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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0145383 (1980-05-13) |
발명자 / 주소 |
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출원인 / 주소 |
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인용정보 | 피인용 횟수 : 343 인용 특허 : 4 |
The invention relates to synthetic, non-fused, aluminum oxide-based abrasive mineral having a microcrystalline structure of randomly oriented crystallites comprising a dominant continuous phase of a
The invention relates to synthetic, non-fused, aluminum oxide-based abrasive mineral having a microcrystalline structure of randomly oriented crystallites comprising a dominant continuous phase of a
Method of making dense, synthetic, aluminum oxide-based granular abrasive mineral having a substantially homogeneous microcrystalline structure of randomly oriented crystallites comprising modifying component in a dominant continuous alumina phase comprising alpha-alumina, said (a) gelling a substan
Method of making dense, synthetic, aluminum oxide-based granular abrasive mineral having a substantially homogeneous microcrystalline structure of randomly oriented crystallites comprising modifying component in a dominant continuous alumina phase comprising alpha-alumina, said (a) gelling a substantially calcium ion- and alkali metal ion-free homogeneous mixture of an alumina source compound and at least one precursor of at least one modifying component selected from (i) zirconia, hafnia, or a combination of zirconia and hafnia, and (ii) a spinel derived from alumina and at least one oxide of a metal selected from cobalt, nickel, zinc, or magnesium, said precursor being present in an amount to provide in said mineral a dominant continuous alumina phase comprising alpha-alumina and a modifying component content, on a volume percent of fired solids of the mineral, of either (a) at least 10% of said (i), (b), at least 1% of said (ii), or (c) at least 1% of said (ii) and 1-45% of said (i), (b) drying the gelled mixture to form chunky pieces of solid material, and (c) firing said solid material in a non-reducing atmosphere to a temperature of at least 1250°C., but not above the melting point of said mineral, to remove fugitive materials and to nondestructively convert said solid material to a dense aluminum oxide-based mineral.
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