Abstract: Hollow particles containing monocrystalline titanium oxide and silica, and having a titanium oxide content of 86.0-99.5 mol % and a silica content of 0.5-14.0 mol %; and a method of producing the particles. A white ink containing the hollow particles as a coloring agent; the use of the white ink in inkjet recording; and a method for inkjet recording using the white ink.

Abstract: Hollow structure particles which contain titanium oxide and silica, in which the crystal type of the titanium oxide is rutile type; a method for producing the hollow structure particles; a white ink which contains these hollow structure particles as a coloring agent; use of the white ink in inkjet recording; and an inkjet recording method which uses the white ink.

Abstract: Hollow particles containing monocrystalline titanium oxide and silica, and having a titanium oxide content of 86.0-99.5 mol % and a silica content of 0.5-14.0 mol %; and a method of producing the particles. A white ink containing the hollow particles as a coloring agent; the use of the white ink in inkjet recording; and a method for inkjet recording using the white ink.

Abstract: Hollow structure particles which contain titanium oxide and silica, in which the crystal type of the titanium oxide is rutile type; a method for producing the hollow structure particles; a white ink which contains these hollow structure particles as a coloring agent; use of the white ink in inkjet recording; and an inkjet recording method which uses the white ink.

Abstract: There is provided a new infrared-shielding sheet that has been improved to a large extent in terms of transparency in the visible light region, radio-wave transparency, infrared shielding properties, production cost, and hue. The infrared-shielding sheet includes: a laminated film having high-refractive index resin layers containing fine particles and low-refractive index resin layers containing fine particles alternately laminated therein; and an infrared-absorbent pigment layer containing an infrared-absorbent pigment having a visible light transmittance of 70% or greater and a b* value in the L*a*b* color system of 10 or less, wherein for at least one layer of the low-refractive index resin layers, a value obtained by subtracting the refractive index at an arbitrary wavelength in the range of 780 nm to 2,500 nm from the refractive index at a wavelength of 550 nm is 0.

Abstract: A piezoelectric resonator for an ultrasonic transducer includes a piezoelectric vibrating body, a signal electrode, a ground electrode, multiple bottomed groove portions, and a ground common electrode. The piezoelectric vibrating body is constituted of a piezoelectric ceramics. Multiple bottomed groove portions are formed to expose the principal surface of the piezoelectric vibrating body in a slice direction along a scanning direction of the piezoelectric resonator on the signal electrode. The ground common electrode is formed on at least one end portion of an end surface of the piezoelectric vibrating body in the slice direction and adjacent to both end portions in the scanning direction. The groove portions separate the signal electrode into a plurality of the signal electrodes in the scanning direction, and the ground common electrode electrically connects electrodes at both ends out of the signal electrodes which are separated to the ground electrode.