Radiation-resistant inorganic material and fiber thereof
AssigneeNippon Fiber Corporation
InventorHiroshi Fukazawa
Life of this patent
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Abstract
An inorganic material including SiO2, Al2O3, CaO, and Fe2O3 as components, in which the mass percentages of the components in terms of oxide in the inorganic material are set as follows: i) the total content of SiO2 and Al2O3 is from 40% by mass to 70% by mass; ii) the ratio Al2O3/(SiO2+Al2O3) (mass ratio) is in the range of 0.15 to 0.40; iii) the content of Fe2O3 is from 16% by mass to 25% by mass; and iv) the content of CaO is from 5% by mass to 30% by mass, can be produced as an inorganic material having excellent melt spinnability and excellent radiation resistance.
Claims23
A fiber having radiation resistance comprising an inorganic material, wherein the inorganic material comprises SiO2, Al2O3, CaO, and Fe2O3 as components,
- wherein the mass percentages of the components in terms of oxide in the inorganic material are as follows:
- i) the total content of SiO2 and Al2O3 is from 40% by mass to 70% by mass;
- ii) the ratio Al2O3/(SiO2+Al2O3) (mass ratio) is in the range of 0.15 to 0.40;
- iii) the content of Fe2O3 is from 21% by mass to 25% by mass;
- and
- iv) the content of CaO is from 5% by mass to 25% by mass.
A method for producing an inorganic fiber having radiation resistance,
- the method comprising melt-spinning a mixture of a silica source, an alumina source, a calcium oxide source, and an iron oxide source,
- wherein the mass percentages of SiO2, Al2O3, CaO, and Fe2O3 in terms of oxide in the mixture are as follows:
- i) the total content of SiO2 and Al2O3 is from 40% by mass to 70% by mass;
- ii) the ratio Al2O3/(SiO2+Al2O3) (mass ratio) is in the range of 0.15 to 0.40;
- iii) the content of Fe2O3 is from 21% by mass to 25% by mass;
- and
- iv) the content of CaO is from 5% by mass to 25% by mass.
A part to be irradiated with radiation, the part comprising a fiber having radiation resistance, the fiber comprising an inorganic material, wherein the inorganic material comprises SiO2, Al2O3, CaO, and Fe2O3 as components,
- wherein the mass percentages of the components in terms of oxide in the inorganic material are as follows:
- i) the total content of SiO2 and Al2O3 is from 40% by mass to 70% by mass;
- ii) the ratio Al2O3/(SiO2+Al2O3) (mass ratio) is in the range of 0.15 to 0.40;
- iii) the content of Fe2O3 is from 21% by mass to 25% by mass;
- and
- iv) the content of CaO is from 5% by mass to 25% by mass.
Dependencies are inferred from the claim text.