Nippon Electric Glass has filed a patent for a crystallized glass with specific composition and properties. The glass contains a combination of SiO2, Al2O3, Li2O, Na2O, K2O, MgO, CaO, SrO, BaO, ZnO, SnO2, ZrO2, TiO2, and P2O5. It has a degree of crystallinity ranging from 1% to 95% and an average visible light transmittance of 50% or more at a thickness of 0.8 mm and a wavelength of 380 to 780 nm. The glass also features a compression stress layer on its surface. GlobalData’s report on Nippon Electric Glass gives a 360-degree view of the company including its patenting strategy. Buy the report here.
Smarter leaders trust GlobalData
Discover B2B Marketing That Performs
Combine business intelligence and editorial excellence to reach engaged professionals across 36 leading media platforms.
According to GlobalData’s company profile on Nippon Electric Glass, Hydrogen storage alloys was a key innovation area identified from patents. Nippon Electric Glass's grant share as of September 2023 was 25%. Grant share is based on the ratio of number of grants to total number of patents.
A recently filed patent (Publication Number: US20230312403A1) describes a crystallized glass with specific composition and properties. The glass contains varying percentages of SiO2, Al2O3, Li2O, Na2O, K2O, MgO, CaO, SrO, BaO, ZnO, SnO2, ZrO2, TiO2, and P2O5. The glass has a crystallinity ranging from 1% to 95% and an average visible light transmittance of 50% or greater at a thickness of 0.8 mm and a wavelength of 380 to 780 nm. Additionally, the glass has a compression stress layer formed on its surface.
The patent claims that the crystallized glass does not contain As2O3 and PbO. It also states that the glass can precipitate crystals such as ß-eucryptite solid solution, ß-spodumene solid solution, and zirconia. The average crystallite size of the glass is 1 µm or less, and it has a Vickers hardness value of 540 or greater. The glass also exhibits a flexural strength of 100 MPa or greater and a drop height of 5 mm or greater. Its thermal expansion coefficient ranges from 0 to 120×10-7/° C. at 30 to 380° C., and its Young's modulus is 80 GPa or greater.
The patent further describes two methods for manufacturing the crystallized glass. In the first method, the glass is prepared with specific composition and crystallinity and then immersed in a molten salt of 400° C. or higher to obtain a glass with a compression stress layer on its surface. In the second method, the glass is prepared with similar composition and crystallinity but immersed in a molten salt of 500 to 1000° C. to achieve the desired compression stress layer.
Another claim in the patent focuses specifically on a crystallized glass where zirconia crystals are precipitated. This glass also has an average visible light transmittance of 50% or greater at a thickness of 0.8 mm and a wavelength of 380 to 780 nm. Additionally, a compression stress layer is formed on its surface. The crystallinity of this glass is less than 40%, and it contains the same composition as mentioned in the previous claims.
In summary, the patent describes a specific composition and manufacturing methods for a crystallized glass with various desirable properties such as high light transmittance, hardness, flexural strength, and thermal expansion coefficient. The glass can also precipitate specific crystals and has a compression stress layer on its surface.
To know more about GlobalData’s detailed insights on Nippon Electric Glass, buy the report here.
Data Insights
From
The gold standard of business intelligence.
Blending expert knowledge with cutting-edge technology, GlobalData’s unrivalled proprietary data will enable you to decode what’s happening in your market. You can make better informed decisions and gain a future-proof advantage over your competitors.
GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.
GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
