RU2010143227A - METHOD FOR PRODUCING A BATTERY FOR SYNTHESIS OF SILICON NITRIDE - Google Patents
METHOD FOR PRODUCING A BATTERY FOR SYNTHESIS OF SILICON NITRIDE Download PDFInfo
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- RU2010143227A RU2010143227A RU2010143227/05A RU2010143227A RU2010143227A RU 2010143227 A RU2010143227 A RU 2010143227A RU 2010143227/05 A RU2010143227/05 A RU 2010143227/05A RU 2010143227 A RU2010143227 A RU 2010143227A RU 2010143227 A RU2010143227 A RU 2010143227A
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Abstract
Способ получения шихты для синтеза нитрида кремния, включающий смешивание порошков кремния и нитрида кремния как разбавителя, отличающийся тем, что предварительно образуют насыпной слой порошка кремния, затем активируют кремний путем самоизмельчения частиц в высокоскоростной струе сжатого газа, например азота или воздуха, при избыточном давлении не менее 6 кг/см2 в течение не менее 2 рециклов массы загрузки при перемещении его восходящим газовым потоком из насыпного слоя в зону действия центробежных сил, создаваемых ротором центробежного классификатора, рециркулируют порошковый материал путем вывода крупной фракции из зоны действия центробежных сил и возвращения в насыпной слой, осуществляют воздушно-центробежную сепарацию фракции частиц менее 5 мкм, после чего в струе азота активированный кремний смешивают с порошком нитрида кремния, имеющим средний размер частиц - δ50 меньше 1 мкм и шириной функции распределения Span=(δ90-δ10)δ50 не более 2, в количестве 10-25% от общей массы, в течение 7-8 рециклов при избыточном давлении азота не менее 4 кг/см2, где δ50 - размер, меньше которого массовая доля частиц составляет 50% (средний размер частиц), δ10 - размер, меньше которого массовая доля частиц составляет 10%, δ90 - размер, меньше которого массовая доля частиц составляет 90%. A method of producing a mixture for the synthesis of silicon nitride, comprising mixing powders of silicon and silicon nitride as a diluent, characterized in that they preliminarily form a bulk layer of silicon powder, then activate silicon by self-grinding particles in a high-speed jet of compressed gas, such as nitrogen or air, at an overpressure not less than 6 kg / cm2 for at least 2 recycles of the load mass when moving it with an upward gas flow from the bulk layer into the zone of action of centrifugal forces created by the centrifugal rotor classifier, the powder material is recycled by removing a large fraction from the centrifugal force and returning it to the bulk layer, air-centrifugal separation of the particle fraction of less than 5 μm is carried out, after which activated silicon is mixed with a silicon nitride powder having an average particle size of δ50 is less than 1 μm and the width of the distribution function Span = (δ90-δ10) δ50 is not more than 2, in the amount of 10-25% of the total mass, for 7-8 cycles with an excess nitrogen pressure of at least 4 kg / cm2, where δ50 - size less than which mas The total fraction of particles is 50% (average particle size), δ10 is the size less than which the mass fraction of particles is 10%, δ90 is the size less than which the mass fraction of particles is 90%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2010143227/05A RU2465197C2 (en) | 2010-10-21 | 2010-10-21 | Method of obtaining charge material for synthesis of silicon nitride |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2010143227/05A RU2465197C2 (en) | 2010-10-21 | 2010-10-21 | Method of obtaining charge material for synthesis of silicon nitride |
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| Publication Number | Publication Date |
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| RU2010143227A true RU2010143227A (en) | 2012-05-10 |
| RU2465197C2 RU2465197C2 (en) | 2012-10-27 |
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| RU2010143227/05A RU2465197C2 (en) | 2010-10-21 | 2010-10-21 | Method of obtaining charge material for synthesis of silicon nitride |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110294465A (en) * | 2019-05-16 | 2019-10-01 | 宁夏秦氏新材料有限公司 | The preparation method of decanter type self- propagating silicon nitride |
| CN112850665A (en) * | 2021-01-30 | 2021-05-28 | 埃克诺新材料(大连)有限公司 | Preparation method of silicon nitride powder |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2541058C1 (en) * | 2013-10-09 | 2015-02-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Национальный исследовательский Томский государственный университет" (ТГУ) | Method of obtaining ultradisperse silicon nitride powder |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2240860C1 (en) * | 2003-03-13 | 2004-11-27 | Общество с ограниченной ответственностью "Научно-производственное общество "МИПОР" | Method of synthesis of powder-like materials, mainly refractory materials and a device for its realization |
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- 2010-10-21 RU RU2010143227/05A patent/RU2465197C2/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110294465A (en) * | 2019-05-16 | 2019-10-01 | 宁夏秦氏新材料有限公司 | The preparation method of decanter type self- propagating silicon nitride |
| CN112850665A (en) * | 2021-01-30 | 2021-05-28 | 埃克诺新材料(大连)有限公司 | Preparation method of silicon nitride powder |
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| Publication number | Publication date |
|---|---|
| RU2465197C2 (en) | 2012-10-27 |
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| MM4A | The patent is invalid due to non-payment of fees |
Effective date: 20161022 |