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    METHOD OF PREPARING ALUMINUM NITRIDE POWDER THROUGH ATMOSPHERE CONTROLLED CARBON-THERMAL REDUCTION
    1.
    发明申请
    METHOD OF PREPARING ALUMINUM NITRIDE POWDER THROUGH ATMOSPHERE CONTROLLED CARBON-THERMAL REDUCTION 审中-公开
    通过大气控制碳热还原制备氮化铝粉末的方法

    公开(公告)号：US20160257568A1

    公开(公告)日：2016-09-08

    申请号：US14962741

    申请日：2015-12-08

    Applicant: National Chung-Shan Institute of Science and Technology

    Inventor： Kuan-Ting Lai ,  Chi-Shiung Hsi ,  Min-Yu Yang

    IPC: C01B21/072

    CPC classification number: C01B21/0726 ,  C01P2002/72

    Abstract: A method of preparing aluminum nitride powder through atmosphere controlled carbon-thermal reduction. It relates to a chemical dilution method to wrap the carbon material evenly around the surface of γ-aluminum oxide (gamma phase-aluminum oxide). The method includes the following processes of: material mixing, carbonization, carbon-thermal reduction, and de-carbonization. Wherein, γ-aluminum oxide and phenolic resin are mixed to form a solution, and after the solution is baked and dried into powder, it is carbonized under nitridation atmosphere in high temperature. Then, carbon-thermal reduction is performed in a temperature of 1400° C.˜1700° C. Finally, de-carbonized is performed in air. In the process of carbon-thermal reduction, ammonia gas and hydrogen gas are added to regulate the reacting atmosphere. Also, urea is added to increase the nitridation reaction of aluminum.

    Abstract translation: 一种通过大气控制碳热还原制备氮化铝粉末的方法。 它涉及一种将碳材料均匀地包裹在γ-氧化铝（γ相 - 氧化铝）表面的化学稀释方法。 该方法包括以下方法：材料混合，碳化，碳热还原和脱碳。 其中，将γ-氧化铝和酚醛树脂混合形成溶液，将溶液烘干并干燥成粉末后，在高温氮化气氛中碳化。 然后，在1400℃〜1700℃的温度下进行碳热还原。最后，在空气中进行脱碳化。 在碳热还原过程中，加入氨气和氢气来调节反应气氛。 此外，加入尿素以增加铝的氮化反应。

    Method for preparing spherical aluminum oxynitride powder
    2.
    发明授权
    Method for preparing spherical aluminum oxynitride powder 有权

    公开(公告)号：US10144645B1

    公开(公告)日：2018-12-04

    申请号：US15661045

    申请日：2017-07-27

    Applicant: NATIONAL CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY

    Inventor： Kuan-Ting Lai ,  Chun-Te Wu ,  Cheng-Hung Shih ,  Yang-Kuo Kuo ,  Lea-Hwung Leu

    IPC: C01B21/082

    Abstract: A method for preparing spherical aluminum oxynitride powder, comprising the steps of (A) providing an alumina powder and a resin, both of which are then dispersed and dissolved in a solvent to form a mixed slurry; (B) subjecting the mixed slurry to spray drying to form a spherical powder; (C) subjecting the spherical powder to a carbonization treatment under an inert atmosphere to form a carbonized spherical powder; (D) subjecting the carbonized spherical powder to carbothermic reduction in a nitrogen-containing atmosphere at a temperature of 1450° C. to 1550° C.; (E) keeping the spherical powder that has been subjected to carbothermic reduction in the nitrogen-containing atmosphere to carry out a nitridation reaction at a temperature of 1700° C. to 1730° C., forming a nitrided spherical aluminum oxynitride powder; (F) subjecting the nitrided spherical aluminum oxynitride powder to decarbonization in an oxygen-containing atmosphere to form the spherical aluminum oxynitride powder.

    Method for producing spherical silicon nitride powder
    3.
    发明授权
    Method for producing spherical silicon nitride powder 有权

    公开(公告)号：US10384941B2

    公开(公告)日：2019-08-20

    申请号：US15839995

    申请日：2017-12-13

    Applicant: NATIONAL CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY

    Inventor： Chun-Te Wu ,  Kuan-Ting Lai ,  Cheng-Hung Shih ,  Yang-Kuo Kuo

    IPC: C01B21/082

    Abstract: A method utilizes easily obtained carbon as carbon source for sintering, followed by high energy ball milling process with planetary ball mill for high energy homogenous mixing of the carbon source, solvent and nano-level silicon dioxide powder, along with a high energy ball milling process repeatedly performed using different sized ball mill beads, so as to formulate a spray granulation slurry with the optimal viscosity, to complete the process of micronization of carbon source evenly encapsulated by silicon dioxide powders. The optimal ratio of C/SiO2 is 1-2.5 to produce a spherical silicon dioxide powder (40-50 μm) evenly encapsulated by the carbon source. The powder is then subjected to a high temperature (1450□) sintering process under nitrogen gas. Lastly, the sintered silicon nitride powder is subjected to homogenizing carbon removal process in a rotational high temperature furnace to complete the fabricating process.

    Method for Preparing Large-area Catalyst Electrode
    5.
    发明申请
    Method for Preparing Large-area Catalyst Electrode 有权

    公开(公告)号：US20210123152A1

    公开(公告)日：2021-04-29

    申请号：US17076815

    申请日：2020-10-22

    Applicant: National Chung-Shan Institute of Science and Technology

    Inventor： Kuan-Ting Lai ,  Chung-Yen Lu ,  Chia-Kan Hao

    IPC: C25D13/02 ,  C25D13/12 ,  C25B11/04 ,  C25B1/04

    Abstract: A method for preparing a large-area catalyst electrode includes the following steps: (A) providing an iron compound, a cobalt compound and a nickel compound, and dissolving these metal compounds in a solvent to form a mixed metal compound solution, and (B) providing a cathode and an anode, and performing a cathodic electrochemical deposition to the cathode, the anode and the mixed metal compound solution in a condition of constant voltage or constant current through a two-electrode method, followed by obtaining a catalyst electrode from the cathode. In the method for preparing the large-area catalyst electrode of the present invention, the large-area catalyst electrode having good dual-function water electrolysis catalytic property can be prepared by the steps of preparing the electrolyte, the electrochemical deposition, and the like. The process is simple and energy-saving.

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