Abstract: Provided are a toner and a two-component developer each of which: shows a small fluctuation in charge quantity and a small fluctuation in image density even under a high-temperature and high-humidity environment; and does not cause any member contamination even after endurance and hence can stably output an image. The toner and the two-component developer each have a feature in that positively chargeable strontium titanate fine particles are added to toner particles having fixed thereto negatively chargeable silica fine particles.

Abstract: The present invention provides a toner that excels in low-temperature fixability and also maintains charging performance, storability, and anti-hot offset property even in long-term image output. The toner comprising a toner particle containing an amorphous polyester resin, a crystalline polyester resin, wax, and a colorant, wherein a weight-average molecular weight (Mw) of the crystalline polyester resin is 5000 to 14,000, and the crystalline polyester resin includes 0.5 mass % to 15.0 mass % of a segment derived from one or more aliphatic compounds selected from the group consisting of aliphatic monocarboxylic acids with a carbon number of 8 to 20 and aliphatic monohydric alcohols with a carbon number of 8 to 20.

Abstract: Provided are a toner and a two-component developer each of which: shows a small fluctuation in charge quantity and a small fluctuation in image density even under a high-temperature and high-humidity environment; and does not cause any member contamination even after endurance and hence can stably output an image. The toner and the two-component developer each have a feature in that positively chargeable strontium titanate fine particles are added to toner particles having fixed thereto negatively chargeable silica fine particles.

Abstract: Provided is a toner obtained by melting and kneading a binder resin containing a polyester resin A and a polyester resin B, a colorant, and a wax, in which in the resin A, the content of a polyhydric alcohol unit derived from an aromatic diol, the content of a polyhydric alcohol unit derived from an oxyalkylene ether of a novolac type phenol resin, and the content of a polyvalent carboxylic acid unit derived from an aliphatic dicarboxylic acid, which contains a straight-chain hydrocarbon having 4 or more to 16 or less carbon atoms as a main chain and has carboxyl groups at both of its terminals, fall within specific ranges, and in the resin B, the content of a polyhydric alcohol unit derived from an aromatic diol and the content of a polyvalent carboxylic acid unit derived from an aromatic dicarboxylic acid or a derivative thereof fall within specific ranges.

Abstract: Provided is a toner that has excellent low-temperature fixability, hot offset resistance, high image glossiness and fixing wraparound resistance, as well as high durable stability. The toner includes toner particles that contain a binder resin, a colorant and a wax, and fine inorganic particles on a surface of the toner particles, wherein the binder resin contains a polyester resin A and a styrene resin B, and a content ratio A/B of the polyester resin A and the styrene resin B is 85/15 or more and 98/2 or less based on mass, the styrene resin B has a weight average molecular weight Mw of a tetrahydrofuran soluble component of 2,000 or more and 5,000 or less, and the toner has been subjected to a hot-air surface treatment.

Abstract: A developer supply cartridge includes a developer supply container. The developer supply container includes a developer accommodation section, a developer in the developer accommodation section, a discharging port configured to discharge the developer toward a developer supply apparatus, a pump unit configured to perform an exhaust operation through the discharging port, a developer storage section configured to store a certain amount of developer before discharge, the developer storage section communicating with the developer accommodation section and being in contact with the discharging port, and a suppression part configured to control inflow and suppression of inflow of the developer from the developer accommodation section to the developer storage section and suppress the inflow of the developer during the exhaust operation of the pump unit. The developer has a compressibility Ct of 30.0% or more and 45.0% or less.

Abstract: A positive electrode material is used for a lithium secondary battery. The material includes a complex oxide whose overall composition is expressed by LiaNibMcNdLeOx, where M: one or two chemical elements selected from Mn and Co, N: one, two, or more chemical elements selected from the group consisting of Mg, Al, Ti, Cr, and Fe, L: one, two, or more chemical elements selected from the group consisting of B, C, Na, Si, P, S, K, Ca, and Ba, and where a/(b+c+d): 0.80 to 1.30, b/(b+c+d): 0.30 to 0.95, c/(b+c+d): 0.05 to 0.60, d/(b+c+d): 0.005 to 0.10, e/(b+c+d): 0.0005 to 0.010, b+c+d=1, and x: 1.5 to 2.5.

Abstract: Provided is a developer replenishing cartridge excellent in accuracy with which an image forming apparatus is replenished with a developer irrespective of a use environment even when the developer is in a consolidated state. The developer replenishing cartridge includes: a developer replenishing container and a developer, being removably mountable to a developer replenishing apparatus; in which: the developer replenishing container includes a pump portion that operates so that a state where the internal pressure of a developer containing portion is lower than the atmospheric pressure and a state where the pressure is higher than the atmospheric pressure alternately repeatedly switch with each other; and the developer contains toner having a uniaxial collapse stress at a maximum consolidation stress of 10.0 kPa, of 2.5 kPa or more and 3.5 kPa or less.

Abstract: Provided is a developer replenishing cartridge excellent in accuracy with which an image forming apparatus is replenished with a developer irrespective of a use environment even when the developer is in a consolidated state. The developer replenishing cartridge includes: a developer replenishing container and a developer, being removably mountable to a developer replenishing apparatus; in which: the developer replenishing container includes a pump portion that operates so that a state where the internal pressure of a developer containing portion is lower than the atmospheric pressure and a state where the pressure is higher than the atmospheric pressure alternately repeatedly switch with each other; and the developer contains toner having a uniaxial collapse stress at a maximum consolidation stress of 10.0 kPa, of 2.5 kPa or more and 3.5 kPa or less.

Abstract: Provided is a toner obtained by melting and kneading a binder resin containing a polyester resin A and a polyester resin B, a colorant, and a wax, in which in the resin A, the content of a polyhydric alcohol unit derived from an aromatic diol, the content of a polyhydric alcohol unit derived from an oxyalkylene ether of a novolac type phenol resin, and the content of a polyvalent carboxylic acid unit derived from an aliphatic dicarboxylic acid, which contains a straight-chain hydrocarbon having 4 or more to 16 or less carbon atoms as a main chain and has carboxyl groups at both of its terminals, fall within specific ranges, and in the resin B, the content of a polyhydric alcohol unit derived from an aromatic diol and the content of a polyvalent carboxylic acid unit derived from an aromatic dicarboxylic acid or a derivative thereof fall within specific ranges.

Abstract: Provided are a toner and a two-component developer each of which: shows a small fluctuation in charge quantity and a small fluctuation in image density even under a high-temperature and high-humidity environment; and does not cause any member contamination even after endurance and hence can stably output an image. The toner and the two-component developer each have a feature in that positively chargeable strontium titanate fine particles are added to toner particles having fixed thereto negatively chargeable silica fine particles.

Abstract: Provided is a toner that allows a transferred image to be stably output regardless of smoothness of a transfer material even under high-temperature and high-humidity environment or under low-temperature and low-humidity environment, that is excellent in cleanability for a transfer member even at the time of high-speed printing, and that causes less member contamination. The toner is a toner including toner particles each containing a binder resin and a wax, and silica fine particles on surfaces of the toner particles, wherein the silica fine particles have a number-average particle diameter of primary particles of 60 nm or more and 300 nm or less, a coverage rate of the surfaces of the toner particles with the silica fine particles is 15% or more and 95% or less, and the toner has a uniaxial collapse stress at a maximum consolidation stress of 10.0 kPa, of 2.5 kPa or more and 3.5 kPa or less.

Abstract: A toner having toner particles, each of which contains a binder resin and a colorant, wherein in viscoelastic properties of the toner as measured with a rotating flat plate rheometer at a frequency of 6.28 rad/sec: a storage elastic modulus at the temperature of 60° C. (G?60) is in a range from 1.0×107 to 1.0×109 (Pa), and a maximal value (G?p) exists for the storage elastic modulus in a temperature range from 110° C. to 140° C., with this G?p being in a range from 5.0×104 to 5.0×106 (Pa).

Abstract: Provided is a toner that has excellent low-temperature fixability, hot offset resistance, high image glossiness and fixing wraparound resistance, as well as high durable stability. The toner includes toner particles that contain a binder resin, a colorant and a wax, and fine inorganic particles on a surface of the toner particles, wherein the binder resin contains a polyester resin A and a styrene resin B, and a content ratio A/B of the polyester resin A and the styrene resin B is 85/15 or more and 98/2 or less based on mass, the styrene resin B has a weight average molecular weight Mw of a tetrahydrofuran soluble component of 2,000 or more and 5,000 or less, and the toner has been subjected to a hot-air surface treatment.

Abstract: Provided is a method of evaluating properties of ferrite which can continuously measure change in magnetic properties accompanying change in composition of the ferrite merely by preparing one specimen. A composition gradient ferrite thin film constituted of a plurality of composition gradient ferrite layers which are formed by inclining component composition in the horizontal direction is formed on a single crystal substrate having light transmitting property using a thin film forming method, and a magneto-optical effect is continuously measured along the composition gradient direction of the ferrite thin film whereby change in magnetic properties accompanying a change in composition of the ferrite is continuously measured also provided is a method of evaluating properties of ferrite which can continuously measure change in magnetic properties accompanying change in composition of the ferrite merely by preparing one specimen.

Abstract: Provided is a method of evaluating properties of ferrite which can continuously measure change in magnetic properties accompanying change in composition of the ferrite merely by preparing one specimen. A composition gradient ferrite thin film constituted of a plurality of composition gradient ferrite layers which are formed by inclining component composition in the horizontal direction is formed on a single crystal substrate having light transmitting property using a thin film forming method, and a magneto-optical effect is continuously measured along the composition gradient direction of the ferrite thin film whereby change in magnetic properties accompanying a change in composition of the ferrite is continuously measured.

Abstract: An inexpensive piezoelectric single-crystal device being excellent in the piezoelectric characteristics and having a complex perovskite structure can be provided by adding a specific additive to a lead magnesium niobate-lead titanate (PMN-PT) single crystal or a lead zinc niobate-lead titanate (PZN-PT or PZNT) single crystal. Specifically, the piezoelectric single crystal has a complex perovskite structure and is formed of a composition containing 35 to 98 mol % lead magnesium niobate [Pb(Mg1/3Nb2/3)O3] or lead zinc niobate [Pb(Zn1/3Nb2/3)O3], 0.1 to 64.9 mol % lead titanate [PbTiO3], and 0.05 to 30 mol % lead indium niobate [Pb(In1/2Nb1/2)O3] wherein calcium is substituted for 0.05 to 10 mol % lead in the composition.

Abstract: A piezoelectric single crystal device is provided exhibiting excellent piezoelectric properties, within a specific high-temperature range of Trrt° C. to (Trt?20)° C., where Trt represents a transformation temperature between a pseudocubic system and a tetragonal system. Specifically, the piezoelectric single crystal device is composed of a single crystal having a composition represented by [Pb(Mg,Nb)O3](1-X)·[PbTiO3](X), where X is within the range of 0.26 to 0.29 and having a complex perovskite structure, wherein a specific inductive capacity at 25° C. is 5,000 or more, and a specific inductive capacity at the transformation temperature between a pseudocubic system and a tetragonal system of the above-described single crystal is 2.5 times or more larger than the specific inductive capacity at 25° C.

Abstract: An inexpensive piezoelectric single-crystal device being excellent in the piezoelectric characteristics and having a complex perovskite structure can be provided by adding a specific additive to a lead magnesium niobate-lead titanate (PMN-PT) single crystal or a lead zinc niobate-lead titanate (PZN-PT or PZNT) single crystal. Specifically, the piezoelectric single crystal has a complex perovskite structure and is formed of a composition containing 35 to 98 mol % lead magnesium niobate [Pb(Mg1/3Nb2/3)O3] or lead zinc niobate [Pb(Zn1/3Nb2/3)O3], 0.1 to 64.9 mol % lead titanate [PbTiO3], and 0.05 to 30 mol % lead indium niobate [Pb(In1/2Nb1/2)O3] wherein calcium is substituted for 0.05 to 10 mol % lead in the composition.

Abstract: A piezoelectric single crystal device is provided exhibiting excellent piezoelectric properties, within a specific high-temperature range of Trrt° C. to (Trt?20)° C., where Trt represents a transformation temperature between a pseudocubic system and a tetragonal system. Specifically, the piezoelectric single crystal device is composed of a single crystal having a composition represented by [Pb(Mg,Nb)O3](1?X)·[PbTiO3](X), where X is within the range of 0.26 to 0.29 and having a complex perovskite structure, wherein a specific inductive capacity at 25° C. is 5,000 or more, and a specific inductive capacity at the transformation temperature between a pseudocubic system and a tetragonal system of the above-described single crystal is 2.5 times or more larger than the specific inductive capacity at 25° C.