JP6345676B2 - 近赤外応力発光材料及び近赤外応力発光体並びに近赤外応力発光材料の製造方法 - Google Patents
近赤外応力発光材料及び近赤外応力発光体並びに近赤外応力発光材料の製造方法 Download PDFInfo
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- AEBZCFFCDTZXHP-UHFFFAOYSA-N europium(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Eu+3].[Eu+3] AEBZCFFCDTZXHP-UHFFFAOYSA-N 0.000 description 1
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- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
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- VQMWBBYLQSCNPO-UHFFFAOYSA-N promethium atom Chemical compound [Pm] VQMWBBYLQSCNPO-UHFFFAOYSA-N 0.000 description 1
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- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 description 1
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 description 1
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- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 description 1
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7783—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals one of which being europium
- C09K11/7792—Aluminates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K2/00—Non-electric light sources using luminescence; Light sources using electrochemiluminescence
- F21K2/04—Non-electric light sources using luminescence; Light sources using electrochemiluminescence using triboluminescence; using thermoluminescence
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
- G01L1/248—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet using infrared
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/70—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light mechanically excited, e.g. triboluminescence
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Description
(2)前記アルミン酸塩は、一般式MAl2O4で表されるアルミン酸塩(ただし、MはMg、Ca、Sr、Baのいずれか)であること。
(3)前記Eu2+は、前記一般式MAl2O4で表されるアルミン酸塩のMの0.25〜10%を置換する濃度で共添加されていること。
(4)前記Cr3+は、前記一般式MAl2O4で表されるアルミン酸塩のMの0.25〜10%を置換する濃度で共添加されていること。
(5)前記希土類金属元素のイオン又はイオン群は、前記一般式MAl2O4で表されるアルミン酸塩のMの0.25〜10%を置換する濃度で共添加されていること。
(6)前記希土類金属元素のイオンがNd3+であること。
(7)前記Nd3+は、前記一般式MAl2O4で表されるアルミン酸塩のMの0.25〜10%を置換する濃度で共添加されていること。
まず、近赤外応力発光材料の調製について説明する。ここではSrAl2O4:Eu0.01Cr0.01Nd0.01の調製を一例として示すが、その他の組成についても以下に示す調製方法と略同様にして調製可能である。
本試験では、Eu2+(2価のユウロピウム)及びCr3+(3価のクロム)に加え、どのような希土類金属イオン(Q)をアルミン酸ストロンチウム(SrAl2O4)に共添加するのが有効かについて、前述の製造方法に従って種々試験サンプルを作成し、荷重を付与して検討を行った。
次に、先の試験にて近赤外発光性を示したSc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, LuのうちNdに着目し、Eu2+、Cr3+、Nd3+の組合せにおける近赤外発光性の違いについて検証を行った。
に共添加することが、高い近赤外応力発光・残光材料を得る有効な手段であることが示された。
次に、SAOEuCrNdに着目し、Eu2+、Cr3+、Nd3+の濃度をそれぞれ変化させた際の近赤外発光性及び残光性の違いについて検討を行った。その結果を図4に示す。
次に、本実施形態に係る近赤外応力発光材料や残光材料が、近赤外光領域(生体透過光波長:650〜1100nm、蛍光灯に含まれない波長領域:850nm以上)に発光を持つことについて確認を行った。その結果を図5に示す。
次に、本実施形態に係る近赤外応力発光材料が、近赤外残光材料として機能するものであるか確認を行った。すなわち、本実施形態に係る近赤外応力発光材料が、近赤外光領域(生体透過光波長:650〜1100nm、蛍光灯に含まれない波長領域:850nm以上)に残光を持つことについて確認を行った。
次に、本実施形態に係る近赤外応力発光体(近赤外残光体)が、近赤外光領域(生体透過光波長:650〜1100nm、蛍光灯に含まれない波長領域:850nm以上)に応力発光を持つことについて確認を行った。
次に、本実施形態に係る近赤外応力発光体(近赤外残光体)を用いる事で、その残光が、生体を透過可能であるかについて検証を行った。その様子及び結果を図8に示す。
次に、本実施形態に係る近赤外応力発光体を用い、その近赤外応力発光性に由来する応力発光や、近赤外残光性に由来する残光が生体透過を実現しうることについて検証を行った。
本試験では、本実施形態に係る近赤外応力発光体(近赤外応力発光材料)からの近赤外応力発光が、暗室・暗幕が必要という従来の課題を解決し、蛍光灯下・緑色光源下(約500 ルクス)の明環境でも計測できることについて検証を行った。その様子及び結果を図10に示す。
Claims (13)
- 一般式MAl 2 O 4 で表されるアルミン酸塩(ただし、MはMg、Ca、Sr、Baのいずれか)に、Eu2+と、Cr3+と、Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Luから選ばれる少なくともいずれか1つの希土類金属元素のイオン又はイオン群と、が共添加されてなる近赤外応力発光材料。
- 前記Eu2+は、前記一般式MAl2O4で表されるアルミン酸塩のMの0.25〜10%を置換する濃度で共添加されていることを特徴とする請求項1に記載の近赤外応力発光材料。
- 前記Cr3+は、前記一般式MAl2O4で表されるアルミン酸塩のMの0.25〜10%を置換する濃度で共添加されていることを特徴とする請求項1又は請求項2に記載の近赤外応力発光材料。
- 前記希土類金属元素のイオン又はイオン群は、前記一般式MAl2O4で表されるアルミン酸塩のMの0.25〜10%を置換する濃度で共添加されていることを特徴とする請求項1〜3いずれか1項に記載の近赤外応力発光材料。
- 前記希土類金属元素のイオンがNd3+であることを特徴とする請求項1〜4いずれか1項に記載の近赤外応力発光材料。
- 前記Nd3+は、前記一般式MAl2O4で表されるアルミン酸塩のMの0.25〜10%を置換する濃度で共添加されていることを特徴とする請求項5に記載の近赤外応力発光材料。
- 一般式MAl 2 O 4 で表されるアルミン酸塩(ただし、MはMg、Ca、Sr、Baのいずれか)に、Eu2+と、Nd3+とが共添加されてなる近赤外応力発光材料。
- 請求項1〜7いずれか1項に記載の近赤外応力発光材料を所定のマトリクス材料中に分散させて形成した近赤外応力発光体。
- 近赤外波長以外の波長を有する電磁波であって前記近赤外応力発光材料が放射する電磁波により励起され、近赤外波長を有する電磁波を放射する波長変換物質が、前記マトリクス材料中に添加されていることを特徴とする請求項8に記載の近赤外応力発光体。
- 後記焼成工程を経ることにより一般式MAl 2 O 4 で表されるアルミン酸塩(ただし、MはMg、Ca、Sr、Baのいずれか)を構成する母体材料構成原料と、前記アルミン酸塩にEu2+を供給するEu2+供給原料と、前記アルミン酸塩にCr3+を供給するCr3+供給原料と、前記アルミン酸塩にSc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Luから選ばれる少なくともいずれか1つの希土類金属元素のイオン又はイオン群を供給する希土類金属元素イオン供給原料と、を混合して原料混合物を生成する混合工程と、
前記混合工程にて生成した原料混合物を焼成してアルミン酸塩に、Eu2+と、Cr3+と、前記希土類金属元素のイオン又はイオン群と、が共添加されてなる近赤外応力発光材料を生成する焼成工程と、を有することを特徴とする近赤外応力発光材料の製造方法。 - Eu2+と、Cr3+と、Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Luから選ばれる少なくともいずれか1つの希土類金属元素のイオン又はイオン群との、一般式MAl 2 O 4 で表されるアルミン酸塩(ただし、MはMg、Ca、Sr、Baのいずれか)中における応力発光材料の近赤外線発光中心としての共添加状態での使用。
- 請求項1〜7いずれか1項に記載の近赤外応力発光材料の残光材料としての使用。
- 請求項8又は9に記載の近赤外応力発光体の残光体としての使用。
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