UNSHAPED REFRACTORY AND RADIOACTIVE SHIELD MATERIAL USING IT

• Main Author: ARAI KANJI
• Format: Patent
• Language: English; Japanese
• Published: 11.06.2015
• Subjects: ARTIFICIAL STONE; BLASTING; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; DECONTAMINATION ARRANGEMENTS THEREFOR; DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE; FURNACES; HEATING; KILNS; LIGHTING; LIME, MAGNESIA; MECHANICAL ENGINEERING; METALLURGY; NUCLEAR ENGINEERING; NUCLEAR PHYSICS; OVENS; PHYSICS; PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULARRADIATION OR PARTICLE BOMBARDMENT; REFRACTORIES; RETORTS; SLAG; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; TREATMENT OF NATURAL STONE; WEAPONS

PROBLEM TO BE SOLVED: To provide an unshaped refractory capable of efficiently suppressing crack initiation or the like.SOLUTION: The unshaped refractory of the invention includes: zirconium boride aggregate; almina cement; and a yttrium oxide particle. The yttrium oxide particle suppresses modification of zirconium oxide formed by oxidation of the zirconium boride under a high temperature environment. 【課題】クラック発生などを効果的に抑制可能な不定形耐火物を提供する【解決手段】本発明の不定形耐火物は、ホウ化ジルコニウム質骨材と、アルミナセメントと、酸化イットリウム粒子とを含む。酸化イットリウム粒子は、ホウ化ジルコニウムの酸化により形成された酸化ジルコニウムが高温環境下において変態することを抑制する。【選択図】なし