BARIUM TITANATE NANOCRYSTAL

• Main Authors: YANO SEIICHI, MIZUTANI HIDETO, HOSOKURA TADASHI, EZOE RYOTA, MURATA KENJI
• Format: Patent
• Language: English; Japanese
• Published: 19.07.2022
• Subjects: AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; CRYSTAL GROWTH; INORGANIC CHEMISTRY; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; METALLURGY; NANOTECHNOLOGY; PERFORMING OPERATIONS; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; REFINING BY ZONE-MELTING OF MATERIAL; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; SINGLE-CRYSTAL-GROWTH; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; TRANSPORTING; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL

To improve the aggregativity of barium titanate nanocrystals.SOLUTION: A barium titanate nanocrystal has a squareness of 0.8 or more. The squareness is obtained by (L×W)/(2×S0), with the absolute maximum length Lnm, diagonal width Wnm and actual area S0 nm2 of the crystal, based on an image of the crystal by transmission electron microscopy. The length Ls of one side of a square in the size corresponding to the actual area S0 nm2 is more than 20 nm to 100 nm or less. The length Ls has a coefficient of variation of 20% or less.SELECTED DRAWING: Figure 2 【課題】チタン酸バリウムナノ結晶の集合性を高める。【解決手段】チタン酸バリウムナノ結晶の四角度が、０．８以上である。四角度は、上記の結晶の透過型電子顕微鏡による像により求められる上記の結晶の絶対最大長Ｌｎｍ、対角幅Ｗｎｍおよび実面積Ｓ０ｎｍ２を用いて、（Ｌ×Ｗ）／（２×Ｓ０）により得られる。上記の実面積Ｓ０ｎｍ２に相当する大きさの正方形の一辺の長さＬｓが、２０ｎｍを超え、１００ｎｍ以下である。上記の長さＬｓの変動係数が、２０％以下である。【選択図】図２