Concepedia

Keiko Koga

KK

36

Publications

1.6K

Citations

20

H-Index

1973

Active since

Affiliations

Otsuka (Japan)(Current)

Kyushu Sangyo University

Kyushu University

Tokushima University

Yamagata University

Keiko Koga is an author at Otsuka (Japan) specializing in engineering, materials science, and polymer chemistry.

Top concepts

EngineeringMaterial SciencePolymer SciencePolymer ChemistryMedicineChemistryApplied PhysicsPhysiologyPharmacologyFunctional Materials

Publications per year

1973–2024

36

Publications

36

Piezoelectricity and related properties of vinylidene fluoride and trifluoroethylene copolymers

Keiko Koga, Hiroji Ohigashi · Journal of Applied Physics · 1986 · 378 citations

Materials Science, Vinylidene Fluoride, Piezoelectric Constant D31 +15

Temperature dependence of elastic, dielectric, and piezoelectric properties of “single crystalline’’ films of vinylidene fluoride trifluoroethylene copolymer

Kenji Omote, Hiroji Ohigashi, Keiko Koga · Journal of Applied Physics · 1997 · 239 citations

Piezoelectric Resonance Method, Engineering, Temperature Dependence +17

Ferroelectric Copolymers of Vinylidenefluoride and Trifluoroethylene with a Large Electromechanical Coupling Factor

Hiroji Ohigashi, Keiko Koga · Japanese Journal of Applied Physics · 1982 · 145 citations

Engineering, Chemistry, Polar Axis +17

Crystallization, field-induced phase transformation, thermally induced phase transition, and piezoelectric activity in P(vinylidene fluoride-TrFE) copolymers with high molar content of vinylidene fluoride

Keiko Koga, Nobuko Nakano, Takeshi Hattori et al. · Journal of Applied Physics · 1990 · 114 citations

Engineering, Piezoelectric Properties, Chemistry +17

Lamellar and Bulk Single Crystals Grown in Annealed Films of Vinylidene Fluoride and Trifluoroethylene Copolymers

Hiroji Ohigashi, Shuyo Akama, Keiko Koga · Japanese Journal of Applied Physics · 1988 · 68 citations

Engineering, Lamellar Crystals, Chemistry +18

Rows per page

1–5 of 36