starting material and of cullet, known as SM/C mixture, a starting material preheater in which the SM/C mixture circulates and is heated and dried in order to produce a mass to be charged, then a system for charging the glass furnace with the mass to be charged.

Abstract: An abrasive article including a bonded abrasive body having abrasive particles contained within a bond material, the bond material including a vitreous material formed from a mixture having aluminum oxide (Al2O3), bismuth oxide (Bi2O3), and boron oxide (B2O3), and wherein the mixture includes an amount (wt %) of aluminum oxide less than an amount (wt %) of bismuth oxide and the amount (wt %) of aluminum oxide is less than an amount (wt %) of boron oxide.

Abstract: An abrasive article including a bonded abrasive body having abrasive particles contained within a bond material, the bond material including a vitreous material formed from a mixture having aluminum oxide (Al2O3), bismuth oxide (Bi2O3), and boron oxide (B2O3), and wherein the mixture includes an amount (wt %) of aluminum oxide less than an amount (wt %) of bismuth oxide and the amount (wt %) of aluminum oxide is less than an amount (wt %) of boron oxide.

Abstract: A fused and cast refractory product including, in mass percentages on the basis of the oxides and for a total of 100% of the oxides: ZrO2 + Hf2O: balance to 100%; SiO2: ?7.0% to 11.0%; Al2O3: 0.2% to 0.7%; Na2O + K2O: <0.10%; B2O3: 0.3% to 1.5%; CaO + SrO + MgO + ZnO + BaO: ?<0.4%; P2O5: <0.15%; Fe2O3 + TiO2: <0.55%; Other oxide species: ?<1.5%; the mass content of a dopant selected from Nb2O5, Ta2O5 and mixtures thereof being of less or equal to 1.0%, and the A/B ratio of the Al2O3/B2O3 mass contents being less than or equal to 2.0.

Abstract: A fused and cast refractory product including, in mass percentages on the basis of the oxides and for a total of 100% of the oxides: ZrO2 + Hf2O: balance to 100%; SiO2: ?7.0% to 11.0%; Al2O3: 0.2% to 0.7%; Na2O + K2O: <0.10%; B2O3: 0.3% to 1.5%; CaO + SrO + MgO + ZnO + BaO: ?<0.4%; P2O5: <0.15%; Fe2O3 + TiO2: <0.55%; Other oxide species: ?<1.5%; the mass content of a dopant selected from Nb2O5, Ta2O5 and mixtures thereof being of less or equal to 1.0%, and the A/B ratio of the Al2O3/B2O3 mass contents being less than or equal to 2.0.

Abstract: Process for manufacturing a product, including the following successive steps: a) mixing raw materials to form a starting feedstock; b) melting the starting feedstock so as to form a molten liquid; c) solidifying the molten liquid so as to obtain a fused product comprising crystals linked by a glassy phase; and d) crystallization heat treatment of the glassy phase of said fused product, in which the composition of the starting feedstock is adapted in order to manufacture a product having the following chemical composition, as weight percentages based on the oxides, and for a total of 100%: 40%?(ZrO2+HfO2)?94%; 4%<CeO2<31%; 0%?Y2O3; 0%?Al2O3; 2%?SiO2; 0%?MgO; 0%?TiO2; and other oxides?1%.