IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0799867
(1991-11-27)
|
발명자
/ 주소 |
- Wood William P. (Minneapolis MN)
|
출원인 / 주소 |
- Minnesota Mining and Manufacturing Company (St. Paul MN 02)
|
인용정보 |
피인용 횟수 :
77 인용 특허 :
0 |
초록
▼
Ceramic abrasive grits are formed by an impregnation process that involves preparing an alumina hydrate sol, drying the sol to form a porous solid, crushing the solid to produce particles, calcining the dried particles, preparing a mixture of an additive metal oxide or its precursor in a liquid vehi
Ceramic abrasive grits are formed by an impregnation process that involves preparing an alumina hydrate sol, drying the sol to form a porous solid, crushing the solid to produce particles, calcining the dried particles, preparing a mixture of an additive metal oxide or its precursor in a liquid vehicle, impregnating the mixture into the calcined particles, drying the impregnated particles, calcining the dried impregnated particles, and firing the particles to produce ceramic abrasive grits. The concentration of the modifying additive metal is greater at or near the surface of the grit than at the interior of the grit.
대표청구항
▼
Ceramic abrasive grits comprising alpha alumina and at least about 0.5% by weight of at least one modifying metal oxide, the metal of the metal oxide being selected from the group consisting of zirconium, hafnium, cobalt, nickel, zinc, magnesium, yttrium, praseodymium, samarium, ytterbium, neodymium
Ceramic abrasive grits comprising alpha alumina and at least about 0.5% by weight of at least one modifying metal oxide, the metal of the metal oxide being selected from the group consisting of zirconium, hafnium, cobalt, nickel, zinc, magnesium, yttrium, praseodymium, samarium, ytterbium, neodymium, lanthanum, gadolinium, cerium, dysprosium, erbium, and combinations of two or more of such metals, wherein the concentration of said modifying metal oxide is greater at or near the surface of said grit than at the interior of said grit.
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