CN103553095A - Method for producing alpha-aluminum oxide fine crystal powder by adding growth inhibitor - Google Patents
Method for producing alpha-aluminum oxide fine crystal powder by adding growth inhibitor Download PDFInfo
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- CN103553095A CN103553095A CN201310497768.XA CN201310497768A CN103553095A CN 103553095 A CN103553095 A CN 103553095A CN 201310497768 A CN201310497768 A CN 201310497768A CN 103553095 A CN103553095 A CN 103553095A
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- aluminum oxide
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Abstract
The invention provides a method for producing alpha-aluminum oxide fine crystal powder by adding a growth inhibitor, which comprises the following steps: 1. uniformly mixing 95.24-96.16% of sintering aid, 1.92-2.86% of magnesium oxide and 1.9-1.92% of magnesium fluoride into a growth inhibitor for later use; 2. grinding industrial aluminum oxide with a ball mill, screening with a grader until the fineness D50 reaches 1 micrometer below, and carrying out research screening on the screened coarse material; 3. adding the growth inhibitor which accounts for 0.03-0.5 wt% of the powder in the step 2, and stirring uniformly; 4. processing the uniformly stirred raw materials into a spherical semifinished product, and calcining in a tunnel kiln at 1250 DEG C; and 5. carrying out dispersion and grinding on the calcined raw materials with a ball mill, thereby obtaining the alpha-aluminum oxide fine crystal powder. The ceramic raw material produced by the method adopts the scientific mode of adding the growth inhibitor, so the raw materials can not expand in the calcination process, and thus, the powder can obtain the fineness of 1 micrometer below, thereby enhancing and optimizing the quality of the ceramic product, and lowering the electric power consumption in the production process.
Description
Technical field
The present invention relates to a kind of production method of ceramic raw material, a kind of interpolation suppresses the method that growth promoter is produced the fine crystalline flour of alpha's aluminium sesquioxide specifically.
Background technology
Present ceramic product manufacturing enterprise, the raw material using is all alpha's alumina powder, this raw material is on the basis of industrial utmost point aluminum oxide powder, through grinding to form fine powder, through high-temperature calcination phase inversion, produce again, but this mode of production can expand with the ratio of tens times and cannot reach needed fineness in fine powder high-temperature calcination process, and this produces to high quality high standard ceramic product and has brought very large difficulty.
Summary of the invention
The object of the invention is to effectively solve the difficulty problem that fine crystalline flour exists of producing, provide a kind of interpolation to suppress the method that growth promoter is produced the fine crystalline flour of alpha's aluminium sesquioxide, can effectively control the expansion existing in high-temperature calcination process and obtain ultra-fine raw material crystalline flour.
The present invention includes to draw together and adopt tunnel furnace to calcine by 1250 ℃ of temperature, the concrete grammar adopting is as follows:
Production method is as follows:
Step 1, get sintering agent 95.24～96.16%, magnesium oxide 1.92～2.86%, magnesium fluoride 1.9～1.92% and mix and make that to suppress production agent stand-by;
Step 2, gets industrial utmost point aluminum oxide and grind by ball mill, then the screening of classified machine reaches below 1 micron fineness D50, screening leach compared with coarse fodder screening after deliberation again;
Step 3, get stand-by inhibition production agent, in step 2 powder weight part 0.03～0.5% ratio, add and stir;
Step 4, by the above-mentioned Raw material processing stirring, be spherical work in-process, adopt tunnel furnace to calcine by 1250 ℃ of temperature;
Step 5, adopt ball mill to carry out dispersion grinding raw material after above-mentioned calcining, produce as the fine crystalline flour of alpha's aluminium sesquioxide.
The present invention has following significantly technical superiority, by added the inhibition production auxiliary materials of scientific combination in raw material production, make aluminum oxide powder can not produce swelling in high-temperature calcination process, thus again through dispersion grinding, can obtain the crystalline flour raw material of ultrafine, solve uncontrollable high-temperature calcination in traditional mode of production mode and produced the technological difficulties that exist for many years that expand and can not produce ultra-fine crystalline flour, there is craft science, favourable optimization and the distinguishing feature that improves ceramic product quality level and reduce production costs.
Embodiment
Embodiment 1: take produce 100Kg pottery crystalline flour raw material as:
Step 1, get sintering agent 95.25%, magnesium oxide 2.85%, magnesium fluoride 1.9% and mix and make that to suppress production agent stand-by; Step 2, gets industrial utmost point aluminum oxide 100Kg and grind by ball mill, then the screening of classified machine reaches below 1 micron fineness D50, screening leach compared with coarse fodder screening after deliberation again; Step 3, get stand-by inhibition production agent, by step 2 powder weight part 0.03%, after meter 0.03Kg adds, stir; Step 4, by the Raw material processing stirring, be spherical work in-process, adopt tunnel furnace to calcine by 1250 ℃ of temperature; Step 5, adopt ball mill to carry out dispersion grinding the raw material after calcining, produce and become the fine crystalline flour of alpha's aluminium sesquioxide.
Embodiment 2: take produce 200Kg pottery crystalline flour raw material as:
Step 1, get sintering agent 95.6%, magnesium oxide 2.5%, magnesium fluoride 1.9% and mix and make that to suppress production agent stand-by; Step 2, gets industrial utmost point aluminum oxide 200Kg and grind by ball mill, then the screening of classified machine reaches below 1 micron fineness D50, screening leach compared with coarse fodder screening after deliberation again; Step 3, get stand-by inhibition production agent, by step 2 powder weight part 0.2%, after meter 0.2Kg adds, stir; Step 4, by the Raw material processing stirring, be spherical work in-process, adopt tunnel furnace to calcine by 1250 ℃ of temperature; Step 5, adopt ball mill to carry out dispersion grinding the raw material after calcining, produce and become the fine crystalline flour of alpha's aluminium sesquioxide.
Embodiment 3: take produce 500Kg pottery crystalline flour raw material as:
Step 1, get sintering agent 96.1%, magnesium oxide 1.99%, magnesium fluoride 1.91% and mix and make that to suppress production agent stand-by; Step 2, gets industrial utmost point aluminum oxide 500Kg and grind by ball mill, then the screening of classified machine reaches below 1 micron fineness D50, screening leach compared with coarse fodder screening after deliberation again; Step 3, get stand-by inhibition production agent, by step 2 powder weight part 0.5%, after meter 0.5Kg adds, stir; Step 4, by the Raw material processing stirring, be spherical work in-process, adopt tunnel furnace to calcine by 1250 ℃ of temperature; Step 5, adopt ball mill to carry out dispersion grinding the raw material after calcining, produce and become the fine crystalline flour of alpha's aluminium sesquioxide.
Claims (1)
1. add and suppress the method that growth promoter is produced the fine crystalline flour of alpha's aluminium sesquioxide, comprise and adopt tunnel furnace to calcine by 1250 ℃ of temperature, it is characterized in that:
Production method is as follows:
Step 1, get sintering agent 95.24～96.16%, magnesium oxide 1.92～2.86%, magnesium fluoride 1.9～1.92% and mix and make that to suppress production agent stand-by;
Step 2, gets industrial utmost point aluminum oxide and grind by ball mill, then the screening of classified machine reaches below 1 micron fineness D50, screening leach compared with coarse fodder screening after deliberation again;
Step 3, get stand-by inhibition production agent, in step 2 powder weight part 0.03～0.5% ratio, add and stir;
Step 4, by the above-mentioned Raw material processing stirring, be spherical work in-process, adopt tunnel furnace to calcine by 1250 ℃ of temperature;
Step 5, adopt ball mill to carry out dispersion grinding raw material after above-mentioned calcining, produce as the fine crystalline flour of alpha's aluminium sesquioxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310497768.XA CN103553095A (en) | 2013-10-22 | 2013-10-22 | Method for producing alpha-aluminum oxide fine crystal powder by adding growth inhibitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310497768.XA CN103553095A (en) | 2013-10-22 | 2013-10-22 | Method for producing alpha-aluminum oxide fine crystal powder by adding growth inhibitor |
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| CN103553095A true CN103553095A (en) | 2014-02-05 |
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| CN201310497768.XA Pending CN103553095A (en) | 2013-10-22 | 2013-10-22 | Method for producing alpha-aluminum oxide fine crystal powder by adding growth inhibitor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106007683A (en) * | 2015-03-26 | 2016-10-12 | 日本碍子株式会社 | Method for manufacturing alumina sintered body and alumina sintered body |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85102281A (en) * | 1985-04-01 | 1986-09-17 | 郑州轻金属研究所 | The manufacture method of low-sodium 2-alumina of superfine grains |
-
2013
- 2013-10-22 CN CN201310497768.XA patent/CN103553095A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85102281A (en) * | 1985-04-01 | 1986-09-17 | 郑州轻金属研究所 | The manufacture method of low-sodium 2-alumina of superfine grains |
Non-Patent Citations (3)
| Title |
|---|
| 曾燕伟: "《无机材料科学基础》", 31 August 2011, article "影响烧结的因素", pages: 378-379 * |
| 陈玮: "α-Al2O3形成过程显微结构演变及其调控", 《中国博士学位论文全文数据库 工程科技I辑》, no. 11, 15 November 2010 (2010-11-15) * |
| 陈玮等: "MgO掺杂对α-Al2O3显微结构的影响", 《矿冶工程》, vol. 28, no. 5, 31 August 2008 (2008-08-31), pages 107 - 110 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106007683A (en) * | 2015-03-26 | 2016-10-12 | 日本碍子株式会社 | Method for manufacturing alumina sintered body and alumina sintered body |
| CN112759373A (en) * | 2015-03-26 | 2021-05-07 | 日本碍子株式会社 | Method for producing alumina sintered body and alumina sintered body |
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Application publication date: 20140205 |