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Preparation method of ZrB2 powder material

A technology of powder materials and materials, which is applied in the field of preparation of Zr, B powder materials, can solve the problems of high cost and low purity, and achieve the effects of low pollution, simple production process and simple preparation process

Inactive Publication Date: 2013-01-09
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the magnesia thermal reduction boron preparation process mainly has the disadvantages of high cost and low purity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] According to mass percentage Mg: 38.66, B 2 o 3 : 22.14, ZrO 2 : 39.19 Take the raw material powder; then put the weighed raw material powder into a stainless steel ball mill tank, mix evenly in a planetary ball mill, the ball milling time is 8 hours, the rotating speed is 150r / min, and the ball-to-material ratio is 1:2. The ball milling medium is Al 2 o 3 ball. Then the uniformly mixed reaction material is placed in a mold of 250g and becomes a round cake under a pressure of 15MPa with a press; the formed block material is put into a reaction vessel, and an ignition agent is put on its bottom surface; At room temperature, fill the reaction vessel with 0.5MPa argon, and exhaust it after 2 minutes, so that the reaction material is in the protection of the argon atmosphere; then heat it, and exhaust it again when the temperature of the reaction vessel rises to 200°C, then Fill in 2MPa argon to continue heating; when the temperature in the reaction vessel reaches 298°...

Embodiment 2

[0014] According to mass percentage Mg: 40.92, B 2 o 3 : 21.33, ZrO 2 : 37.75 Weigh the raw material powder; then put the weighed raw material powder into a stainless steel ball mill tank, mix evenly in a planetary ball mill, the ball mill time is 8 hours, the rotating speed is 150r / min, and the ball-to-material ratio is 1:2. The ball milling medium is Al 2 o 3 ball. Then the uniformly mixed reaction material is placed in a mold of 250g and becomes a round cake under a pressure of 15MPa with a press; the formed block material is put into a reaction vessel, and an ignition agent is put on its bottom surface; At room temperature, fill the reaction vessel with 0.5MPa argon, and exhaust it after 2 minutes, so that the reaction material is in the protection of the argon atmosphere; then heat it, and exhaust it again when the temperature of the reaction vessel rises to 200°C, then Fill in 2MPa argon to continue heating; when the temperature in the reaction vessel reaches 298°C,...

Embodiment 3

[0016] According to mass percentage Mg: 43.04, B 2 o 3 : 20.57, ZrO 2 : 36.40 Weigh the raw material powder; then put the weighed raw material powder into a stainless steel ball mill tank, mix evenly in a planetary ball mill, the ball milling time is 8 hours, the rotating speed is 150r / min, and the ball-to-material ratio is 1:2. The ball milling medium is Al 2 o 3 ball. Then the uniformly mixed reaction material is placed in a mold of 250g and becomes a round cake under a pressure of 15MPa with a press; the formed block material is put into a reaction vessel, and an ignition agent is put on its bottom surface; At room temperature, fill the reaction vessel with 0.5MPa argon, and exhaust it after 2 minutes, so that the reaction material is in the protection of the argon atmosphere; then heat it, and exhaust it again when the temperature of the reaction vessel rises to 200°C, then Fill in 2MPa argon to continue heating; when the temperature in the reaction vessel reaches 298...

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Abstract

The invention relates to a preparation method of a ZrB2 powder material, which comprises the following steps: (1) preparing 38.66-43.04 wt% of Mg, 22.14-20.57 wt% of B2O3 and 39.19-36.40 wt% of ZrO2; (2) putting the weighed powder raw materials into a ball milling tank, and evenly mixing in a planetary ball mill; (3) putting the evenly mixed reaction materials in a die to obtain a round cake under the pressure of 10-60 MPa; putting the formed lump material into a reaction vessel, and putting a detonator on the bottom surface; charging 0.5-1.5 MPa argon gas into the reaction vessel at room temperature; heating, discharging the gas when the temperature of the reaction vessel rises to 180-200 DEG C, charging 1.5-5 MPa argon gas, and continuing heating; when the temperature in the reaction vessel reaches 250-300 DEG C, the detonator is combusted until all the material is reacted; and (4) carrying out furnace cooling on the product to room temperature under the argon shield, washing the prepared material with hydrochloric acid for 5-15 days, washing with distilled water, separating, and carrying out vacuum drying to obtain the ZrB2 powder material.

Description

technical field [0001] The invention relates to the preparation of powder materials containing Zr and B. Background technique [0002] ZrB 2 It is a very potential special ceramic material and a typical material of ultra-high temperature structural ceramics. ZrB 2 Ceramics have a high melting point (3245°C), high hardness (22GPa), good thermal conductivity and electrical conductivity (9.2×10 -6 Ω), excellent corrosion resistance and thermal shock resistance, stable solid phase and other characteristics, in addition, it also has special properties such as good chemical stability, neutron capture, flame retardancy, heat resistance, corrosion resistance and light weight. Domestic to ZrB 2 The researches were mainly in the 1960s and 1990s. In the early 1960s, due to the needs of my country's nuclear industry and rocket technology, ZrB 2 Research. In the 1990s, it was used in composite materials, high temperature thermocouple protection tubes, metallurgical metal crucible ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B35/04
Inventor 喇培清鞠倩卢学峰魏玉鹏郭鑫王鸿鼎
Owner LANZHOU UNIVERSITY OF TECHNOLOGY