GLASS CERAMICS

• Main Authors: ETO SHUNICHI, MUNEDA YUKIO
• Format: Patent
• Language: English; Japanese
• Published: 02.12.2021
• Subjects: CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; GLASS; JOINING GLASS TO GLASS OR OTHER MATERIALS; METALLURGY; MINERAL OR SLAG WOOL; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS

To provide a machinable glass ceramics that has a high reflectance to ultraviolet having a wavelength of 400 nm compared to conventional technique.SOLUTION: A glass ceramics is provided, containing by mass%, SiO2: 35 to 60%, Al2O3: 10 to 21%, MgO: 10 to 21%, K2O: 5 to 14%, B2O3: 3 to 11%, ZrO2: 1 to 7% and F: 1 to 7%, the number of fluorine phlogopite crystals present in the matrix of borosilicate glass being 0.30 to 0.45 pieces/μm2.SELECTED DRAWING: Figure 2 【課題】従来技術と比較して４００ｎｍの反射率が高いマシナブルガラスセラミックス得る。【解決手段】質量％で、ＳｉＯ２：３５〜６０％、Ａｌ２Ｏ３：１０〜２１％、ＭｇＯ：１０〜２１％、Ｋ２Ｏ：５〜１４％、Ｂ２Ｏ３：３〜１１％、ＺｒＯ２：１〜７％およびＦ：１〜７％を含み、ホウケイ酸ガラスのマトリックス中に存在するフッ素金雲母結晶の個数が、０．３０〜０．４５個／μｍ２である、ガラスセラミックス。【選択図】 図２