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High-flexibility 95 ceramic and preparation method thereof

A technology with high toughness and particle size, applied in the field of ceramic materials, can solve problems affecting the performance of sintered bodies, achieve high toughness, tight combination, and promote the effect of crystal transformation

Inactive Publication Date: 2016-07-06
洛阳三睿宝纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sintering temperature of 95 porcelain is generally 1580~1700°C, and a large number of glass phases will appear during the sintering process, which will affect the performance of the sintered body

Method used

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  • High-flexibility 95 ceramic and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for preparing high-toughness 95 porcelain, comprising the following steps: Step 1: Take magnesium hydroxide nanocrystals, place it at 400°C for 20 minutes, and then cool it to room temperature at a cooling rate of 10°C / h to prepare MgO nanoscale crystals, spare;

[0026] Step 2: Take the boehmite nano-whisker crystal seeds, place them in the Bayer process mother liquor, induce at a constant temperature at 95°C for 5 hours, and cool naturally to room temperature to obtain crystallization products; filter the crystallization products with suction and dry Dry and grind into powder, place the split body in deionized water for ultrasonic treatment for 1 h, and after standing still for 24 h, dry and grind at 90°C to obtain boehmite nano whiskers, place boehmite nano whiskers at 1300 ℃ for 30 minutes, and cooled to room temperature at a cooling rate of 5°C / h to prepare α-Al 2 o 3 Nanoscale crystals, spare; the α-Al 2 o 3 The XRD patterns of nanoscale crystals are ...

Embodiment 2

[0036] A method for preparing high-toughness 95 porcelain, comprising the following steps: Step 1: Take magnesium hydroxide nanocrystals, place it at 400°C for 20 minutes, and then cool it to room temperature at a cooling rate of 5°C / h to prepare MgO nanoscale crystals, spare;

[0037] Step 2: Take the boehmite nano-whisker crystal seeds, place them in the Bayer process mother liquor, induce at a constant temperature at 95°C for 5 hours, and cool naturally to room temperature to obtain crystallization products; filter the crystallization products with suction and dry Dry and grind into powder, place the split body in deionized water for ultrasonic treatment for 2 hours, after standing still for 40 hours, dry and grind at 85°C to obtain boehmite nano whiskers, place boehmite nano whiskers at 1250 ℃ for 10 minutes, and cooled to room temperature at a rate of 10℃ / h to prepare α-Al 2 o 3 nanoscale crystals, spare;

[0038] Step 3, according to MgO, α-Al 2 o 3 , Suzhou soil, s...

Embodiment 3

[0046] A preparation method of high-toughness 95 porcelain, comprising the following steps: step 1, taking magnesium hydroxide nanocrystals, and placing it at 400°C for 20 minutes, then cooling to room temperature at a cooling rate of 8°C / h to obtain MgO nanoscale crystals, spare;

[0047] Step 2: Calcining the boehmite nanocrystals at 1100°C for 22 minutes, and cooling to room temperature at a cooling rate of 8°C / h to prepare α-Al 2 o 3 nanoscale crystals, spare;

[0048] Step 3, according to MgO, α-Al 2 o 3 , Suzhou soil, silicon dioxide, and calcium carbonate=5:89.78:1.43:1.45:3.07 weight ratio, weigh the MgO prepared in step 1, and the α-Al prepared in step 2 in sequence 2 o 3 , Suzhou soil, silicon dioxide and calcium carbonate are mixed into raw meal, and the raw meal is placed in a ball mill for pulverization and ball milling until the particle size is less than 360 meshes, forming a powder for later use;

[0049] Step 4: Sieve the powder obtained by the above-men...

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Abstract

A kind of high-toughness 95 porcelain and preparation method thereof, the raw material of preparing 95 porcelain is made of MgO nanocrystal, α-Al 2 o 3 Nanocrystalline, Suzhou soil, silicon dioxide and calcium carbonate are composed according to weight ratio (0~5): (89.78~94.50): (1.36~1.43): (1.42~1.50): (2.99~3.15); 95 preparation methods include The steps of preparing raw meal, ball milling the raw meal into powder, making slurry, removing iron, granulating, particle grading, molding and firing. The present invention uses magnesium hydroxide nanocrystals and boehmite nano-whiskers for calcination, and then rapid cooling to obtain dispersed nanoparticles, which can reduce the sintering temperature, promote crystal transformation, and generate ternary or more complex eutectic material, so that the made 95 porcelain is easy to deform without brittle cracks when it is stressed, and has high toughness.

Description

technical field [0001] The invention relates to the technical field of ceramic materials, in particular to a high-toughness 95 porcelain and a preparation method thereof. Background technique [0002] 95 porcelain, namely α-Al 2 o 3 A ceramic material with a content of about 95%. In some extreme environments such as high temperature and high abrasiveness, ceramic products with high hardness and good wear resistance have incomparable advantages over metal materials. 95 porcelain is a very important type of high alumina porcelain. It has high mechanical strength, strong wear resistance, acid and alkali resistance and other chemical erosion capabilities, good electrical insulation performance at room temperature and high temperature, and low loss of mechanical strength at high temperature. 95 porcelain can be widely used in the manufacture of wear-resistant and heat-resistant parts of high-temperature machinery, turbine rotors, electronic components, textile ceramics, ball m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/117
CPCC04B35/117C04B2235/3206C04B2235/3208C04B2235/3418C04B2235/349C04B2235/5445C04B2235/5454
Inventor 许荣辉李洛利肖民乐
Owner 洛阳三睿宝纳米科技有限公司
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