Untitled

Miura, Seiko; Miwa, Zenzo; Iijima, Hideyo; Takagi, Yasuaki

doi:10.7144/sgf.9.216

Cited by 3 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The samples with x = 0, 0.25, 0.50 and 0.75 exhibited XRD patterns assignable to cubic crystalline structures, and their lattice constants were evaluated from the angles of 110, 200 and 211 diffraction peaks in cubic structure by using a unit cell parameter refinement program of CellCalc. 10) In the sample with x = 1 (CaZrO 3 ), which showed the XRD pattern of orthorhombic crystalline structure, the lattice constant was estimated as the cube root of the lattice volume evaluated by using CellCalc from the angles of 101, 200, 121, 002 and 202 diffraction peaks in orthorhombic structure. The lattice constants a showed continuous and rather linear relation to x.…”

Section: Methodsmentioning

confidence: 99%

Formation of solid solutions in wide miscibility-gap perovskite-type oxide system of Ba1−xCaxZrO3 over the entire Ca composition range

Ako

Fujisawa

Hanaya

2020

J. Ceram. Soc. Japan

View full text Add to dashboard Cite

Formation of solid solutions was examined in a wide miscibility gap system of Ba 1¹x Ca x ZrO 3 by preparing film samples having amorphous structures with the help of rf magnetron sputtering and then annealing the amorphous film samples at a moderate temperature condition. Ba 1¹x Ca x ZrO 3 solid solutions were successfully formed as monophasic products over the entire Ca composition range, indicating the usefulness of the method for the formation of solid solutions in perovskite-type oxides, and Ca composition dependence of the permittivity was revealed in the solid-solution system.

show abstract

Section: Methodsmentioning

confidence: 99%

Formation of solid solutions in wide miscibility-gap perovskite-type oxide system of Ba1−xCaxZrO3 over the entire Ca composition range

Ako

Fujisawa

Hanaya

2020

J. Ceram. Soc. Japan

View full text Add to dashboard Cite

show abstract

“…The theoretical density was estimated from formula weight and lattice volume calculated with XRD data. 24) The relative density (RD) was calculated by the ratio of bulk and theoretical densities.…”

Section: Methodsmentioning

confidence: 99%

Thermogravimetric and desorbed-gas analyses of perovskite-type Ba(ZnxNb1−x)Oy(OH)z

Saito

Arai

Uekusa

et al. 2019

J. Ceram. Soc. Japan

View full text Add to dashboard Cite

Polycrystalline samples of perovskite-type Ba(Zn x Nb 1¹x)O 3¹¤ with 0¯¤¯0.5 [¤ = (3x ¹ 1)/2; 1/3¯x¯2/3] were characterized by means of thermogravimetry (TG) combined with gas chromatography (GC). The TG-GC experiments on the Ba(Zn x Nb 1¹x)O 3¹¤ samples revealed that these oxides are subject to water incorporation under humid atmospheres, and exhibit multiple steps of water desorption upon heating up to 873 K. The largely different desorption temperatures among these steps indicate a variety of water species being incorporated in different forms, such as physically/chemically adsorbed water molecules and hydroxide ions. For each sample, the number of hydroxide ions and thereby a nominal composition in an oxy-hydroxide form were quantitatively estimated. The total amount of the incorporated water species tends to increase as the oxygen deficiencies (¤) increase. The highly oxygen-deficient samples with ¤ = 0.4 and 0.5 were found to show significantly enhanced electrical conductivity at temperatures between 623 and 773 K in a humid atmosphere. The enhancement may be attributed to the additional contribution of proton conduction associated with the incorporated hydroxide ions.

show abstract

“…The lattice constants of ZnClAp were also calculated from the results of PXRD analysis using CellCalc software ver. 2.20 developed by Miura 26 .…”

Section: Mechanochemical Synthesismentioning

confidence: 99%

Mechanochemical Synthesis of Zinc Chloroapatite and Evaluation of Its Crystallinity by Attenuated Total Reflection - Infrared Spectroscopy and Principal Component Analysis

Itô

Otsuka

Takeuchi

et al. 2019

Phosphorus Research Bulletin

View full text Add to dashboard Cite

Zinc chloroapatite (ZnClAp), a promising material for bone treatment, was synthesized by a mechanochemical method. The effect of synthesis condition on its crystallinity was investigated. Starting materials (i.e., calcium monohydrogen phosphate dihydrate, calcium oxide, zinc oxide and calcium chloride) were kneaded with water at four kinds of water/solid ratios in a planetary ball-mill. Thus obtained products were analyzed by a powder X-ray diffractometry (PXRD) and an attenuated total reflection -infrared (ATR-IR) spectroscopy. The PXRD and ATR-IR results indicate that ZnClAp has successfully been synthesized by the present method. PXRD results indicate that the crystallinity of ZnClAp increases with the water/solid ratio of the kneaded paste for the synthesis. This finding is supported by a principal component analysis (PCA) that is applied to the ATR-IR spectra. The present mechanochemical method is simple, economy, and is useful for the synthesis of ZnClAp.

show abstract

Untitled

Cited by 3 publications

References 0 publications

Formation of solid solutions in wide miscibility-gap perovskite-type oxide system of Ba<sub>1−</sub><i><sub>x</sub></i>Ca<i><sub>x</sub></i>ZrO<sub>3</sub> over the entire Ca composition range

Formation of solid solutions in wide miscibility-gap perovskite-type oxide system of Ba<sub>1−</sub><i><sub>x</sub></i>Ca<i><sub>x</sub></i>ZrO<sub>3</sub> over the entire Ca composition range

Thermogravimetric and desorbed-gas analyses of perovskite-type Ba(Zn<i><sub>x</sub></i>Nb<sub>1−</sub><i><sub>x</sub></i>)O<i><sub>y</sub></i>(OH)<i><sub>z</sub></i>

Mechanochemical Synthesis of Zinc Chloroapatite and Evaluation of Its Crystallinity by Attenuated Total Reflection - Infrared Spectroscopy and Principal Component Analysis

Contact Info

Product

Resources

About