发明名称 |
CERAMIC SPHEROIDS |
摘要 |
Ceramic spheroids having: A. a core made by firing raw materials comprising about: 50-99.8 parts by weight mineral particulates; 0.1 to 50 parts by weight silicon carbide; and 0.1 to 15 parts by weight binder (e.g. bentonite); and B. an outer shell comprising Al2O3 or MgO. More alumina or magnesium oxide is contained in the outer shell than in the core. The core of the ceramic spheroid has closed cell microporosity. The inventive spheroids are characterized by a density less than 2.2 g/cc and can be readily made to have a density less than 1 g/cc. These ceramic spheroids combine high strength (due to the tough outer shell) with low density (due to the closed cell microporosity) and have applications (among others) as buoyant water filtration media and low density fillers. |
申请公布号 |
AU5786986(A) |
申请公布日期 |
1986.12.18 |
申请号 |
AU19860057869 |
申请日期 |
1986.05.23 |
申请人 |
MINNESOTA MINING AND MANUFACTURING CO. |
发明人 |
JAMES ALLEN LAIRD;WARREN RANDALL BECK |
分类号 |
C04B38/00;B01D39/06;B01J19/30;C04B20/06;C09K8/80;E21B43/267 |
主分类号 |
C04B38/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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