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.
Claims22
An inorganic material having radiation resistance, the inorganic material comprising 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 16% by mass to 25% by mass;
- and
- iv) the content of CaO is from 5% by mass to 30% 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 16% by mass to 25% by mass;
- and
- iv) the content of CaO is from 5% by mass to 30% by mass.
A part to be irradiated with radiation, the part comprising the inorganic material including 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 16% by mass to 25% by mass;
- and
- iv) the content of CaO is from 5% by mass to 30% by mass.
A method for suppressing radiation-induced deterioration of a fiber-reinforced composite material constituting a part to be irradiated with radiation, wherein an inorganic fiber including SiO2, Al2O3, CaO, and Fe2O3 as components is used as the fiber, and
- 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 16% by mass to 25% by mass;
- and
- iv) the content of CaO is from 5% by mass to 30% by mass.
Dependencies are inferred from the claim text.