公开(公告)号：US11479475B2

公开(公告)日：2022-10-25

申请号：US15931269

申请日：2020-05-13

Applicant: Zhengzhou University

Inventor： Jie Chen ,  Jilin He ,  Benshuang Sun ,  Yongchun Shu ,  Xueyun Zeng ,  Yang Liu

IPC: C01G15/00

Abstract: A method of preparing an indium oxide spherical powder with a controllable grain shape includes: (1) reacting a sulfuric acid solution, and then adding a nitric acid solution, to react with the metal indium to obtain a mixed solution system containing indium sulfate and indium nitrate; (2) adjusting a concentration of indium ions in the mixed solution system to between 0.45˜0.6M; (3) performing a precipitation reaction of the mixed solution with a precipitant, until a pH value of the solution is between 9˜10, and then having the solution precipitated and aged to obtain an indium hydroxide precursor slurry; (4) using a ceramic membrane to filter and wash the precursor slurry, and ending the washing to obtain a purified precursor sample; (5) drying the precursor sample at 80˜130° C.; and (6) ball-milling the precursor sample, and calcining the precursor at a calcination temperature to obtain the indium oxide powder.

公开(公告)号：US11859314B2

公开(公告)日：2024-01-02

申请号：US17834238

申请日：2022-06-07

Applicant: ZHENGZHOU UNIVERSITY

Inventor： Xiaochao Wu ,  Qingkui Li ,  Jing Zhang ,  Kaijun Yang ,  Chengduo Wang ,  Jilin He

IPC: C30B7/08 ,  C30B33/02

CPC classification number: C30B7/08 ,  C30B33/02

Abstract: A method for preparing large size beta-type ammonium tetramolybdate monocrystal particle includes industrial ammonium molybdate, ammonia, de-ionized water are used to prepare ammonium molybdate solution with concentration of 0.2˜0.6 g/ml; pH is adjusted to 5˜7, temperature is adjusted to the first temperature of 70˜90° C. to obtain the first ammonium molybdate solution; beta-type ammonium tetramolybdate crystal seed is put into crystallization container, and the first ammonium molybdate solution is poured in the crystallization container, to form crystallization system; the crystallization system stands still at room temperature, naturally cooling, the beta-type ammonium tetramolybdate crystal seed grows into large size beta-type ammonium tetramolybdate monocrystal particle. A beta-type ammonium tetramolybdate crystal seed is obtained by constant-temperature crystallization at 70˜90° C. The obtained beta-type ammonium tetramolybdate crystal seed is put stewing in the first ammonium molybdate solution and is naturally cooling to produce large size beta-type ammonium tetramolybdate monocrystal particle forms.

公开(公告)号：US11486034B2

公开(公告)日：2022-11-01

申请号：US15930912

申请日：2020-05-13

Applicant: Zhengzhou University

Inventor： Jilin He ,  Benshuang Sun ,  Yongchun Shu ,  Yang Liu ,  Jie Chen ,  Xueyun Zeng

IPC: C23C14/34 ,  C04B35/457 ,  C04B35/626 ,  C04B35/638 ,  C04B35/634 ,  C04B35/636 ,  C04B35/64 ,  C04B111/00

Abstract: A method of preparing an ITO ceramic target includes that: In2O3 powder with mass fraction of 90˜97 and SnO2 powder with mass fraction of 10˜3 are ball-milled and mixed with deionized water, diluent, binder and polymer material by a sand mill to obtain an ITO ceramic slurry with a solid content between 70˜80% and a viscosity between 120˜300 mpa·s, with an average particle size D50 of the mixed powder controlled at 100˜300 nm; the ITO ceramic slurry is shaped by a pressure grouting to obtain an ITO ceramic green body with a relative density of 58˜62%; the ITO ceramic green body is put into a degreasing and sintering integrated furnace, and under a degreasing temperature of 700˜800° C., the ITO ceramic target is degreased in an atmospheric oxygen atmosphere for the time set to 12˜36 hours; the temperature increases from the degreasing temperature to the first sintering temperature of 1,600˜1,650° C.