24-09-2015 дата публикации
Номер: US20150267133A1
Принадлежит:
A sintered refractory product having a granulate bonded by a matrix and comprising, in percentages by mass based on the oxides, —more than 40% chromium oxide CrO, —less than 50% aluminium oxide AlO% or more zirconium oxide ZrO, of which at least 20% by mass is stabilised in the cubic and/or quadratic form, −0.1% or more yttrium oxide YO, acting as a stabiliser for the zirconium oxide ZrO, —less than 1.9% hafnium oxide HfO, the total content of chromium, aluminium and zirconium oxides CrO+AlO+ZrObeing greater than 70%. 1. A sintered refractory product exhibiting an aggregate bonded by a matrix and comprising , as percentages by weight on the basis of the oxides:{'sub': 2', '3, 'more than 40% of chromium oxide CrO,'}{'sub': 2', '3, 'less than 50% of aluminum oxide AlO,'}{'sub': '2', '1% or more of zirconium oxide ZrO, at least 20% by weight of which is stabilized in the cubic and/or tetragonal form,'}{'sub': 2', '3', '2, '0.1% or more of yttrium oxide YO, acting as stabilizer for the zirconium oxide ZrO,'}{'sub': 2', '2', '3', '2', '3', '2, 'less than 1.9% of hafnium oxide HfO, the total content of chromium oxide, aluminum oxide and zirconium oxide CrO+AlO+ZrObeing greater than 70%.'}2. The product as claimed in claim 1 , in which:{'sub': 2', '3, 'the content of chromium oxide CrOis greater than 65%, and/or'}{'sub': 2', '3, 'the content of aluminum oxide AlOis less than 35%, and/or'}{'sub': '2', 'the content of zirconium oxide ZrOis greater than 3%, and/or'}{'sub': 2', '3, 'the content of yttrium oxide YOis greater than 0.2%, and/or'}{'sub': 2', '3', '2', '3', '2, 'claim-text': 'as percentages by weight on the basis of the oxides.', 'the total content of chromium oxide, aluminum oxide and zirconium oxide CrO+AlO+ZrOis greater than 80%,'}3. The product as claimed in claim 2 , in which:{'sub': 2', '3, 'the content of chromium oxide CrOis greater than 75%, and/or'}{'sub': 2', '3, 'the content of aluminum oxide AlOis less than 10%, and/or'}{'sub': '2', 'the content of ...
Подробнее