| 摘要 |
PCT No. PCT/JP93/01354 Sec. 371 Date May 24, 1994 Sec. 102(e) Date May 24, 1994 PCT Filed Sep. 21, 1993 PCT Pub. No. WO94/08345 PCT Pub. Date Apr. 14, 1994.The present invention is relates to a high strength solid insulator, and a method of manufacturing the same. The solid insulator is made of cristobalite porcelain containing cristobalite crystals in an amount of less than 10%, in which internal strain in the direction of compression in a columnar insulator body is larger in the diametrically outer portion thereof than in the diametrically inner portion thereof, and the difference Y in internal strain between the outer peripheral portion and diametrically central portion of the insulator body is defined by Y>/=(1.76x10-6) X, wherein X (mm) represents the diameter of the insulator body. The method of manufacturing the solid insulator is characterized in that a sintered insulator body is quenched to increase the difference in internal strain between the inner and outer portions of the insulator body.
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