{"@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/1872272492426852480.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1016/0022-3093(96)00370-5"}}],"dc:title":[{"@value":"Conversion of silica gel and silica glass mixed with various metal oxides into quartz"}],"description":[{"notation":[{"@value":"Mixtures of silica gel and various metal oxides were heated at temperatures within the range of 500 to 1200°C for 1 h. When mixtures of silica gel and intentional additives such as Li 2 CO 3 , MgO, CaCO 3 , SrO, Ba(CH 3 COO) 2 , and ZnO were heated at temperatures from 700 to 1050°C, quartz phases formed. Similarly, heating a mixture of powdered silica glass and Li 2 CO 3  yielded quartz. In all cases the formation of quartz phases always accompanied the formation of silicate minerals. When a mixture of silica gel and 1 wt% Li 2 CO 3  was heated at 900°C, quartz phases and a very small amount of Li 2 Si 2 O 5  (hereafter denoted as Q-S mixture) were formed. Silica gel mixed with 10 wt% of Q-S mixture was transformed almost completely into quartz phases at 1000°C. The Q-S mixture consisted of only quartz phases after washing with hot H 2 SO 4 . Silica gel mixed with 10 wt% of the washed Q-S mixture was not transformed into quartz, but rather into cristobalite above 1200°C. This fact also indicates that the formation of the silicate mineral is a necessary precursor to the conversion of silica gel and silica glass into quartz."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1892272492426852480","@type":"Researcher","foaf:name":[{"@value":"Hayato Nanri"}]},{"@id":"https://cir.nii.ac.jp/crid/1892272492426852483","@type":"Researcher","foaf:name":[{"@value":"Nobuyuki Takeuchi"}]},{"@id":"https://cir.nii.ac.jp/crid/1892272492426852482","@type":"Researcher","foaf:name":[{"@value":"Shingo Ishida"}]},{"@id":"https://cir.nii.ac.jp/crid/1892272492426852481","@type":"Researcher","foaf:name":[{"@value":"S. Yamane"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00223093"}],"prism:publicationName":[{"@value":"Journal of Non-Crystalline Solids"}],"dc:publisher":[{"@value":"Elsevier BV"}],"prism:publicationDate":"1996-08-01","prism:volume":"203","prism:startingPage":"369","prism:endingPage":"374"},"dataSourceIdentifier":[{"@type":"OPENAIRE","@value":"doi_dedup___::ce63b3c9907bfb9dc67639ec1840b4ff"}]}