Ngk Spark Plug Company, Limited

Shinji Ban

Hiroshi Watanabe

Takeshi Mitsuoka

Yasuyuki Okimura

Tomoki Yamaguchi

Seiji Oya

Hiroki Takeuchi

Yusuke Katsu

Shohei Takaku

Tsuneyuki Ito

Hiroki Yamauchi

Yuki Shimura

Hiroaki Nakanishi

Tomohiro Nishi

Syohei Takaku

Hiroshi Watanbe

Yasayuki Okimura

Seiya Matsuda

Okimura Yasuyuki

A fluorescent plate including a fluorescent phase which emits fluorescence by excitation light, and a plurality of voids, wherein, in a cross section of the fluorescent plate including cross sections of the voids, voids having an equivalent circle diameter of 0.4 micrometers or greater and 50 micrometers or smaller have a standard deviation in equivalent circle diameter of 1.5 or less.

Fluorescent plate, wavelength conversion member, and light source device

An optical wavelength converter () is configured such that an optical wavelength conversion member () is bonded to a heat dissipation member () having superior heat dissipation property. Thus, heat generated by light incident on the optical wavelength conversion member () can be efficiently dissipated. Therefore, even when high-energy light is incident on the optical wavelength converter, temperature quenching is less likely to occur, and thus high fluorescence intensity can be maintained. An intermediate film () is disposed between a reflective film () and a bonding portion (). The presence of the intermediate film () improves the adhesion between the reflective film () and the bonding portion (), thereby enhancing the heat dissipation from the optical wavelength conversion member () to the heat dissipation member (). Thus, the temperature quenching of the optical wavelength conversion member () can be prevented, thereby enhancing fluorescence intensity.

Optical wavelength converter and composite optical device

In a manufacturing method for a thermistor element () including: a thermistor portion () which is a sintered body formed from a thermistor material; and a pair of electrode wires () which are embedded in the thermistor portion () and at least one end portion of each of the electrode wires projects at an outer side of the thermistor portion (), the resistance value of the thermistor element () is adjusted by performing a removal processing of removing a part of the thermistor portion ().

Thermistor element and manufacturing method therefor

A sintered electroconductive oxide having a perovskite oxide type crystal structure represented by a compositional formula: M1M2MnAlCrOwherein M1 represents at least one element selected from group 3 elements; and M2 represents at least one element selected from among Mg, Ca, Sr and Ba, wherein element M1 predominantly includes at least one element selected from Nd, Pr and Sm, and a, b, c, d, e and f satisfy the following relationships: 0.6005&#x2266;a&#x3c;1.000, 0&#x3c;b&#x2266;0.400, 0&#x2266;c&#x3c;0.150, 0.400&#x2266;d&#x3c;0.950, 0.050&#x3c;e&#x2266;0.600, 0.50&#x3c;e/(c+e)&#x2266;1.00, and 2.80&#x2266;f&#x2266;3.30. Also disclosed is a thermistor element including a thermistor portion which is formed of the sintered electroconductive oxide as well as a temperature sensor employing the thermistor element.

Sintered electrically conductive oxide, thermistor element employing the oxide, and temperature sensor employing the thermistor

A conductive sintered oxide which includes: a conductive crystal phase having a perovskite structure represented by (RESr)MO, in which RE is a group of elements consisting of Yb and/or Lu and at least one element selected from Group IIIA elements excluding Yb, Lu and La, and M is a group of elements consisting of Al and at least one element selected from Groups IVA, VA, VIA, VIIA and VIII, a first insulating crystal phase represented by REO, and a second insulating crystal phase represented by SrAlO. The conductive crystal phase has a coefficient c satisfying 0.18&#x3c;c&#x3c;0.50 and has a coefficient d satisfying 0.67&#x2266;d&#x2266;0.93. A content of a third insulating crystal phase represented by REAlO, the content of which may be zero, is smaller than the content of each of the first and second insulating crystal phases.

Conductive sintered oxide, thermistor element including the same, and temperature sensor including the same

A conductive sintered oxide including: a first crystal phase represented by RE1AlOand a second crystal phase having a perovskite structure represented by (RE2SL)(AlM1)O. RE1 is a first element group consisting of Yb and/or Lu and at least one element selected from Group IIIA elements excluding Yb, Lu and La. RE2 is a second element group consisting of at least one element selected from Group IIIA elements excluding La and including at least one of the elements constituting the first element group RE1. SL is an element group consisting of at least one of Sr, Ca and Mg and which includes Sr as a main element, and M1 is an element group consisting of at least one element selected from Groups IVA, VA, VIA, VIIA and VIII excluding Cr. The coefficient c is in the range of 0.18&#x3c;c&#x3c;0.50, and the coefficients x and y are in the range of 0.95&#x2266;x+y&#x2266;1.1.

A sintered electroconductive oxide forming a thermistor element has a first crystal phase having a composition represented by RE1AlOand a second crystal phase having a perovskite structure represented by (RE2SL)MO. The factor a of the second crystal phase is: 0.18&#x3c;a&#x3c;0.50, wherein RE1 represents at least one of Yb and Lu and at least one species selected from among group 3A elements excluding Yb, Lu, and La; RE2 represents at least one species selected from among group 3A elements excluding La and which contains at least one species selected from the group RE1; M represents Al and at least one species selected from group 4A to 7A, and 8 elements; and SL represents Sr, Ca, and Mg, with at least Sr being included at a predominant proportion by mole.

Growing community of inventors

Gifu, Japan

Shinji Ban