X-RAY SHIELDING GLASS AND GLASS COMPONENT

• Main Authors: SAKAI TAKUYA, YAMAMOTO YOSHINORI, TOMITA KOSUKE, NAKAYAMA TOMOYUKI
• Format: Patent
• Language: English; Japanese
• Published: 08.04.2021
• Subjects: CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; DECONTAMINATION ARRANGEMENTS THEREFOR; GLASS; JOINING GLASS TO GLASS OR OTHER MATERIALS; METALLURGY; MINERAL OR SLAG WOOL; NUCLEAR ENGINEERING; NUCLEAR PHYSICS; PHYSICS; PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULARRADIATION OR PARTICLE BOMBARDMENT; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS; TREATING RADIOACTIVELY CONTAMINATED MATERIAL

To provide an X-ray shielding glass that has high shielding capability for X-rays having a tube voltage of 150 kV or less.SOLUTION: Provided is an X-ray shielding glass, and in which, characterized, the glass has a composition containing B2O3: 15 to 25 mass%, La2O3: 7 to 50 mass%, Gd2O3: 7 to 50 mass%, WO3: 10 to 25 mass%, SiO2: 0 to 7 mass%, ZrO2: 0 to 10 mass%, Nb2O5: 0 to 8 mass%, Ta2O5: 0 to 10 mass%, Bi2O3: 0 to 5 mass %, CeO2: 0 to 3 mass% and Sb2O3: 0 to 1 mass%, and does not contain ZnO, the total contained amount of La2O3 and Gd2O3 is 45 to 65 mass%, and, in the glass having a thickness set to 3 mm, the X-ray transmittance of the X-ray tube at a tube voltage of 60 kV is 0.0050% or less, and the X-ray transmittance of the X-ray tube at a tube voltage of 100 kV is 0.1500% or less.SELECTED DRAWING: None 【課題】管電圧が１５０ｋＶ以下のＸ線に対して高い遮蔽能力を有するＸ線遮蔽ガラスを提供する。【解決手段】Ｘ線遮蔽ガラスであって、Ｂ２Ｏ３：１５〜２５質量％、Ｌａ２Ｏ３：７〜５０質量％、Ｇｄ２Ｏ３：７〜５０質量％、ＷＯ３：１０〜２５質量％、ＳｉＯ２：０〜７質量％、ＺｒＯ２：０〜１０質量％、Ｎｂ２Ｏ５：０〜８質量％、Ｔａ２Ｏ５：０〜１０質量％、Ｂｉ２Ｏ３：０〜５質量％、ＣｅＯ２：０〜３質量％、及びＳｂ２Ｏ３：０〜１質量％を含有する組成を有し、ＺｎＯを含有せず、Ｌａ２Ｏ３及びＧｄ２Ｏ３の合計含有量が４５〜６５質量％であり、厚み３ｍｍとした当該ガラスにおいて、Ｘ線管の管電圧６０ｋＶのＸ線透過率が０．００５０％以下であり、且つ、Ｘ線管の管電圧１００ｋＶのＸ線透過率が０．１５００％以下である、ことを特徴とする、Ｘ線遮蔽ガラス。【選択図】なし