EP0141388A2
Expired / Lapsed
EP
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Jewelling and ornamental material and process for production thereof
Assignee: Kyocera Corp
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Filing: 1984-10-26
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Granted: —
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Expires: 2004-10-26
Abstract
Abstract A jewelling and ornamental material comprising many amorphous silica spheres regularly arranged in a three-dimensional array and a zirconium compound filled in pores existing among the amorphous silica spheres, the amount of the zirconium compound being 0.005 to 8 % by weight, as zirconium, based on the entire material; and a process for its production. This material has a play of colors inherent to natural opal, and excellent durability.
Inventors
- 👤 Yuji Nakano
- 👤 Kazushi Kamiyama
- 👤 Tatuo Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 16:24
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; B; B44; B44C; B44C3/00; B44C3/04; B44C5/00; B44F; B44F9/00; B44F9/04; C04B41/45; C04B41/50; C04B41/5025; C04B41/5042; C04B41/80; C04B41/81; C04B41/85; C04B41/87; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
49 words
A jewelling and ornamental material comprising many amrophous silica spheres regularly arranged in a three-dimensional array and a zirconium compound filled in pores existing among the amorphous silica spheres, the amount of the zirconium compound being 0.005 to 8 % by weight, as zirconium, based on the entire material.
Claim 2
Dependent Claim
49 words
A jewelling and ornamental material comprising many amrophous silica spheres regularly arranged in a three-dimensional array and a zirconium compound filled in pores existing among the amorphous silica spheres, the amount of the zirconium compound being 0.005 to 8 % by weight, as zirconium, based on the entire material.
Claim 3
Dependent Claim
22 words
The material of claim 1 wherein the amorphous silica spheres have a particle diameter in the range of 150 to 400 mµ.
Claim 4
Dependent Claim
21 words
The material of claim 1 wherein the variation of the particle diameter of the amorphous silica spheres is within +15 %.
Claim 5
Dependent Claim
33 words
The material of claim 1 wherein the amorphous silica spheres exist in a primitive cubic structure, a face-centered structure, a hexagonal closest-packed structure, a body-centered cubic structure or a combination of these structures.
Claim 6
Dependent Claim
14 words
The material of claim 1 wherein the zirconium compound is an oxide of zirconium.
Claim 7
Dependent Claim
21 words
The material of claim 1 wherein the zirconium compound is formed by hydrolyzing an alkoxide of zirconium and calcining the product.
Claim 8
Dependent Claim
114 words
A process for producing a jewelling and ornamental material, which comprises a step of producing a structure composed of regularly three-dimensionally arranged amorphous silica spheres by subjecting a mixture of uniform amorphous silica spheres having a predetermined diameter with water to a sedimentation operation and then to drying and calcining operations, a step of impregnating the three-dimensionally arranged structure with a solution of a zirconium alkoxide so that the amount of zirconium based on the entire structure becomes 0.005 to 8 % by weight, hydrolyzing the zirconium alkoxide to zirconium oxide or hydroxide and precipitating it in the pores of the structure, and a step of calcining the resulting structure at a high temperature.
Claim 9
Dependent Claim
114 words
A process for producing a jewelling and ornamental material, which comprises a step of producing a structure composed of regularly three-dimensionally arranged amorphous silica spheres by subjecting a mixture of uniform amorphous silica spheres having a predetermined diameter with water to a sedimentation operation and then to drying and calcining operations, a step of impregnating the three-dimensionally arranged structure with a solution of a zirconium alkoxide so that the amount of zirconium based on the entire structure becomes 0.005 to 8 % by weight, hydrolyzing the zirconium alkoxide to zirconium oxide or hydroxide and precipitating it in the pores of the structure, and a step of calcining the resulting structure at a high temperature.
References Cited (Backward Citations)
No citation records indexed.
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