http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-S6476942-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_28a869d6fc950d50f6df03f549ca3afa |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B25-32 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61L27-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B35-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B35-447 |
| filingDate | 1988-09-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9db9113fa7e99aad5f0babb4a0d98f47 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_996738741db046c28cd25ae2684c593b |
| publicationDate | 1989-03-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-S6476942-A |
| titleOfInvention | Hydroxyapatite pottery material and production thereof |
| abstract | PURPOSE:To obtain the titled pottery material of high purity and high density with outstanding thermal stability, by reaction between water and CaO which was produced by thermal decomposition of high-purity CaCO3 powder under an inert atmosphere followed by reaction of the resulting Ca(OH)2 suspension with phosphoric acid. CONSTITUTION:Lime (CaO) produced by thermal decomposition of CaCO3 powder with a purity of >=99.8% in an inert atmosphere at 800-1,300 deg.C for 0.5-10hr is cooled to 500 deg.C or lower in an inert atmosphere followed by addition of 10-100pts.wt. per pt.wt. of CaO of water and carrying out reaction at 0-80 deg.C for 1-24hr while stirring at high speed to prepare a milky Ca(OH)2 suspension with an average particle size of 0.05-1mum. Thence, this suspension is allowed to react with an aqueous phosphoric acid solution of a concentration of 1-10wt.% in one inert atmosphere at 0-50 deg.C for 0.5-200hr to produce hydroxyapatite. This hydroxyapatite is filtered and dried followed by pressurized forming and calcining at 850-1,400 deg.C for 0.5-5hr, thus obtaining the objective hydroxyapatite pottery material with an element ratio Ca/P of 1.67-1.69, average crystal diameter of 4-20mum and density of 3.14-3.16g/cm<3>. This hydroxyapatite pottery material is such that the formation of whitlockite cannot be observed even if calcined at 1,350 deg.C for 1hr. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H0316906-A |
| priorityDate | 1979-09-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 25.