http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H01270515-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_72d390007d722e278b3b1f970c537393 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G25-02 |
| filingDate | 1988-04-21^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_72a8f7fc9b5013047f4e5ad7dd041984 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_798b707c9fe6b396f4fe9344bc1a4be1 |
| publicationDate | 1989-10-27^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-H01270515-A |
| titleOfInvention | Production of zirconia fine powder |
| abstract | PURPOSE: To obtain the title fine powder, sharp in particle size distribution, good in dispersibility, reduced in impurity content, by neutralizing a specific basic Zr(SO 4 ) 2 -contg. slurry with ammonia followed by treatment with ammonia water. n CONSTITUTION: (NH 4 ) 2 SO 4 is added to a solution prepared by dissolving a 40-70g/l (on a ZrO 2 basis) of a water-soluble Zr compound (e.g., oxy ZnCl 4 ) in water so as to be 0.45-0.55mols per mol of Zr on a SO 4 basis is to prepare an aqueous solution. Thence, this solution to which, as a seed crystal, basic Zr(SO 4 ) 2 fine powder is added is heated to ≥75°C to produce a slurry with basic Zr(SO 4 ) 2 precipitate suspended. This slurry is then incorporated, in a single spell, with ammonia water, stirred and adjusted to pH≥8.5 followed by neutralization and filtration and washing to obtain a solid product, which is then treated with ammonia water to eliminate sulfate ion from the basic Zr(SO 4 ) 2 into Zr(OH) 4 , which is then calcined, thus obtaining the objective zirconia fine powder ≤0.4 in bulk density and ≤5μm in average particle size. n COPYRIGHT: (C)1989,JPO&Japio |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-20170030533-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5470550-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10010868-B2 |
| priorityDate | 1988-04-21^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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