CN203396497U - Double layer structure silicon nitride ceramic protective tube - Google Patents
Double layer structure silicon nitride ceramic protective tube Download PDFInfo
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- CN203396497U CN203396497U CN201320161721.1U CN201320161721U CN203396497U CN 203396497 U CN203396497 U CN 203396497U CN 201320161721 U CN201320161721 U CN 201320161721U CN 203396497 U CN203396497 U CN 203396497U
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- silicon nitride
- protective tube
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- gas pressure
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- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The utility model relates to a protective tube for aluminum liquid temperature measurement, in particular to a double layer structure silicon nitride ceramic protective tube. The protective tube comprises an inner layer which is an inner tube made by metal, aluminum oxide, silicon carbide, or reaction sintered silicon nitride materials. The outer side of the inner layer is attached with a gas pressure sintered silicon nitride ceramic outer layer. The protective tube of the utility model is low in cost, high in anti-corrosion strength, and long in service life, and overcomes the defects that conventional metal, aluminum oxide, silicon carbide ceramic, and reaction sintered silicon nitride protective tubes are not resistant to corrosion and are short in service life and that gas pressure sintered silicon nitride protective tubes are high in cost.
Description
Technical field:
The utility model relates to a kind of aluminium liquid thermometric protection tube, particularly a kind of double-decker silicon nitride ceramics protection tube.
Background technology:
The protection tube of various metals and ceramic material is widely used in thermometric protection and the heated protective of molten aluminum liquid.Metal material mainly contains cast carbon steel and stainless-steel tube, and ceramic material mainly contains aluminium oxide, silit and nitrogenize silicone tube.Silicon nitride ceramics is divided into again two kinds of reaction-sintered and gas pressure sinterings.Because production technology is different, reaction sintering silicon nitride density is low, and intensity is low, makes after protection tube equally with silicon carbide ceramics protection tube with metal, aluminium oxide, and not corrosion-resistant, serviceable life is short, but easily moulding can produce in batches, and cost is low.Gas Pressure Sintered Silicon Nitride cost is high, but after making protection tube, density is high, and intensity is large, has superpower prevent corrosion of aluminium melt characteristic.Gas Pressure Sintered Silicon Nitride protection tube is 10～20 times of the material protection tube such as metal, aluminium oxide, silit and reaction sintering silicon nitride serviceable life.
Utility model content:
The technical problems to be solved in the utility model is to provide a kind of double-decker silicon nitride ceramics protection tube, and it is low that this protection tube has been realized cost, and anticorrosive intensity is large, long service life.Overcome the deficiency that existing metal, aluminium oxide, silicon carbide ceramics and reaction sintering silicon nitride protection tube are not corrosion-resistant, serviceable life is short and gas Pressure Sintered Silicon Nitride protection tube cost is high.
Technical solution adopted in the utility model is: a kind of double-decker silicon nitride ceramics protection tube, comprises internal layer; The inner tube of internal layer for adopting metal or aluminium oxide or silit or reaction sintering silicon nitride material to make, in internal layer outside, additional one deck Gas Pressure sintered Silicon Nitride is outer.
The beneficial effects of the utility model are: the utility model is owing to having adopted double-decker, thereby it is low to have cost, and anticorrosive intensity is large, the advantage of long service life.
Accompanying drawing explanation:
Below in conjunction with the drawings and specific embodiments, the utility model is described in more detail.
Fig. 1 is structural representation of the present utility model.
Embodiment:
As shown in Figure 1, a kind of double-decker silicon nitride ceramics protection tube, comprises internal layer 1; The inner tube of internal layer 1 for adopting metal or aluminium oxide or silit or reaction sintering silicon nitride material to make; the additional very thin Gas Pressure sintered Silicon Nitride skin 2 of a layer thickness in internal layer 1 outside; can take to glued joint; or gas pressure sintering after spraying; or the mode such as gas pressure sintering again after cold isostatic compaction, finally make double-decker silicon nitride protection tube.
Be understandable that, above about specific descriptions of the present utility model, only for being described, the utility model is not limited to the described technical scheme of the utility model embodiment, those of ordinary skill in the art is to be understood that, still can modify or be equal to replacement the utility model, to reach identical technique effect; As long as meet, use needs, all within protection domain of the present utility model.
Claims (1)
1. a double-decker silicon nitride ceramics protection tube, comprises internal layer (1); It is characterized in that: the inner tube of internal layer (1) for adopting metal or aluminium oxide or silit or reaction sintering silicon nitride material to make, in the additional one deck Gas Pressure sintered Silicon Nitride in internal layer (1) outside outer (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320161721.1U CN203396497U (en) | 2013-04-03 | 2013-04-03 | Double layer structure silicon nitride ceramic protective tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320161721.1U CN203396497U (en) | 2013-04-03 | 2013-04-03 | Double layer structure silicon nitride ceramic protective tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203396497U true CN203396497U (en) | 2014-01-15 |
Family
ID=49908021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320161721.1U Expired - Fee Related CN203396497U (en) | 2013-04-03 | 2013-04-03 | Double layer structure silicon nitride ceramic protective tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203396497U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105924179A (en) * | 2016-04-14 | 2016-09-07 | 北京中材人工晶体研究院有限公司 | Silicon nitride ceramic heater protection tube, preparation method and applications thereof |
| CN106045343A (en) * | 2016-06-07 | 2016-10-26 | 广东韶钢松山股份有限公司 | Protection tube of thermocouple for parallel-flow heat storage type double-chamber lime shaft kiln |
| CN106793192A (en) * | 2016-12-14 | 2017-05-31 | 宜兴市华井科技有限公司 | A kind of heater protecting pipe |
-
2013
- 2013-04-03 CN CN201320161721.1U patent/CN203396497U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105924179A (en) * | 2016-04-14 | 2016-09-07 | 北京中材人工晶体研究院有限公司 | Silicon nitride ceramic heater protection tube, preparation method and applications thereof |
| CN106045343A (en) * | 2016-06-07 | 2016-10-26 | 广东韶钢松山股份有限公司 | Protection tube of thermocouple for parallel-flow heat storage type double-chamber lime shaft kiln |
| CN106793192A (en) * | 2016-12-14 | 2017-05-31 | 宜兴市华井科技有限公司 | A kind of heater protecting pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140115 Termination date: 20170403 |