MANUFACTURING METHOD OF ORIENTED CERAMIC SINTERED BODY AND FLAT SHEET

• Main Authors: YOSHIKAWA JUN, NANATAKI TSUTOMU, MATSUSHIMA KIYOSHI, SATO KEI, MAEDA TAKAHIRO, WATANABE MORIMICHI
• Format: Patent
• Language: English; Japanese
• Published: 30.05.2019
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; METALLURGY; PERFORMING OPERATIONS; REFRACTORIES; SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURESCONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER; SLAG; TRANSPORTING; TREATMENT OF NATURAL STONE; WORKING CEMENT, CLAY, OR STONE

To suppress deviation of a crystal orientation of a surface of an oriented ceramic sintered body from an inside crystal orientation.SOLUTION: A manufacturing method of an oriented ceramic sintered body includes (a) a process for manufacturing a ceramic molded body before firing to the oriented ceramic sintered body, and (b) a process for arranging the ceramic molded body in a hot press firing furnace with sandwiching the same with a pair of release sheets and hot press firing the ceramic molded body while pressing the same with a pair of punches via the pair of release sheets to obtain the oriented ceramic sintered body. The release sheets have maximum cross section height Pt of a cross section curve in a surface in an opposite side to a stainless steel sheet side after the release sheets are sandwiched with PET films having thickness of 75 μm and arithmetic average roughness Ra of a surface of 0.03 μm, then mounted on a stainless steel sheet having thickness of 10 mm and arithmetic average roughness Ra of a surface of 0.29 μm and packed under vacuum, and isostatic press is conducted at 200 kg/cmof 0.8 μm or less.SELECTED DRAWING: None 【課題】配向セラミック焼結体の表面の結晶方位が内部の結晶方位とずれるのを抑制する。【解決手段】本発明の配向セラミック焼結体の製法は、（ａ）配向セラミック焼結体に焼成する前のセラミック成形体を作製する工程と、（ｂ）セラミック成形体を一対の離型シートで挟んでホットプレス焼成炉内に配置し、一対の離型シートを介してセラミック成形体を一対のパンチで加圧しながらホットプレス焼成して配向セラミック焼結体を得る工程と、を含む。離型シートは、厚み７５μｍで表面の算術平均粗さＲａが０．０３μｍのＰＥＴフィルムで挟んだ後、厚み１０ｍｍで表面の算術平均粗さＲａが０．２９μｍのステンレス鋼板に載せて真空パックし、２００ｋｇ／ｃｍ2で静水圧プレスを行った後のステンレス鋼板側とは反対側の面の断面曲線の最大断面高さＰｔが、０．８μｍ以下のものである。【選択図】なし