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Manufacturing method of crucible for producing niobium oxide or tantalum oxide

A manufacturing method and technology of tantalum oxide, which is applied in the field of crucible manufacturing, can solve the problems of increasing the production cost of high-purity niobium oxide or high-purity tantalum oxide, and achieve the effects of low production cost, avoiding secondary pollution, and long service life

Active Publication Date: 2015-01-21
稀美资源(广东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with method 1, this method has the characteristics of high yield and relatively long service life, but because its main components are high-purity niobium oxide and high-purity tantalum oxide, the production cost is dozens of times or more than one hundred of ordinary crucibles At the same time, the crucible is a consumable item, so the production cost of high-purity niobium oxide or high-purity tantalum oxide is greatly increased

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0023] (2) Preparation of crucible coating slurry

[0024] Mix 200~400ml of glycerin and 800~1000ml of deionized water evenly, heat to 50~70℃, add 50~100g of bone glue, after the bone glue dissolves, add 200~500g of high-purity niobium oxide or high-purity tantalum oxide that passed through a 150-mesh sieve, Stir evenly to obtain the crucible coating slurry;

[0025] Among them, the viscosity of the slurry satisfies: 100ml of the slurry passes through a funnel with a diameter of 6mm, and the time for all the slurry to flow out is 4~8s.

[0026] (3) Coating

[0027] Apply the crucible coating slurry obtained in step (2) evenly on the inner surface of the crucible body obtained in step (1), and let it dry naturally, and the coating thickness is determined according to requirements;

[0028] (4) Sintering and shaping

[0029] The crucible body coated with the crucible coating is sintered at high temperature. The sintering temperature of the crucible for the production of high-...

Embodiment 1

[0035] Embodiment one: the manufacture of crucible for niobium oxide production

[0036] A method for manufacturing a crucible for high-purity niobium oxide production, comprising the following steps:

[0037] (1) Production of alumina crucible body

[0038] Choose 95% pure alumina as the material of the crucible, make the embryo body according to the shape of the crucible, and dry it at room temperature;

[0039] (2) Preparation of crucible coating slurry

[0040] Mix 200ml of glycerin and 800ml of deionized water evenly, heat to 50°C, add 50g of bone glue, after the bone glue dissolves, add 200g of high-purity niobium oxide that has passed through a 150-mesh sieve, and stir evenly to obtain a crucible coating slurry;

[0041] Use a funnel with a diameter of 6mm to check the viscosity of the prepared slurry, and the time for all the 100ml slurry to flow out is 4s;

[0042] (3) Coating

[0043] Apply the crucible coating slurry obtained in step (2) evenly on the inner surf...

Embodiment 2

[0047] Embodiment two: the manufacture of crucible for niobium oxide production

[0048] A method for manufacturing a crucible for high-purity niobium oxide production, comprising the following steps:

[0049] (1) Production of alumina crucible body

[0050] Choose 95% pure alumina as the material of the crucible, make the embryo body according to the shape of the crucible, and dry it at room temperature;

[0051] (2) Preparation of crucible coating slurry

[0052] Stir 250ml of glycerin and 850ml of deionized water evenly, heat to 60°C, add 70g of bone glue, after the bone glue is dissolved, add 300g of high-purity niobium oxide that has passed through a 150-mesh sieve, and stir evenly to obtain a crucible coating slurry;

[0053] Use a funnel with a diameter of 6mm to check the viscosity of the prepared slurry, and the time for all the 100ml slurry to flow out is 6s;

[0054] (3) Coating

[0055]Apply the crucible coating slurry obtained in step (2) evenly on the inner s...

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Abstract

The invention discloses a manufacturing method of a crucible for producing niobium oxide or tantalum oxide. The manufacturing method comprises the following steps of: (1) manufacturing a crucible blank by using aluminium oxide with the purity of 95%; (2) uniformly mixing 200-400ml of glycerin and 800-1000ml of deionized water, heating the mixture to 50-70 DEG C, adding 50-100g of bone glue, adding 200-500g of niobium oxide or antalum oxide powder after the bone glue is dissolved, uniformly stirring to obtain crucible coating slurry; (3) uniformly coating the crucible coating slurry on the inner surface of the crucible blank, and naturally drying, wherein the thickness of the coating is determined according to requirements; and (4) sintering the crucible blank coated with the crucible coating at a high temperature to obtain the crucible for producing the niobium oxide or tantalum oxide. The manufacturing method disclosed by the invention is simple in process and low in production cost; and the production cost of the crucible with the volume of 3.0 liters is about 120 yuan, and is only 1 / 8 or lower of the cost of a niobium oxide crucible or a tantalum oxide crucible.

Description

technical field [0001] The invention relates to a method for manufacturing a crucible, in particular to a method for manufacturing a crucible for producing high-purity niobium oxide and high-purity tantalum oxide. Background technique [0002] In the production process of high-purity niobium oxide and high-purity tantalum oxide, its hydroxide needs to be calcined to convert it into oxide. Calcination in Furnace. However, in the prior art, clay, mullite, corundum, alumina or graphite are used to make crucibles. At a high temperature of 700-900°C, ammonium fluoride in tantalum-niobium hydroxide will interact with the crucible. The reaction of impurities such as silicon and aluminum in the crucible will corrode and pulverize the contact part between the crucible and the tantalum-niobium hydroxide, and the obtained product will be polluted. [0003] At present, the calcination production of high-purity niobium oxide and high-purity tantalum oxide all use niobium oxide crucible...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/87
Inventor 石波钟岳联杨博吴宇锦
Owner 稀美资源(广东)有限公司
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