초록 ▼

There is disclosed a material for hot or plasma spraying, especially a material based on oxide ceramics, and a process for the production thereof. The composition of the invention is a mixture of powdered oxides containing at least two fundamental oxides with high melting point, and at least one gla

There is disclosed a material for hot or plasma spraying, especially a material based on oxide ceramics, and a process for the production thereof. The composition of the invention is a mixture of powdered oxides containing at least two fundamental oxides with high melting point, and at least one glass-forming oxide the melting point of which is lower. The invention also includes a process for the production of such composition by the melting and agglomeration of individual components in the oxidizing medium of a plasma stream, including the special treatment of the starting components.

대표청구항 ▼

In a spraying material for hot or plasma spraying consisting of several metal oxides of which at least one oxide is a glass-forming oxide, the improvement wherein the material is formed by agglomerates selected from one of the groups consisting of: (1) 50% to 80% by weight of CaO, 1% to 5% by weight

In a spraying material for hot or plasma spraying consisting of several metal oxides of which at least one oxide is a glass-forming oxide, the improvement wherein the material is formed by agglomerates selected from one of the groups consisting of: (1) 50% to 80% by weight of CaO, 1% to 5% by weight of MgO, and 18% to 45% by weight of SiO2; (2) 50% to 90% by weight of MgO, 1% to 5% by weight of CaO, and 5% to 45% by weight of SiO2; (3) 90% to 95% by weight of Cr2O3, 2% to 8% by weight of TiO2, and 1% to 3% by weight of SiO2; (4) 65% to 75% by weight of Cr2O3, 20% to 30% by weight of MgO, and 2% to 10% by weight of SiO2; (5) 30% to 40% by weight of Al2O3, 15% to 25% by weight of CaO, and 35% to 50% by weight of SiO2; (6) 25% to 30% by weight of Al2O3, 40% to 45% by weight of BaO, and 25% to 35% by weight of SiO2; (7) 46% to 51% by weight of Al2O3, 33% to 41% by weight of ZrO2, and 8% to 21% by weight of SiO2; and (8) 25% to 30% by weight of Al2O3, 25% to30% by weight of Cr2O3, 25% to 30% by weight of ZrO2 and 10% to 25% by weight of SiO2; said glass-forming oxide being SiO2 having a particle size of 0.0002 to 0.04 mm, and the other metal oxides being fundamental oxides having a particle size of 0.01 to 0.2 mm.