Patent application number | Description | Published |
20090121589 | (Li, Na, K)(Nb, Ta)O3 BASED PIEZOELECTRIC MATERIAL AND MANUFACTURING METHOD THEREOF - Manufacturing sintered bodies having microstructures including microscopic grains having a grain diameter of less than 5 μm, intermediate grains having a grain diameter of 5 μm or more and less than 15 μm, and coarse grains having a grain diameter of 15 μm or more and 100 μm or less enables to obtain high electric characteristics. Chemical compounds including metal elements are mixed so that the ratio of the elements is a composition expressed by (Li, Na, K)(Nb, Ta)O | 05-14-2009 |
20090212254 | (Li, Na, K)(Nb, Ta, Sb)O3 BASED PIEZOELECTRIC MATERIAL AND MANUFACTURING METHOD THEREOF - The present inventive (Li, Na, K) (Nb, Ta, Sb) O | 08-27-2009 |
20100019187 | PIEZOELECTRIC/ELECTROSTRICTIVE CERAMICS SINTERED BODY AND PIEZOELECTRIC/ELECTROSTRICTIVE DEVICE USING THE SAME - There is disclosed a piezoelectric/electrostrictive ceramics which is a sintered body having a structure where a matrix and a filler are brought into a composite, the matrix is made of an alkali niobate-based piezoelectric/electrostrictive material, which includes a large number of grains combined with one another, including a perovskite type oxide, which includes at least one element selected from the group consisting of Li, Na and K as an A site constituent element and Nb as a B site constituent element, as a main crystal phase, the filler is made of a material (with the proviso that an alkali niobate-based material is excluded) having a thermal expansion coefficient smaller than that of the alkali niobate-based piezoelectric/electrostrictive material, and the volume fraction of the filler with respect to the total volume of the matrix and the filler is 0.5 vol % or more and below 10 vol %. | 01-28-2010 |
20100021728 | (Li, Na, K, Bi)(Nb, Ta)O3 BASED PIEZOELECTRIC MATERIAL AND MANUFACTURING METHOD OF THE SAME - Disclosed are piezoelectric materials in which electrical properties are improved, and manufacturing methods of the same. In (Li, Na, K, Bi)(Nb, Ta)O | 01-28-2010 |
20100330429 | POSITIVE ELECTRODE ACTIVE MATERIAL AND LITHIUM SECONDARY BATTERY - A positive electrode active material having an average from 1 μm or lager to smaller than 5 μm and containing a large number of crystal grains being composed of lithium manganate of spinel structure containing lithium and manganese as constituent elements, whose crystallite size is 500 to 1,500 nm in powder X-ray diffraction pattern, and whose value of a lattice strain (η) of 0.05×10 | 12-30-2010 |
20110003205 | POSITIVE ELECTRODE ACTIVE ELEMENT AND LITHIUM SECONDARY BATTERY USING THE SAME - A positive electrode active material comprising a large number of crystal grains composed of lithium manganate of spinel structure, wherein the large number of crystal grains contain primary particles of 3 to 20 μm in particle diameter by 70 areal % or more relative to all the crystal grains, the primary particles contain a component having a rectangular plane, and the ratio of the total area of all the rectangular planes to the total surface area of the primary particles is 0.5 to 5%. | 01-06-2011 |
20110003206 | POSITIVE ELECTRODE ACTIVE ELEMENT AND LITHIUM SECONDARY BATTERY - A positive electrode active material having a specific surface area of 0.1 to 0.5 m | 01-06-2011 |
20110210281 | PIEZOELECTRIC/ELECTROSTRICTIVE CERAMICS SINTERED BODY - A piezoelectric/electrostrictive ceramic sintered body has a microstructure in which a matrix phase and an additional material phase having different compositions coexist and the additional material phase is dispersed in the matrix phase. A residual strain ratio of the additional material phase alone is larger than a residual strain ratio of the matrix phase alone. The matrix phase and the additional material phase have a composition in which a Mn compound containing Mn atoms of 0 parts by mole or more and 3 parts by mole or less and a Ba compound containing Ba atoms of 0 parts by mole or more and 1 part by mole or less are contained in a composite of 100 parts by mole represented by a general formula {Li | 09-01-2011 |
20110311435 | METHOD FOR PRODUCING SPINEL-TYPE LITHIUM MANGANATE - The production method of the present invention includes (A) a raw material preparation step of preparing a raw material mixture containing at least a manganese compound; (B) a forming step of forming the raw material mixture prepared through the raw material preparation step into a compact having a longitudinal size L and a maximum size R as measured in a direction perpendicular to the longitudinal direction (i.e., in a thickness direction) such that L/R is 3 or more; (C) a firing step of firing the compact obtained through the forming step; and (D) a crushing step of crushing the fired compact obtained through the firing step. | 12-22-2011 |
20110311436 | METHOD FOR PRODUCING SPINEL-TYPE LITHIUM MANGANATE - The production method of the present invention includes a raw material preparation step of preparing a raw material mixture; a firing step of firing the raw material mixture prepared through the raw material preparation step; and a crushing step of crushing the fired compact obtained through the firing step, wherein the raw material mixture contains a main raw material containing at least a manganese compound, and a seed crystal having a spinel-type crystal structure. | 12-22-2011 |
20110311437 | METHOD FOR PRODUCING SPINEL-TYPE LITHIUM MANGANATE - The production method of the present invention includes (A) a forming step of forming into a sheet-like compact a raw material containing at least a manganese compound and not containing a lithium compound; (B) a first firing step of firing the sheet-like compact formed through the forming step; and (C) a second firing step of firing a mixture of the fired compact obtained through the first firing step and a lithium compound at a temperature lower than the firing temperature employed in the first firing step. | 12-22-2011 |