Titanium nitride reinforced zirconia toughened alumina ceramic powder and preparation method thereof

A technology of alumina ceramic powder and zirconia, which is applied in chemical instruments and methods, zirconium compounds, inorganic chemistry, etc., can solve the problems of poor electrical conductivity, low hardness, etc., and achieve enhanced electrical conductivity, reduced inhomogeneity, and improved thermal conductivity. The effect of stability

Pending Publication Date: 2019-07-16
中国有色桂林矿产地质研究院有限公司
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But the low hardness and poor co

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  • Titanium nitride reinforced zirconia toughened alumina ceramic powder and preparation method thereof
  • Titanium nitride reinforced zirconia toughened alumina ceramic powder and preparation method thereof

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[0020] The invention provides a method for preparing titanium nitride-reinforced zirconia-toughened alumina ceramic powder, which comprises the following steps:

[0021] 1) mixing aluminum salts, zirconium salts, yttrium salts, and titanium salts with water to obtain a mixed aqueous solution; the aluminum salts, zirconium salts, yttrium salts, and titanium salts are water-soluble inorganic salts;

[0022] 2) Precipitate by mixing the mixed aqueous solution obtained in step 1) with an alkaline precipitant to obtain a hydroxide precipitated powder;

[0023] 3) The hydroxide precipitated powder obtained in the step 2) is subjected to the first calcination and the second calcination in sequence to obtain the oxide solid solution powder; the temperature of the first calcination is 700-850°C, and the time is 6-6 12h; the temperature of the second calcination is 900-1000°C, and the time is 1-3h;

[0024] 4) The oxide solid solution powder obtained in the step 3) is subjected to a se...

Embodiment 1

[0048] Add zirconium oxychloride (ZrOCl) to water 2 ·8H 2 O), aluminum chloride (AlCl 3 ) and yttrium chloride (YCl 3 ), titanium sulfate (Ti(SO ) 4 ) 2 ) to prepare a mixed aqueous solution, the molar ratio of aluminum chloride, zirconium oxychloride and titanium sulfate is 60:25:15, and the molar ratio of zirconium oxychloride to yttrium chloride is 98.5:3. After mixing evenly, add ammonia water, fully stir and precipitate, filter, wash with water and absolute ethanol in sequence, and dry to obtain hydroxide precipitated powder. The obtained hydroxide precipitated powder was calcined in air at 700°C for 9 hours, and further calcined at 900°C for 1 hour to obtain oxide solid solution powder (Al 2 o 3 , ZrO 2 , Y 2 o 3 and TiO 2 ). Will Al 2 o 3 -ZrO 2 -Y 2 o 3 -TiO 2 Put the solid solution powder into a 99% alumina porcelain boat, then put the alumina porcelain boat into a vacuum tube-type high-temperature electric furnace, feed flowing high-purity ammonia ga...

Embodiment 2

[0052] Add zirconium oxychloride (ZrOCl) to water 2 ·8H 2 O), aluminum nitrate (AlNO 3 ) and yttrium nitrate (Y(No 3 ) 3 ), titanium sulfate (Ti(SO ) 4 ) 2 ) to prepare a mixed aqueous solution, the molar ratio of zirconium oxychloride, aluminum nitrate and titanium sulfate is 60:25:15, and the molar ratio of zirconium oxychloride to yttrium chloride is 97.5:3. After mixing evenly, add ammonia water, fully stir and precipitate, filter, wash with water and absolute ethanol in sequence, and dry to obtain hydroxide precipitated powder. The obtained hydroxide precipitated powder was calcined in air at 700°C for 9 hours, and further calcined at 900°C for 1 hour to obtain oxide solid solution powder (Al 2 o 3 , ZrO 2 , Y 2 o 3 and TiO 2 ). Will Al 2 o 3 -ZrO 2 -Y 2 o 3 -TiO 2 Put the solid solution powder into a 99% alumina porcelain boat, then put the alumina porcelain boat into a vacuum tube-type high-temperature electric furnace, feed flowing high-purity ammonia...

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Abstract

The invention provides titanium nitride reinforced zirconia toughened alumina ceramic powder and a preparation method thereof, and belongs to the technical field of ceramic materials. The preparationmethod comprises the following steps: mixing an aluminum salt, a zirconium salt, a yttrium salt, a titanium salt and water to obtain a mixed water solution, wherein the aluminum salt, the zirconium salt, the yttrium salt and the titanium salt are water-soluble inorganic salts; mixing the obtained mixed water solution with an alkaline precipitant for precipitation to obtain hydroxide precipitated powder; sequentially carrying out first calcining and second calcining on the obtained hydroxide precipitated powder to obtain oxide solid solution powder; and carrying out a selective nitriding reaction on the obtained oxide solid solution powder to obtain the titanium nitride reinforced zirconia toughened alumina ceramic powder. A ceramic material obtained by carrying out hot-pressing sintering on the titanium nitride reinforced zirconia toughened alumina ceramic powder provided by the invention is high in hardness and good in conductivity.

Description

technical field [0001] The invention relates to the technical field of ceramic materials, in particular to a titanium nitride-reinforced zirconia-toughened alumina ceramic powder and a preparation method thereof. Background technique [0002] The mechanical, electrical, and optical properties of a material not only depend on the properties of each component in the material, but are also closely related to the macroscopic and microscopic structures between the components of the material. In recent years, the preparation technology of advanced ceramic materials is developing towards a finer and microscopically controllable direction, emphasizing the molecular and atomic scale compounding of ceramic materials and the preparation of materials based on solid solution. In the research of advanced ceramic materials, material preparation and material modification technologies related to solid solution systems, including solid solution strengthening, solid solution doping, solid solu...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/626
CPCC04B35/10C04B35/62605C04B2235/3244C04B2235/3886C04B2235/3225C04B2235/5454C04B2235/96C04B35/62655C04B35/62675C04B35/119C04B2235/3232C04B2235/3217C04B2235/444C04B2235/448C04B2235/443C04B2235/449C04B2235/465C04B35/645C01G25/006C04B35/106C04B35/62635C04B35/6265
Inventor 陈超陈家荣莫培程
Owner 中国有色桂林矿产地质研究院有限公司
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