JPWO2010073712A1 - 透光性多結晶材料及びその製造方法 - Google Patents
透光性多結晶材料及びその製造方法 Download PDFInfo
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- JPWO2010073712A1 JPWO2010073712A1 JP2010543918A JP2010543918A JPWO2010073712A1 JP WO2010073712 A1 JPWO2010073712 A1 JP WO2010073712A1 JP 2010543918 A JP2010543918 A JP 2010543918A JP 2010543918 A JP2010543918 A JP 2010543918A JP WO2010073712 A1 JPWO2010073712 A1 JP WO2010073712A1
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- single crystal
- polycrystalline material
- magnetic field
- crystal particles
- light
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- LSGOVYNHVSXFFJ-UHFFFAOYSA-N vanadate(3-) Chemical compound [O-][V]([O-])([O-])=O LSGOVYNHVSXFFJ-UHFFFAOYSA-N 0.000 claims description 22
- VSIIXMUUUJUKCM-UHFFFAOYSA-D pentacalcium;fluoride;triphosphate Chemical compound [F-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O VSIIXMUUUJUKCM-UHFFFAOYSA-D 0.000 claims description 20
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- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 claims description 4
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- HIQSCMNRKRMPJT-UHFFFAOYSA-J lithium;yttrium(3+);tetrafluoride Chemical class [Li+].[F-].[F-].[F-].[F-].[Y+3] HIQSCMNRKRMPJT-UHFFFAOYSA-J 0.000 description 1
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Abstract
Description
3…電磁石
Claims (15)
- 希土類元素を含む複数の光学的に異方性の単結晶粒子を成形、焼成して得られた透光性の多結晶体よりなり、各該単結晶粒子の結晶方向が一方向に揃った多結晶構造を有することを特徴とする透光性多結晶材料。
- 前記単結晶粒子がアパタイト系化合物又はバナデート系化合物よりなる請求項1に記載の透光性多結晶材料。
- 前記アパタイト系化合物がα5(βO4)3γ2(α:Ca又はSr、β:P又はV、γ:OH又はF)の化学式で示されるフッ素アパタイト、水酸アパタイト又はバナジウムアパタイトである請求項2に記載の透光性多結晶材料。
- 前記バナデート系化合物がYVO4の化学式で示されるイットリウムオルソバナデート、GdVO4の化学式で示されるガドリニウムオルソバナデート及びLuVO4の化学式で示されるルテチウムオルソバナデートよりなる群から選ばれる一種である請求項2に記載の透光性多結晶材料。
- 前記希土類元素が、セリウム(Ce)、プラセオジウム(Pr)、ネオジム(Nd)、プロメチウム(Pm)、サマリウム(Sm)、テルビウム(Tb)、ジスプロシウム(Dy)、ホロミウム(Ho)、エルビウム(Er)、ツリウム(Tm)及びイッテルビウム(Yb)よりなる群から選ばれる少なくとも一種である請求項1に記載の透光性多結晶材料。
- 光学材料に用いられる請求項1に記載の透光性多結晶材料。
- 希土類元素が添加された光学的に異方性の単結晶粒子を含む原料粉末を溶液中に分散させて、懸濁液を準備する準備工程と、
磁場空間でスリップキャスティングを行うことにより、前記懸濁液から成形体を得る成形工程と、
前記成形体を焼成して、結晶方位が制御された多結晶構造を有する透光性の多結晶体よりなる透光性多結晶材料を得る焼成工程と、を備え、
前記成形工程で、前記単結晶粒子が所定の磁気異方性を発揮するように温度制御しつつ、該単結晶粒子における磁化容易軸の方向に応じて静磁場及び回転磁場のうちの一方を選択して印加し、
前記焼成工程で、前記成形体を1600〜1900Kの温度で一次焼結して一次焼結体を得る一次焼結工程と、該一次焼結体を1600〜1900Kの温度で熱間等方加圧焼結する二次焼結工程とを順に実施することを特徴とする透光性多結晶材料の製造方法。 - 前記単結晶粒子がアパタイト系化合物又はバナデート系化合物よりなる請求項7に記載の透光性多結晶材料の製造方法。
- 前記成形工程で、前記単結晶粒子における磁化容易軸がc軸である場合は静磁場を印加する請求項7に記載の透光性多結晶材料の製造方法。
- 前記成形工程で、前記単結晶粒子における磁化容易軸がa軸である場合は鉛直方向を回転軸とする回転磁場を印加する請求項7に記載の透光性多結晶材料の製造方法。
- 前記単結晶粒子がアパタイト系化合物よりなり、かつ前記希土類元素がセリウム(Ce)、プラセオジウム(Pr)、ネオジム(Nd)、テルビウム(Tb)、ジスプロシウム(Dy)及びホロミウム(Ho)よりなる群から選ばれる少なくとも一種である場合、又は
前記単結晶粒子がバナデート系化合物よりなり、かつ前記希土類元素がプロメチウム(Pm)、サマリウム(Sm)、エルビウム(Er)、ツリウム(Tm)及びイッテルビウム(Yb)よりなる群から選ばれる少なくとも一種である場合であって、
前記成形工程で静磁場を印加する請求項9に記載の透光性多結晶材料の製造方法。 - 前記単結晶粒子がアパタイト系化合物よりなり、かつ前記希土類元素がプロメチウム(Pm)、サマリウム(Sm)、エルビウム(Er)、ツリウム(Tm)及びイッテルビウム(Yb)よりなる群から選ばれる少なくとも一種である場合、又は
前記単結晶粒子がバナデート系化合物よりなり、かつ前記希土類元素がセリウム(Ce)、プラセオジウム(Pr)、ネオジム(Nd)、テルビウム(Tb)、ジスプロシウム(Dy)及びホロミウム(Ho)よりなる群から選ばれる少なくとも一種である場合であって、
前記成形工程で回転磁場を印加する請求項10に記載の透光性多結晶材料の製造方法。 - 前記アパタイト系化合物がα5(βO4)3γ2(α:Ca又はSr、β:P又はV、γ:OH又はF)の化学式で示されるフッ素アパタイト、水酸アパタイト又はバナジウムアパタイトである請求項8に記載の透光性多結晶材料の製造方法。
- 前記バナデート系化合物がYVO4の化学式で示されるイットリウムオルソバナデート、GdVO4の化学式で示されるガドリニウムオルソバナデート及びLuVO4の化学式で示されるルテチウムオルソバナデートよりなる群から選ばれる一種である請求項8に記載の透光性多結晶材料の製造方法。
- 前記成形工程で印加する磁場の強度が1T(テスラ)以上であり、該成形工程で前記単結晶粒子の結晶温度が300K以下となるように温度制御する請求項7に記載の透光性多結晶材料の製造方法。
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