Fabrication of c-axis oriented polycrystalline ZnO by using a rotating magnetic field and following sintering

Tanaka, Satoshi; Makiya, Atsushi; Kato, Zenji; Uchida, Nozomu; Kimura, Tsunehisa; Uematsu, Keizo

doi:10.1557/jmr.2006.0098

Cited by 61 publications

(33 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Applying a rotating magnetic field (RMF) in the horizontal plane of the particles gathers the magnetic susceptibility of all the particles along a single direction. 35),36) The merits of this method are that special template particles are unnecessary, and thus densification can be achieved easily. To date, we have fabricated crystal-oriented ceramic BNBT (x = 0.15) (hereafter, BNBT15) materials and improved the piezoelectric properties.…”

Section: Introductionmentioning

confidence: 99%

Influence of tetragonality on crystal orientation induced by a strong magnetic field and on the piezoelectric properties of the (Bi0.5, Na0.5)1−xBaxTiO3 ceramic system

Tanaka

Sano

Harada

et al. 2018

J. Ceram. Soc. Japan

Self Cite

View full text Add to dashboard Cite

Crystal-oriented (Bi 0.5 , Na 0.5 ) 1¹x Ba x TiO 3 (BNBT), (x = 0.10.25) ceramics with a perovskite crystal structure were prepared by colloidal processing in a strong rotating magnetic field with the aim of improving their piezoelectric properties. The advantages of increasing the amount of Ba in these ceramics are twofold; specifically, this will lead to anisotropic crystal lattices and it will also increases the tetragonality. The crystaloriented BNBT (x = 0.10.25) ceramics were prepared by using a rotating magnetic field to orient the a-and caxes of the crystal in the powder compact. The degree of orientation also increased with the tetragonality. The phase transformation that occurred above Curie temperature during sintering redistributed the c-axis-oriented structure along both the a-and c-axes. Again, the c-axis orientation was enhanced by electrical field polarization. The piezoelectric d 33 constant, which depended on the Ba content, achieved a maximum value of 122 pC N ¹1 at a Ba content of 15 mol %.

show abstract

Section: Introductionmentioning

confidence: 99%

Influence of tetragonality on crystal orientation induced by a strong magnetic field and on the piezoelectric properties of the (Bi0.5, Na0.5)1−xBaxTiO3 ceramic system

Tanaka

Sano

Harada

et al. 2018

J. Ceram. Soc. Japan

Self Cite

View full text Add to dashboard Cite

show abstract

“…There would be probability of further influence on the electrically microstructural control, by texture engineering using templated grain growth or magnetic field, sintering process such as millimeter heating, and synthesis from mechanically treated nano-composite particles. [14][15][16][17] …”

Section: Functional Oxides Research Lettermentioning

confidence: 99%

Non-linearity variation of single junctions and its analysis using nano-prober within fine-grained ZnO-based multilayer varistors

Koga

Higashi

2016

MRS Communications

View full text Add to dashboard Cite

Direct electrical measurement of single grain boundaries is performed for ZnO-based multilayer ceramic varistors with fine grains of 2 µm, using a nano-prober. The effect of ZnO grains on non-linearity is shown to be significant. The microstructure is comprised at least two non-linear types as good-and bad-junctions. The numerical ratio of good to bad is estimated to be about one (non-linearity exponent α max ≥ 10) to two (<10), which is independent of microstructural development as grain growth. The grain control of twinning as well as crystal orientation and donor concentration is considered effective in the further improvement.

show abstract

“…11)13) It can orient the axis of the highest diamagnetic susceptibility to one direction at least in principle as follows. 13)17) The diamagnetic susceptibility is different in principle axes in KNa 2 Nb 5 O 15 , and is » c < » a < 0. Placed in a high magnetic field, the c-axis should be oriented perpendicular to the magnetic field and the a-axis aligned parallel to the magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of c-axis-oriented potassium strontium niobate (KSr2Nb5O15) ceramics by a rotating magnetic field and electrical property

Tanaka

Takahashi

Furushima

et al. 2010

J. Ceram. Soc. Japan

Self Cite

View full text Add to dashboard Cite

Fabrication and property of c-axis-oriented KSr 2 Nb 5 O 15 (KSN) ceramics were examined. Particle-oriented KSN was fabricated by using a rotating magnetic field and subsequent sintering. KSN fine powder was prepared by conventional solid-state reaction and grinding processing. C-axis-oriented KSN green compact was fabricated in a rotating magnetic field 10 Tesla. The resulting green body was sintered at 1473 K for 6 h and then at 1525 K for 2 h to prevent exaggerated grain growth. C-axis-oriented KSN ceramics with relative density 92% was obtained. In XRD, peaks from the c-planes, such as 001 and 002, were very strong at the horizontal cross section of the sintered specimens. The ferroelectric and piezoelectric property along to c-axis was also improved to 21 µC/cm 2 and d 33 = 101 pC/N by orientation structure.

show abstract

Fabrication of c-axis oriented polycrystalline ZnO by using a rotating magnetic field and following sintering

Cited by 61 publications

References 24 publications

Influence of tetragonality on crystal orientation induced by a strong magnetic field and on the piezoelectric properties of the (Bi<sub>0.5</sub>, Na<sub>0.5</sub>)<sub>1−</sub><i><sub>x</sub></i>Ba<i><sub>x</sub></i>TiO<sub>3</sub> ceramic system

Influence of tetragonality on crystal orientation induced by a strong magnetic field and on the piezoelectric properties of the (Bi<sub>0.5</sub>, Na<sub>0.5</sub>)<sub>1−</sub><i><sub>x</sub></i>Ba<i><sub>x</sub></i>TiO<sub>3</sub> ceramic system

Non-linearity variation of single junctions and its analysis using nano-prober within fine-grained ZnO-based multilayer varistors

Fabrication of c-axis-oriented potassium strontium niobate (KSr2Nb5O15) ceramics by a rotating magnetic field and electrical property

Contact Info

Product

Resources

About