EP2042052A1 - Pierre décorative - Google Patents

Pierre décorative Download PDF

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Publication number
EP2042052A1
EP2042052A1 EP07117131A EP07117131A EP2042052A1 EP 2042052 A1 EP2042052 A1 EP 2042052A1 EP 07117131 A EP07117131 A EP 07117131A EP 07117131 A EP07117131 A EP 07117131A EP 2042052 A1 EP2042052 A1 EP 2042052A1
Authority
EP
European Patent Office
Prior art keywords
crystal
earth metal
gemstone
gem
stands
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP07117131A
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German (de)
English (en)
Inventor
Albert Zeller
Bernhard Walfort
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RC Tritec AG
Original Assignee
RC Tritec AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by RC Tritec AG filed Critical RC Tritec AG
Priority to EP07117131A priority Critical patent/EP2042052A1/fr
Publication of EP2042052A1 publication Critical patent/EP2042052A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C17/00—Gems or the like

Definitions

  • the present invention is concerned with gemstones.
  • Gemstones are minerals, which act from all through refraction, reflections and color phenomena. The effect of these gemstones is thus dependent on incident light. To enhance the lighting effects gemstones are usually faceted and polished. Nevertheless, at low light levels, e.g. in rooms, the light effect and thus the jewelry effect after.
  • the object of the invention is to provide a gem that generates light effects even with diminishing ambient light.
  • a crystal is understood to mean both a single crystal having a homogeneous crystal lattice and a crystal of a plurality of single crystals (polycrystalline aggregates or twinned crystals). If the term monocrystal is used, it is understood explicitly to mean a crystal with a uniform homogeneous crystal lattice.
  • the crystal may be ground and / or polished in a known manner to reflect and refract light in a known manner.
  • Gemstones of a luminescent crystal according to the invention have a mass of at least 0.0005 Kt (karat), in particular greater than 0.002 Kt, preferably greater than 0.01 Kt, particularly preferably greater than 0.05 Kt.
  • single crystals of 0.5 to 3 Kt are effective.
  • they are transparent or translucent.
  • the surfaces of the Gemstone may be partially or wholly polished and / or faceted.
  • faceted or faceted is meant grinded surfaces of gemstones, for the generation of reflections and refraction effects. Reflections and refraction effects are particularly effective when the gemstone consists of a single crystal, so that only the desired, caused by the facets refractions occur.
  • the crystal can be colored. Coloring is to be understood here as meaning both coloring by deliberate doping with foreign atoms and coloring by means of a coating.
  • Luminescent materials are known per se. For this purpose, crystals are used with a small amount of impurity which disturbs the lattice structure of the crystal. In most cases, sulfides and / or oxides of second group metals and zinc are used and mixed with small amounts of heavy metal salts, for example, zinc sulfide with traces of heavy metal salts.
  • Other established luminescent substances are the strontium aluminates doped with europium and dysprosium. These materials must be excited by a light source and then glow in the dark for a shorter or longer time, depending on the composition.
  • These substances are added as a pigment powder in the form of very small particles to a polymer, so that a spreadable, pourable or sprayable mass is formed.
  • Exemplary materials are described in the two US patents US 5424006 and US 5686022 , as well as the US application US 2007/0096058 from Nemoto & Co., Ltd. described.
  • Afterglow substances are also applied by printing or by hand as a marking (e.g., escape route marking). In daylight, such luminescent markings have no refraction or reflection and may even affect an aesthetic effect.
  • the invention makes use of the technology known from the production of luminescent coatings in order to artificially produce a luminescent crystal of appropriate size and / or processing as a gemstone.
  • a luminescent crystal as a gemstone opens up new opportunities in the jewelry industry.
  • a cut gemstone in daylight by its refractive effects act, while the same gemstone captivates at night by its luminosity.
  • Gemstones made of luminescent crystals can be used for example on watches, finger rings, earrings, bangles, brooches, necklaces, tie pins, cufflinks, hairpins, hair clips, piercings, and other pieces of jewelry.
  • An application to everyday objects, such as glasses, cell phones, car dashboard, fashion shoes, etc. is conceivable.
  • the luminescent gem stone is taken individually, so that its effect appears optimally.
  • Single version means devices to hold gemstones individually and to connect them with pieces of jewelry.
  • luminescent gemstones can also be taken in groups.
  • crystals can be grown from solutions, from melts or by evaporation, for example by CVD (Chemical Vapor Deposition) or PVD (Physical Vapor Deposition).
  • CVD Chemical Vapor Deposition
  • PVD Physical Vapor Deposition
  • the methods of melt-growing are used for the production of artificial gemstones, for example the Verneuil method, also called flame melting method, or the Czochralski method or a modification thereof, the Stepanov method.
  • the growth of the crystal starts in each case on a crystallization seed introduced into the melt. According to the growth rate of the growing crystal, it is pulled out of the melt so that crystal growth always takes place under the same conditions.
  • the starting material dissolves in an alkaline solution and the crystal grows on a crystallization seed in the upper part of the autoclave.
  • small and very small crystals for example the described materials of the patents US 5424006 . US 5686022 or the registration US 2007/0096058 be used.
  • the linear expansion of these small and micro crystals is for example 1-100 microns.
  • FIG. 1 shows a raw unpolished luminous crystal 2.
  • the crystal 2 shows at its fracture surfaces 4 the levels of the crystal lattice structure. Especially in the dark, its luminosity can be seen, the light beams 3 are shown schematically with dashes.
  • FIG. 2 a gemstone 1 is shown in the form of a brilliant cut crystal in baguette shape.
  • the surface 5 of the gem 1 is provided with facets 6.
  • the gem 1 has a luminosity in the dark, represented by beams 3.
  • FIG. 3 Shown in FIG. 3 is a gem 1 'made of a luminous crystal.
  • This gem is honed in brilliant shape. Due to its facets 6 'and its transparent properties, there is an intense color play in daylight caused by refraction of the light at the internal and external facets 6'. Also this gem 1 'shines in the dark.
  • FIG. 4 shows a clock 10, which is occupied by gemstones 11 and 14 of bright crystals.
  • the gemstones 11 are polished in brilliant shape, individually set and outside mounted on the case of the clock. Alternatively, however, these can also be mounted on the dial 12.
  • the hour hand 13 is also equipped with a gemstone 14 of a luminous crystal. This gemstone 14 is however ground in baguette shape. In the dark, the hour hand 13 as well as the positions 3, 6, 9 and 12 o'clock can clearly be recognized by their bright gemstones. It goes without saying that any combination of cut shapes, number, position and color of the luminous gemstones, as well as a combination of luminous and other gemstones is possible.
  • FIG. 5 the use of a gemstone 21 of a luminous crystal in a ring 20 is shown. Again, the gemstone 21 is cut in brilliant shape. Other cuts are conceivable. The gemstone 21 is taken individually, the version is not shown. Due to the many facets 22 and the resulting refraction effects, an imposing play of colors results in daylight. In the dark, the gemstone 21 shines brightly. It can also be several gems arranged individually or in groups on a ring. Similarly, a combination of different colors and / or with luminous and other gemstones is possible.
  • FIG. 6 schematically illustrated a device 30 for growing a luminous crystal 31 by the Verneuil method.
  • the powdery starting material 37 in particular the finely powdered crystal substance, in particular SrAl 2 O 4 : Eu, Dy or Sr 4 Al 14 O 25 : Eu, Dy, taken and is mixed with oxygen.
  • the oxygen is introduced via the oxygen valve 33 in the storage and metering device 32.
  • a mechanical hammer 34 regularly knocks on the lid of the storage and metering device 32 so that the finely powdered crystal substance trickles into the burner tube 35 via a funnel.
  • hydrogen is supplied via a hydrogen valve 36, which is burned by means of the oxygen.
  • the resulting heat of, for example, 1600-2400 ° C melts the finely powdered crystal substance, which "rains" down from the burner.
  • the downward flame of the burner heats the top of the growing crystal 31, which is located in the fireclay muffle furnace 38.
  • a thin melt film is produced on the crystal 31, which connects to the "melt rain” from the burner.
  • Crystallization takes place at the bottom of the enamel film.
  • the crystal 31 grows drop by drop.
  • the melt film and thus the crystallization always the same temperature, for example 1600-2400 ° C, the crystal sits on a lowering device 39, which moves downwards in accordance with the growth rate.
  • a crystal nucleus is needed, which serves as a basis for growth.
  • Alternative connections and temperatures are conceivable.
  • FIG. 7 will describe a schematic apparatus 40 for growing crystals 41 according to the Czochralsky method.
  • the starting material for example SrAl 2 O 4 : Eu, Dy or Sr 4 Al 14 O 25 : Eu, Dy
  • the melt 43 is in melt 43.
  • the crucible 42 and the melt 43 are kept at a constant temperature by means of heating elements 44 held for example 1600-2400 ° C.
  • an oriented seed crystal attached to a slowly rotating cooled metal rod 45 is dipped in the melt 43 and then slowly pulled up again. It should be noted that the Contact to the melt 43 does not break off.
  • the melt solidifies at the interface to the crystal nucleus or to the crystal 41, and crystallizes out.
  • the crystal 41 grows.
  • the metal rod 45 is pulled up in accordance with the growth speed of the crystal 41.
  • the ambient temperature must be kept constant at, for example, 1000-2000 ° C. There are also other connections and temperatures possible.

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  • Crystals, And After-Treatments Of Crystals (AREA)
EP07117131A 2007-09-25 2007-09-25 Pierre décorative Withdrawn EP2042052A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07117131A EP2042052A1 (fr) 2007-09-25 2007-09-25 Pierre décorative

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07117131A EP2042052A1 (fr) 2007-09-25 2007-09-25 Pierre décorative

Publications (1)

Publication Number Publication Date
EP2042052A1 true EP2042052A1 (fr) 2009-04-01

Family

ID=39186174

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07117131A Withdrawn EP2042052A1 (fr) 2007-09-25 2007-09-25 Pierre décorative

Country Status (1)

Country Link
EP (1) EP2042052A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB402777A (en) * 1932-02-27 1933-11-27 Frederic William Vesey Fitzger Improved means for and methods of manufacturing, utilising and applying phosphorescent compounds
JPS5532717A (en) * 1978-08-25 1980-03-07 Tdk Corp Jewelly material
EP0467044A2 (fr) * 1990-06-29 1992-01-22 General Electric Company Scintillateur compensé par piège à trous

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB402777A (en) * 1932-02-27 1933-11-27 Frederic William Vesey Fitzger Improved means for and methods of manufacturing, utilising and applying phosphorescent compounds
JPS5532717A (en) * 1978-08-25 1980-03-07 Tdk Corp Jewelly material
EP0467044A2 (fr) * 1990-06-29 1992-01-22 General Electric Company Scintillateur compensé par piège à trous

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