{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1390282680194352000.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.2109/jcersj1950.88.9"}},{"identifier":{"@type":"NDL_BIB_ID","@value":"2168334"}},{"identifier":{"@type":"URI","@value":"http://id.ndl.go.jp/bib/2168334"}},{"identifier":{"@type":"URI","@value":"https://ndlsearch.ndl.go.jp/books/R000000004-I2168334"}},{"identifier":{"@type":"URI","@value":"http://www.jstage.jst.go.jp/article/jcersj1950/88/1013/88_1013_9/_pdf"}},{"identifier":{"@type":"NAID","@value":"110002310673"}}],"dc:title":[{"@language":"en","@value":"Change Processes from Potassium Tetratitanate Fibers to Potassium Hexatitanate Fibers and through Hydrated Titania Fibers to Anatase Fibers"},{"@value":"四チタン酸カリウム繊維から六チタン酸カリウム繊維及びアナターゼ繊維への変換過程"},{"@language":"ja-Kana","@value":"シチタンサン カリウム センイ カラ ロクチタンサン カリウム センイ オヨビ"}],"dc:language":"ja","description":[{"type":"abstract","notation":[{"@language":"en","@value":"The moisture absorption of potassium tetratitanate (K<sub>2</sub>Ti<sub>4</sub>O<sub>9</sub>) fibers and change processes from potassium tetratitanate fibers to potassium hexatitanate (K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub>) fibers and through hydrated titania (TiO<sub>2</sub>⋅<i>n</i>H<sub>2</sub>O) fibers to anatase fibers are investigated.<br>The moisture absorption of K<sub>2</sub>Ti<sub>4</sub>O<sub>9</sub> fibers under normal atmospheric conditions was divided into two kinds; one increased up to 4.8wt% for 900h, and the other increased up to only 0.8wt% for 900h, although they scarcely increased till 100h.<br>The order of decreasing extractability of potassium from the K<sub>2</sub>Ti<sub>4</sub>O<sub>9</sub> fibers in various acid solutions was as follows: HCl>HNO<sub>3</sub>≈H<sub>2</sub>SO<sub>4</sub>>(COOH)<sub>2</sub>>HCOOH>CH<sub>3</sub>COOH. It was found that an HCl solution is good for extracting all potassium ions, and a CH<sub>3</sub>COOH solutionis suitable for extracting partial potassium ions in the K<sub>2</sub>Ti<sub>4</sub>O<sub>9</sub> fibers, and the quantity of extraction can be controlled by the reaction time and the concentration of acid solutions.<br>By heating after the potassium extraction, the K<sub>2</sub>Ti<sub>4</sub>O<sub>9</sub> fibers were changed into various fibers such as K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub>, hydrated titania, or anatase. However, the anatase fibers were obtained from the hydrated titania phase through an intermediate phase.<br>The thermal analysis of the hydrated titania fibers, was characterized by four endothermic reactions at about 100°, 200°, 350° and 550°C accompanying with the dehydration, and by three exothermic reactions at about 380°, 800° and 1000°C related to the phase changes into the intermediate phase, anatase and rutile, respectively."},{"@value":"四チタン酸カリウム繊維の吸湿性には, 育成条件により900時間までに4.8wt%と0.8wt%の重量増加を示す2種類が存在する. 吸湿性の大きい四チタン酸カリウム繊維から種々酸性水溶液を用いたカリウムイオンの溶出力はHCl>HNO<sub>3</sub>≈H<sub>2</sub>SO<sub>4</sub>>(COOH)<sub>2</sub>>HCOOH>CH<sub>3</sub>COOHの順序であった. したがって, 本繊維からカリウム溶出量を制御して最も安定な相である六チタン酸カリウム組成へ変換する場合はCH<sub>3</sub>COOH水溶液を用いるのが適当である. 六チタン酸カリウム繊維を得るにはカリウムイオン溶出後加熱処理をすればよい. アナターゼ繊維への変換はHCl水溶液が適当で, 全カリウムを溶出させると結晶質チタニア水和物となり, このチタニア水和物を加熱すると中間相を経てアナターゼ繊維となる. チタニア水和物の熱分析は, 100°, 200°, 350°, 550℃の4段階の脱水減量に伴う吸熱反応と水和物から中間相, アナターゼ, ルチルへの相転移に関係した380°, 800°, 1000℃における発熱反応が観測された. また, アナターゼまでは繊維形態を保持しているが, ルチル相では粉末化した."}],"abstractLicenseFlag":"disallow"}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1030003658311022211","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"70113529"},{"@type":"NRID","@value":"1000070113529"},{"@type":"NRID","@value":"9000242444333"},{"@type":"NRID","@value":"9000020654734"},{"@type":"NRID","@value":"9000021868786"},{"@type":"NRID","@value":"9000007287015"},{"@type":"NRID","@value":"9000020187227"},{"@type":"NRID","@value":"9000020186651"},{"@type":"NRID","@value":"9000001636958"},{"@type":"NRID","@value":"9000265537677"},{"@type":"NRID","@value":"9000020186574"},{"@type":"NRID","@value":"9000020800252"},{"@type":"NRID","@value":"9000020187510"},{"@type":"NRID","@value":"9000259290247"},{"@type":"NRID","@value":"9000258531459"},{"@type":"NRID","@value":"9000256040393"},{"@type":"NRID","@value":"9000016329200"},{"@type":"NRID","@value":"9000261656052"},{"@type":"NRID","@value":"9000016386211"},{"@type":"NRID","@value":"9000237783142"},{"@type":"NRID","@value":"9000016891562"}],"foaf:name":[{"@language":"en","@value":"OHTA Nobuhiro"},{"@language":"ja","@value":"太田 進啓"}],"jpcoar:affiliationName":[{"@language":"ja","@value":"大塚化学薬品 (株)"},{"@language":"en","@value":"Otsuka Chemical Co. Ltd."}]},{"@id":"https://cir.nii.ac.jp/crid/1410290696489096192","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000003199523"}],"foaf:name":[{"@language":"en","@value":"FUJUIKI Yoshinori"},{"@language":"ja","@value":"藤木 良規"}],"jpcoar:affiliationName":[{"@language":"en","@value":"National Institute for Researches in Inorganic Materials"},{"@language":"ja","@value":"無機材質研究所"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00090255"},{"@type":"EISSN","@value":"18842127"},{"@type":"NDL_BIB_ID","@value":"000000023660"},{"@type":"ISSN","@value":"00090255"},{"@type":"LISSN","@value":"00090255"},{"@type":"NCID","@value":"AN00245650"}],"prism:publicationName":[{"@language":"en","@value":"Journal of the Ceramic Association, Japan"},{"@language":"ja","@value":"窯業協會誌"},{"@language":"en","@value":"Journal of the Ceramic Association, Japan"},{"@language":"ja","@value":"窯業協會誌"}],"dc:publisher":[{"@language":"en","@value":"The Ceramic Society of Japan"},{"@language":"ja","@value":"公益社団法人 日本セラミックス協会"}],"prism:publicationDate":"1980","prism:volume":"88","prism:number":"1013","prism:startingPage":"9","prism:endingPage":"16"},"reviewed":"false","url":[{"@id":"http://id.ndl.go.jp/bib/2168334"},{"@id":"https://ndlsearch.ndl.go.jp/books/R000000004-I2168334"},{"@id":"http://www.jstage.jst.go.jp/article/jcersj1950/88/1013/88_1013_9/_pdf"}],"availableAt":"1980","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=Potassium%20extraction","dc:title":"Potassium extraction"},{"@id":"https://cir.nii.ac.jp/all?q=Potassium%20tetratitanate%20fiber","dc:title":"Potassium tetratitanate fiber"},{"@id":"https://cir.nii.ac.jp/all?q=Anatase%20fiber","dc:title":"Anatase fiber"},{"@id":"https://cir.nii.ac.jp/all?q=Hydrated%20titania%20fiber","dc:title":"Hydrated titania fiber"}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1390001204579365760","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"A CESIUM IMMOBILIZATION FROM AN AQUEOUS SOLUTION USING THE CRYSTALLINE ADSORBER OF HYDROUS TITANIUM DIOXIDE FIBERS"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001205277831424","@type":"Article","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Synthesis and Evaluation of Potassium Hexatitanate Fibers with Negligible Leachability"},{"@value":"低カリウム溶出性六チタン酸カリウム繊維の合成と評価"},{"@language":"ja-Kana","@value":"テイ カリウム ヨウシュツセイ 6 チタンサン カリウム センイ ノ ゴウセイ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001277347857792","@type":"Article","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Ion-Exchange Properties of Tetratitanic Acid with a Layer Structure for Alkali Metal Ions"},{"@language":"ja","@value":"層構造をもつ四チタン酸のアルカリ金属イオン交換反応特性"},{"@language":"ja-Kana","@value":"ソウ コウゾウ オ モツ 4 チタンサン ノ アルカリ キンゾク イオン コウカン ハンノウ トクセイ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282679101295872","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Sorption of ammonia/ammonium ion on crystalline hydrous titanium dioxide fibers."}]},{"@id":"https://cir.nii.ac.jp/crid/1520009410325311872","@type":"Article","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@value":"繊維状水和二酸化チタンとアンモニウムイオンの反応"},{"@language":"ja-Kana","@value":"センイジョウ スイワ 2サンカ チタン ト アンモニウムイオン ノ ハンノウ"}]},{"@id":"https://cir.nii.ac.jp/crid/1520009410350103296","@type":"Article","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@value":"繊維状水和二酸化チタンとアンモニアの反応"},{"@language":"ja-Kana","@value":"センイジョウ スイワ 2サンカ チタン ト アンモニア ノ ハンノウ"}]}],"dataSourceIdentifier":[{"@type":"JALC","@value":"oai:japanlinkcenter.org:0032468968"},{"@type":"NDL_SEARCH","@value":"oai:ndlsearch.ndl.go.jp:R000000004-I2168334"},{"@type":"CROSSREF","@value":"10.2109/jcersj1950.88.9"},{"@type":"CIA","@value":"110002310673"},{"@type":"CROSSREF","@value":"10.1246/bcsj.57.1331_references_DOI_8cY0G2pG15DDnkMa5po9VmNnQ9n"},{"@type":"CROSSREF","@value":"10.1246/cl.1980.1023_references_DOI_8cY0G2pG15DDnkMa5po9VmNnQ9n"}]}