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METHOD FOR OBSERVING INNER STRUCTURE OF CERAMIC, METHOD FOR PRODUCING CERAMIC, ANALYSIS SYSTEM, AND SYSTEM FOR PRODUCING CERAMIC NEW

外国特許コード F180009550
整理番号 (S2017-0254-N0)
掲載日 2018年11月2日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2018JP007541
国際公開番号 WO 2018159689
国際出願日 平成30年2月28日(2018.2.28)
国際公開日 平成30年9月7日(2018.9.7)
優先権データ
  • 特願2017-037446 (2017.2.28) JP
発明の名称 (英語) METHOD FOR OBSERVING INNER STRUCTURE OF CERAMIC, METHOD FOR PRODUCING CERAMIC, ANALYSIS SYSTEM, AND SYSTEM FOR PRODUCING CERAMIC NEW
発明の概要(英語) This method for observing the inner structure of ceramic using optical coherence tomography includes: a step for dividing light in the infrared region into a reference light and an irradiation light; a step for irradiating the ceramic with the irradiation light; and a step for observing the inner structure of the ceramic by observing the coherency between the reflected reference light and returning light obtained by irradiating the ceramic with the irradiation light.
従来技術、競合技術の概要(英語) BACKGROUND ART
The internal structure of the ceramics, the slurry from the raw material powder, the molded body, the sintered body to a large change in the known processes are.In the prior art, observation of the internal structure of a ceramic, a method of using an optical microscope (for example, see Non-Patent Document 1), a method of using X-ray CT (for example, see Non-Patent Document 2) and the like have been used.
The properties of ceramics, being dominated by the ceramic structure has been known.Therefore, the end product from a raw material of the ceramics to accurately grasp the structure in the step of forming the ceramics process chain and, if it is possible to control its structure, excellent function and high reliability can be manufactured with a ceramic.In addition, such a structure taking advantage of the observation method of the step of forming, slurry constantly changing during the manufacturing processes, the molded body, the structure of the sintered body can be evaluated in real time, without resorting to visual or trick the tradesman, relatively uniform at the step previous to the formation of the structure and the factor is detected, and it can be removed.
Further, the total inspection of the internal structure of the final product, high-speed, high resolution and a wide range can be carried out at a low cost, improved reliability of the product and reduction of cost required for inspection can be achieved.In this way, in the production of ceramics and a three-dimensional structure is formed dynamically in the course of the processes was observed with the, scientific understanding, or improvement of the yield of the ceramic in order to improve the reliability of the very important.
On the other hand, in each unit operation in the production of ceramics processes, there are a number of control factors.For example, in the ceramic fine particles, the kind and mixing amount of the dispersant to the control factors.Of the ceramic particles dispersed in the dispersion medium, the dispersant adsorbed to the ceramic particles, ceramic particles and the wettability of the dispersion medium is a complex phenomenon is involved.Therefore, for the control factor for the preparation of the slurry, the intuition and experience an apparent that the optimization was performed.
In addition, each of the ceramic particles, the affinity with the solvent or dispersion agent such as adsorption behavior, particles and the liquid phase of the phenomena that the interface should be different.Therefore, considering subsequent molding processes, the viscosity of the slurry, the solids content in the slurry, organic compounds contained in the slurry (binder, plasticizer, lubricant and the like) and the like into consideration, it is necessary to optimize the plurality of control factors.
In addition, a sheet-like molded is at the time of drying, the ceramic particles dispersed in a liquid in the structure, the contact between the solid structure should change dynamically.This change is similar to the aggregation.If, at the same time drying of the molded body, molding and accurately grasp the change in the internal structure, the control structure is formed if the solved scientific factors, no breakage or deformation in order to obtain uniform molding drying temperature, time and the atmosphere, can be determined analytically from the considered.Further, a large amount of energy consumption, of the molded body in the sintering processes, such as the temperature profile is largely set by the tradesman trick.If, in the scientific factors control the sintering so as to determine the processes and can be optimized accurately, it is possible to reduce energy consumption, and thus, cost reduction can be achieved.
In this way, in the production of ceramics to understand the structure of the step of forming processes, control can be achieved in the resolved and the chemical factor, production of ceramics can be organization techniques and.Then, through the optimization of the entire ceramics process chain, is an obstacle to the widespread use of the ceramic variety of techniques can be solved the problem.As a result, improvement of yield in the manufacture of a ceramic, low cost, and, like the high reliability can be realized.
  • 出願人(英語)
  • ※2012年7月以前掲載分については米国以外のすべての指定国
  • KANAGAWA INSTITUTE OF INDUSTRIAL SCIENCE AND TECHNOLOGY
  • NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITY
  • 発明者(英語)
  • Takumi Takahashi
  • Junichi Masumi
国際特許分類(IPC)
指定国 National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JO JP KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG
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