CERAMIC INSULATOR AND METHODS OF USE AND MANUFACTURE THEREOF
First Claim
1. An insulator comprising:
- a ceramic composition,wherein the ceramic composition comprises crystalline grains and wherein the crystalline grains are substantially oriented to extend in a first direction to provide improved insulating properties in a direction perpendicular to the first direction.
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Abstract
One embodiment of the present disclosure is directed to an insulator comprising a ceramic composition, wherein the ceramic composition comprises about 25-60% SiO2; 15-35% R2O3, wherein the R2O3 is 3-15% B2O3 and 5-25% Al2O3; 4-25% MgO+0-7% Li2O, wherein the total of MgO+Li2O is between about 6-25%; 2-20% R2O, wherein the R2O is 0-15% Na2O, 0-15% K2O, 0-15% Rb2O; 0-15% Rb2O; 0-20% Cs2O; and 4-20% F; crystalline grains, wherein the crystalline grains are substantially oriented to extend in a first direction to provide improved insulating properties in a direction perpendicular to the first direction, wherein the first direction is circumferential and the direction perpendicular to the first direction is radial; and a first zone and a second zone, wherein the first zone is in compression and the second zone is in tension.
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Citations
22 Claims
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1. An insulator comprising:
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a ceramic composition, wherein the ceramic composition comprises crystalline grains and wherein the crystalline grains are substantially oriented to extend in a first direction to provide improved insulating properties in a direction perpendicular to the first direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14)
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13. An insulator comprising:
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a ceramic composition, wherein the ceramic composition comprises; about 25-60% SiO2;
15-35% R2O3, wherein the R2O3 is 3-15% B2O3 and 5-25% Al2O3;
4-25% MgO+0-7% Li2O, wherein the total of MgO+Li2O is between about 6-25%;
2-20% R2O, wherein the R2O is 0-15% Na2O, 0-15% K2O, 0-15% Rb2O;
0-15% Rb2O;
0-20% Cs2O; and
4-20% F;crystalline grains, wherein the crystalline grains are substantially oriented to extend in a first direction to provide improved insulating properties in a direction perpendicular to the first direction, wherein the first direction is circumferential and the direction perpendicular to the first direction is radial; and a first zone and a second zone, wherein the first zone is in compression and the second zone is in tension.
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15. A method of modifying one or more properties of a substantially amorphous material comprising:
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providing a substantially amorphous material; selectively inducing a phase change in a first zone of the material without substantially inducing a phase change in a second zone of the material. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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Specification