Reference

Zirconia composition

Zirconia composition. Maki, Takao; Yokoyama, Toshiharu; Setoyama, Toru; Nakajima, Chikahiko; Uchida, Takashi (Mitsubishi Chemical Industries Co., Ltd.In this study， 12688-15-2 and 13826-66-9 are also used., Japan). Jpn. Kokai Tokkyo Koho JP 62021712 A2 30 Jan 1987 Showa, 4 pp. (Japan) CODEN: JKXXAF. CLASS: ICM: C01G025-00. APPLICATION: JP 85-157296 17 Jul 1985. DOCUMENT TYPE: Patent CA Section: 57 (Ceramics) The ZrO2 compn. having sp. surface area 350 m2/g is formed by ZrO2 and 31 of Cr, Mn, or Re as the main components. The ZrO2 compn. is particularly useful in ceramic raw material or catalyst. Thus, Zr oxynitrate (85 wt.% ZrO2) 100 and Cr (NO3)3×9H2O 7.5 g were dissolved in desalted H2O, titrated with 4 N NH4OH to pH 7, and stirred to form ppt. After filtration, washing, and drying, the Cr-contg. ZrO compn. had sp. surface area 105 m2/g vs. 31 for that without Cr content. .

Manufacture of hydroxide fines

Manufacture of hydroxide fines. Kiuchi, Norihiro; Tominaga, Tsutomu (Nippon Mining Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 62030605 A2 9 Feb 1987 Showa, 4 pp. (Japan) CODEN: JKXXAF. CLASS: ICM: C01B013-36. ICS: C01F005-20; C01F011-02; C01F017-00; C01G025-02. APPLICATION: JP 85-169782 2 Aug 1985. DOCUMENT TYPE: Patent CA Section: 49 (Industrial Inorganic Chemicals) Water-sol. salt(s), e.g., Zr, Ca, Mg, and/or Y salts, are mixed with concd.Several reagents such as 13826-66-9 is used here. alkali soln. to form hydroxide fines. During the reaction, the soln. is continuously stirred by a gas jet and/or ultrasonic vibration so as to prevent coagulation. The inorg. hydroxide fines formed by the method are useful in prepn. of ceramic powder. Thus, ZrOCl2 aq. soln. was mixed with NH4OH aq. soln. (NH3 29 wt.%) in a tank to form Zr(OH)2 fines. A jet flow was fed into the soln. from the bottom of the tank to prevent the coagulation of the formed Zr(OH)2 fines. .