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Decorative glass article

A technology for decorations and glass products, used in clothing, applications, jewelry, etc., can solve the problems of easy damage, harmful crystal glass, etc., and achieve the effects of high dispersion, excellent fire, and excellent brightness

Pending Publication Date: 2021-11-12
NIPPON ELECTRIC GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, crystal glass containing lead is harmful to the human body and has the problem of being easily damaged, so crystal glass substantially free of lead has been developed (Patent Documents 1 and 2)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0042] Hereinafter, although the decorative glass article of this invention is demonstrated in detail using an Example, this invention is not limited to a following Example.

[0043] Table 1 shows Examples (No. 1-7) and Comparative Examples (No. 8-9) of the present invention.

[0044] [Table 1]

[0045]

[0046] First, raw material batches were prepared by blending the raw materials to each glass composition shown in Table 1. The obtained batch of raw materials was melted until uniform, and quenched to obtain a glass sample (decorative glass article). In addition, the melting temperature was 1500-2000 degreeC in sample No. 1-7, and it was 1400-1500 degreeC in sample No. 8-9. After annealing the obtained glass sample near the glass transition temperature (350-700°C), the density, refractive index (nd), Abbe number (νd), coloring degree (λ 5 ) Determination and appearance evaluation (brightness, fire, hue).

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Abstract

The present invention provides a decorative glass article having a high refractive index and high dispersibility and having excellent brilliance and fire. The decorative glass article is characterized by containing, in mol%, 10-70% of La2O3, 10-90% of Nb2O5, 0-40% of B2O3, and 0-50% of TiO2, and having a refractive index of 2.0 or more and an Abbe number of 50 or less.

Description

technical field [0001] The present invention relates to a decorative glass article suitable for decorations such as rings, pendants, earrings, and bracelets. Background technique [0002] According to the definition of the Japan Glass Industry Association, crystal glass is "glass containing lead oxide as the main component and glass containing potassium oxide, barium oxide, titanium oxide, etc. as the main component, with high transparency and a refractive index nd of 1.52 or more. It is characterized by its beautiful brilliance and crisp tone." These crystal glasses are excellent in brilliance, transparency, echo, thickness, workability, etc., and can be used for decorative items (jewel accessories, artworks, tableware, etc.). [0003] However, since crystal glass containing lead is harmful to the human body and is easily damaged, crystal glass substantially free of lead has been developed (Patent Documents 1 and 2). In addition, in terms of high refractive index, it is k...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A44C27/00C03C3/12C03C3/15C03C3/155
CPCC03C3/155A44C17/008A44C27/001C03C4/02C03C3/122C03C3/15C03C3/093C03C3/089
Inventor 藤田直树西田晋作
Owner NIPPON ELECTRIC GLASS CO LTD
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