MANUFACTURE OF OCTACALCIUM PHOSPHATE SINGLE CRYSTAL AND POLYCRYSTAL STRUCTURE THEREOF, AND STRUCTURE INCORPORATING THE SAME

Title:

MANUFACTURE OF OCTACALCIUM PHOSPHATE SINGLE CRYSTAL AND POLYCRYSTAL STRUCTURE THEREOF, AND STRUCTURE INCORPORATING THE SAME

Document Type and Number:

Japanese Patent JPH0328197

Kind Code:

A

Abstract:

PURPOSE: To improve homogeneity by simultaneously adding an aq. soln. of Ca cations and an aq. soln. of phosphoric acid anions to an aq. medium, which is maintained at a specific temp. and pH Value, thereby forming a dispersion contg. 8Ca phosphate and then cooling the dispersion.

CONSTITUTION: The aq. soln. of Ca cations such as Ca acetate with a concentration of about 1 to 10 g/l and the aq. soln. of phosphoric acid anions such as Ha3PO4 with the same concentration are simultaneously added to the aq. medium, which is maintained at a temp. of about 60 to 90°C and a pH value of about 4 to 7, in the stoichiometric amount and at an adding rate of about 0.1 to 0.5 l/hr. and are mixed to produce the dispersion. After the aq. solns. are completely added and then the dispersion is cooled, a deposite is filtrated, washed by water and dried to obtain spherulites of 8Ca phosphate. Next, this 8Ca phosphate is heated in an aq. environment at about 170 to 280°C for 1 to 24 hours or thereabouts, whereby hydroxyapatite is obtd.

Inventors:

BURENTO AARU KONSUTANTSU

Application Number:

JP3261090A

Publication Date:

February 06, 1991

Filing Date:

February 15, 1990

Export Citation:

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Assignee:

NORIAN CORP

International Classes:

C30B7/14; A61L27/12; A61L27/32; C01B25/32; C30B29/14; A61F2/00; (IPC1-7): C30B7/14; C30B29/14

Attorney, Agent or Firm:

Shusaku Yamamoto

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