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Precursor of alumina sintered body, method for producing alumina sintered body, method for producing abrasive grains, and alumina sintered body

A manufacturing method, alumina technology, applied in the direction of chemical instruments and methods, manufacturing tools, abrasives, etc., can solve the problems of increased production costs, difficulty in obtaining dense sintered bodies, sintering hindrance, etc., and achieve the effect of dense mechanical properties

Pending Publication Date: 2020-06-30
RESONAC CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, in the case of an alumina sintered body to which yttrium oxide is added as described above, sintering is hindered by the addition of yttrium oxide, and it is difficult to obtain a dense sintered body. In order to obtain a dense sintered body, heat treatment at a high temperature is required.
Therefore, in the manufacture of such an alumina sintered body, there is a problem that the production cost increases

Method used

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  • Precursor of alumina sintered body, method for producing alumina sintered body, method for producing abrasive grains, and alumina sintered body
  • Precursor of alumina sintered body, method for producing alumina sintered body, method for producing abrasive grains, and alumina sintered body
  • Precursor of alumina sintered body, method for producing alumina sintered body, method for producing abrasive grains, and alumina sintered body

Examples

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Effect test

Embodiment 1

[0113] Alumina raw material powder (alumina (Al 2 o 3 ) content: 99.75% by mass, α crystallization rate of alumina: 99% or more, d 50 : 0.62μm) 1,000g, iron oxide (manufactured by Kanto Chemical Co., Ltd.), d 50 : 0.52 μm) and 3.4 g of granular polyvinyl alcohol (manufactured by Kuraray Co., Ltd., model number PVA-205) were mixed for 10 minutes. Thereafter, an aqueous yttrium (III) acetate tetrahydrate aqueous solution in which 2.5 g of yttrium (III) acetate tetrahydrate (manufactured by Kanto Chemical Co., Ltd.) was dissolved in 300 g of distilled water was prepared, and this aqueous solution was added to the above mixture, Mixing and stirring were performed for 30 minutes to prepare a precursor of an alumina sintered body. Table 1 shows the compounding composition based on the above-mentioned feed composition.

[0114] In addition, the composition of the said alumina raw material powder was previously confirmed by the fluorescent X-ray elemental analysis method. As a me...

Embodiment 2～9 and comparative example 5

[0170] In Examples 2 to 9 and Comparative Example 5, except that the compounding amount of yttrium (III) acetate tetrahydrate was changed as in the compounding composition shown in Table 2, alumina sintering was obtained by the same method as in Example 1. body precursors.

Embodiment 10～19

[0172] In Examples 10-19, the precursor of the alumina sintered body was obtained by the method similar to Example 1 except having changed the compounding quantity of iron oxide like the compounding composition shown in Table 2.

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Abstract

A precursor of an alumina sintered body contains aluminum, yttrium and at least one metal selected from the group consisting of iron, zinc, cobalt, manganese, copper, niobium, antimony, tungsten, silver and gallium, and which is configured such that: the content of the aluminum is 98.0% by mass or more in terms of oxide (Al2O3) in 100% by mass of the precursor of an alumina sintered body; the content of the yttrium is 0.01-1.35 parts by mass in terms of oxide (Y2O3) relative to 100 parts by mass of the content of the aluminum in terms of oxide; the total content of the metals selected from theabove-described group is 0.02-1.55 parts by mass in terms of oxides relative to 100 parts by mass of the content of the aluminum in terms of oxide; and the aluminum is contained in the form of alpha-alumina.

Description

technical field [0001] The present invention relates to a precursor of an alumina sintered body, a method for producing an alumina sintered body, a method for producing abrasive grains, and an alumina sintered body. Background technique [0002] Alumina sintered compacts have characteristics such as high hardness, high strength, high heat resistance, high wear resistance, and high chemical resistance, and are used in various industrial fields. In particular, abrasive grains are used as raw materials for heavy-duty grinding wheels in the steel industry. [0003] In addition, recently, heavy-duty grinding wheels with a larger "grinding ratio" than before have been demanded in the market. Here, the "grinding ratio" is an index showing the performance of the grinding wheel, and is represented by the following formula (A). It can be said that the larger the grinding ratio, the better the performance of the grinding wheel. [0004] Grinding ratio = amount of material to be proc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/117B24D3/00C09K3/14
CPCB24D3/00C04B35/111C04B2235/3217C04B2235/5445C04B2235/3272C04B2235/3225C04B2235/449C04B2235/3284C04B2235/3275C04B2235/3281C04B2235/3251C04B2235/3294C04B2235/3291C04B2235/3258C04B2235/3286C04B2235/77C04B2235/3418C04B2235/3201C04B2235/3206C04B2235/3208C04B2235/72C04B2235/3265C04B2235/786C04B2235/96C09K3/1409C04B35/1115C04B35/117C04B35/64C09K3/14C04B2235/40C04B35/10C04B2235/404C04B2235/405C04B2235/407C04B2235/408C09K3/1418
Inventor 宫石壮饭生悟史
Owner RESONAC CORPORATION