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Intragranular particle (ZrB2/Al2O3) and preparation device and method
The invention discloses an intragranular particle (ZrB2/Al2O3) and its preparation device and method. The intragranular particle (ZrB2/Al2O3) is an alpha-Al2O3 and ZrB2 composite-phase particle with an intragranular structure. The preparation process comprises the following steps: Al, ZrO2 and B2O3 powders of a reaction system Al-ZrO2-B2O3 are mixed and ball-milling is then carried out, wherein molar ratio of Al to ZrO2 to B2O3 is (6-10):1:1; the ball-milled powder is dried and extruded to a blank sample, the blank sample is placed to a sample pad in the preparation device, and a quartz glass tube is vacuumized through a vacuum pump; input current of an induction coil is controlled, the blank sample undergoes a reaction by an induction heating graphite crucible, and reaction temperature of the blank sample is observed through a thermocouple and a temperature indicator; and thermal insulation is carried out after the reaction so as to obtain an intragranular composite-phase particle (ZrB2/Al2O3) block. By a medium-frequency induction vacuum heating device, two clean pollution-free micro-nano particles are firstly generated, and then intragranular growth is promoted by graphite electromagnetic induction heating and reaction exotherm. The method provided by the invention is simple to operate and is safe, reliable, energy-saving, time-saving and environmentally friendly.
Intragranular particle (ZrB2/Al2O3) and preparation device and method
The invention discloses an intragranular particle (ZrB2/Al2O3) and its preparation device and method. The intragranular particle (ZrB2/Al2O3) is an alpha-Al2O3 and ZrB2 composite-phase particle with an intragranular structure. The preparation process comprises the following steps: Al, ZrO2 and B2O3 powders of a reaction system Al-ZrO2-B2O3 are mixed and ball-milling is then carried out, wherein molar ratio of Al to ZrO2 to B2O3 is (6-10):1:1; the ball-milled powder is dried and extruded to a blank sample, the blank sample is placed to a sample pad in the preparation device, and a quartz glass tube is vacuumized through a vacuum pump; input current of an induction coil is controlled, the blank sample undergoes a reaction by an induction heating graphite crucible, and reaction temperature of the blank sample is observed through a thermocouple and a temperature indicator; and thermal insulation is carried out after the reaction so as to obtain an intragranular composite-phase particle (ZrB2/Al2O3) block. By a medium-frequency induction vacuum heating device, two clean pollution-free micro-nano particles are firstly generated, and then intragranular growth is promoted by graphite electromagnetic induction heating and reaction exotherm. The method provided by the invention is simple to operate and is safe, reliable, energy-saving, time-saving and environmentally friendly.
Intragranular particle (ZrB2/Al2O3) and preparation device and method
ZHU HEGUO (author) / CUI TAO (author) / YU ZHULI (author) / XU CHI (author) / GUO GUANHONG (author)
2015-09-02
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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