CN102143617A - Electrothermal material containing titanium nitride and element - Google Patents
Electrothermal material containing titanium nitride and element Download PDFInfo
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- CN102143617A CN102143617A CN2010101034011A CN201010103401A CN102143617A CN 102143617 A CN102143617 A CN 102143617A CN 2010101034011 A CN2010101034011 A CN 2010101034011A CN 201010103401 A CN201010103401 A CN 201010103401A CN 102143617 A CN102143617 A CN 102143617A
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Abstract
The invention relates to a high-temperature electrothermal material which adopts titanium nitride as a main conducting component and adopts high-temperature-resistant oxide and nonoxide as resistance adjusting components. The high-temperature electrothermal material is characterized by comprising the following components in percent by weight: 5-40% of titanium nitride, 30-80% of nonconducting oxide or nitride or mixture of the nonconducting oxide and the nitride and 15-30% of other additives comprising a mixture of metal and oxide thereof and nitride thereof or/and carbide thereof. A special method for isostatic pressing molding and extrusion molding processes of electrothermal elements is provided, as well as a new method for connection of cold sections and hot sections and a new method for bridging of hot sections of U-shaped heating bodies are provided, which are seen in a figure 1 and a figure 2. The high-temperature electrothermal material has the advantages that the resistivity adjusting range of the electrothermal material is large, so that the requirement for a power supply is low; the high temperature resistance is very high, so that the electrothermal material can be used as a heating body of a high-temperature and ultra-high-temperature electrothermal furnace; and the stability for the nitrogen, other gases and vacuum is high under a high temperature, so that the electrothermal material can be used as a heating body of a high-temperature nitriding furnace and/or a vacuum high-temperature furnace.
Description
Technical field:
The present invention relates to the hot industry field, mainly is thermo electric material and the element that is applied to various industrial electroheat stoves and laboratory electrothermal furnace.
Technical background:
Used electric heating element mainly contains carbon materials, molybdenum silicide and tungsten silicide material, carbofrax material, tungsten/molybdenum, nickel chromium triangle, platinum wire on industrial electroheat stove in the past and the laboratory electrothermal furnace, and zirconia etc.Wherein the serviceability temperature of low-temperature alloy silk such as nickel filament is limited, carbon element and tungsten and molybdenum material can only be used in reduction, vacuum and the inert atmosphere, carborundum can only use below 1450 ℃ under oxidizing atmosphere, molybdenum silicide/tungsten silicide material is the highest can to reach 1850 ℃, platinum wire can only use in 1700 ℃, and Wen Houcai had certain conductivity during zirconia need be heated to.In new high-temperature technology, adopting the electrothermal furnace of work under nitrogen and the ammonia atmosphere in a large number, and in the above-mentioned material, general alloy serviceability temperature can not meet the demands, carbon element, tungsten/molybdenum and platinum wire resistance are little, need on control system, to add very big transformation system, increase great amount of investment and cause unproductive energy consumption to increase, on element is made, be difficult to big normalization simultaneously.Tungsten silicide/molybdenum silicide and carbofrax material serviceability temperature under blanket of nitrogen and ammonia atmosphere descends significantly and has the phenomenon of nitrogen seriously corroded, decline to a great extent useful life, the zirconia heater could be worked after needing another set of heater to be warmed up to uniform temperature, and the used heater of heater also faces the corrosion of blanket of nitrogen and is restricted.Therefore, the thermo electric material and the element of searching long-term work under high-temperature ammonolysis atmosphere and other aggressive atmosphere are very urgent.Purpose of the present invention is exactly to solve the thermo electric material of energy long-term work under high temperature nitrogen atmosphere and the manufacture method of goods.
Summary of the invention:
The present invention relates to titanium nitride is main conductive compositions, is the high-temperature electric heat material of resistance adjustment composition with refractory oxide and non-oxidized substance, and other additive is metal and oxide thereof and nitride or/and the mixture of carbide is formed.Isostatic compaction and extruding-out process to its electric heating element have proposed special method, and have proposed the new method of the bridge joint of cold section new method that is connected with hot arc and U-shaped heater hot arc, see attached Fig. 1 and 2.Advantage of the present invention is that the resistivity adjustable range of thermo electric material is big, to power supply require low; High temperature resistant especially, can be used as the heater of high temperature and superhigh temperature electrothermal furnace; At high temperature nitrogen and other gas and vacuum there are very high stability, can be used as the heater of high-temperature ammonolysis stove and/or high-temperature vacuum furnace.
Description of drawings:
Fig. 1 is a kind of new method of attachment of hot arc and cold section.Wherein:
(1)---pin;
(2)---hot arc;
(3)---filler;
(4)---cold section.
Fig. 2 is a kind of chevron bridging method of U-shaped heater.Wherein:
(1)---hot arc;
(2)---the chevron card;
(3)---filler.
Specific embodiments:
With TiN content greater than 98% titanium nitride raw material and Al
2O
3Content is pressed TiN greater than 99% alpha-alumina: Al
2O
3The ratio that is 20: 80 is got material, gets 1-4 part phenol-formaldehyde resin powder again, mixes to be incorporated in the ball mill more than the common fine grinding 10H, adds right amount alcohol, and granulation on the high-speed mixing comminutor is sieved, granulation again after the oversize fragmentation, and fine powder is granulation again directly.Material after the granulation is put into the drying room drying, makes fugitive constituent be lower than 5/1000ths, granulation material vibrations ramming is put into the gum cover external mold carry out hydrostatic pressing, after the shaping, slough combination mold core and gum cover, heat treatment in dry kiln is at temperature 150-300 ℃ of scope inner drying 5-20H.High temperature biscuiting in nitrogen or other non-oxidizing atmosphere has it and bears mach intensity, on lathe with special cutter with component profile machining and shaping in addition.Reenter sintering in the high temperature furnace of non-oxidizing atmosphere, its goods are as the hot arc of element, use simultaneously to make pin with material with the prepared short cylinder and use.Press TiN with homogeneous raw material again: Al
2O
3The ratio that is 40: 60 is got material, adds 5-10 part metal molybdenum powder and 1-4 part phenol-formaldehyde resin powder, mixes mill altogether, repeats aforementioned technical process, and the goods that obtain are as cold section of element.Half of pin inserted at the hot arc two ends, and inserts is filled up in the slit between itself and hot arc element, second half that pin is exposed spread inserts again, pack into pin with cold section, heat treated makes its sclerosis, and sintering in high temperature furnace just obtains equal diameter heater element again, measure its resistance value and by the Standard resistance range key words sorting, class wrapping is sold.For obtaining U-shaped heater element, be connected with cold section with the end of cold section method that is connected by aforementioned hot arc earlier hot arc, the scheme of by specification accompanying drawing 2, couple together with the not link of chevron card two hot arc elements, obtain the U-shaped electric heating element, measure its resistance value and by the Standard resistance range key words sorting, class wrapping is sold.
Claims (9)
1. one kind is main conductive compositions with titanium nitride, with refractory oxide and non-oxidized substance is the high-temperature electric heat material of resistance adjustment composition, it is characterized in that by titanium nitride 5-40%, aluminium oxide or zirconia or calcium oxide or magnesium oxide or boron nitride or silicon nitride or their mixture 30-80%, and other additive is metal and oxide thereof and nitride or/and the mixture 5-30% of carbide forms, under high temperature nitrogen atmosphere and ammonia atmosphere, can use for a long time and be not corroded, can be used for the high-temperature ammonolysis stove.
2. the described high-temperature electric heat material of claim 1, it is characterized in that in preparation, titanium nitride as conductive phase is the pure titanium nitride that directly adds, or adding metallic titanium powder, or add metallic aluminium powder and titanium dioxide in the sintering preparation or thermal reduction nitrogenize in using, and can use the combination of above-mentioned three kinds of modes and obtain finally required conductive phase titanium nitride content.
3. claim 1 and 2 described high-temperature electric heat materials; the composite article that it is characterized in that pure titanium nitride and other material is to be higher than under high temperature nitrogen/ammonia/inert gas shielding of 1700 ℃ to burn till in the electric heating atmosphere furnace; with the composite article of Titanium and other material mixing is to be higher than after the first nitridation reaction biscuiting under 1600 ℃ the high temperature to burn till in the electric heating atmosphere furnace, and the composite material of other form then is to burn till being lower than under electric heating atmosphere furnace the peculiar institution under 1550 ℃ the middle temperature.
4. the described thermo electric material of claim 1, it is characterized in that at heating section and cold section mixture that has used conductive phase to be titanium nitride and metal and other compound, but the contained conductive phase titanium nitride of two parts difference, and cold section contains conductive paste material titanium nitride and the metallic addition that is higher than hot arc, make its cold section resistance little, but do not have very big coefficient of thermal expansion differences again with hot arc.
5. the described thermo electric material of claim 1, it is levied is hot arc and cold period be connected except that common technologies such as welding, also adopted insertion method, promptly in heating section pipe and cold section pipe, do pin with the same material of hot arc, patch in hot arc and cold section the interior pipe that is connected the termination, the two is coupled together, and other metal or the compound of between the interface of two kinds of materials of interface and/or two parts, having filled Titanium, aluminium, tungsten, molybdenum and having mentioned, and sintering in blanket of nitrogen and ammonia atmosphere also can be issued to sintering in blanket of nitrogen or ammonia atmosphere service condition.
6. the described electric heating element of claim 1, the hot junction that it is characterized in that the U-shaped heater connects except that common interconnection technology anyhow, also adopted the method for pier beam type bridge joint, promptly in the pipe of two heating section pipes, make the U-shaped pin that a pier is respectively arranged at the two ends of a crossbeam with the same material of hot arc, pin is inserted in the interior pipe of two heat-generating pipes, the two is coupled together, and between the interface of two parts of interface, filled Titanium, aluminium, tungsten, molybdenum and other metal or the compound mentioned, and sintering in blanket of nitrogen and ammonia atmosphere also can be issued to sintering in blanket of nitrogen or ammonia atmosphere service condition.
7. the described electric heating element of claim 1 is characterized in that small components is a solid hopkinson bar, and big element is generally pipe fitting, and they all are hydrostatic pressings; For tube element, adopt the mould of combination steel core as pipe.
8. the described electric heating element of claim 1 is characterized in that solid straight shape element adopts extrusion molding, the alignment of rolling on the glass plate of tiltedly putting; And tube element and special-shaped element formalize by matched moulds after adopting extrusion molding.
9. the described thermo electric material of claim 1 is characterized in that tube element adopts slurry casting to be shaped, and its solvent is that resin and other organic liquid are formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101034011A CN102143617A (en) | 2010-02-01 | 2010-02-01 | Electrothermal material containing titanium nitride and element |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101034011A CN102143617A (en) | 2010-02-01 | 2010-02-01 | Electrothermal material containing titanium nitride and element |
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| CN102143617A true CN102143617A (en) | 2011-08-03 |
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| CN2010101034011A Pending CN102143617A (en) | 2010-02-01 | 2010-02-01 | Electrothermal material containing titanium nitride and element |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4449039A (en) * | 1981-09-14 | 1984-05-15 | Nippondenso Co., Ltd. | Ceramic heater |
| US4549905A (en) * | 1982-11-17 | 1985-10-29 | Nippondenso Co., Ltd. | Ceramic heater |
| US4613455A (en) * | 1983-09-08 | 1986-09-23 | Nippondenso Co., Ltd. | Ceramic heater and a method for its production |
| CN1209869A (en) * | 1996-01-26 | 1999-03-03 | 圣戈本工业陶瓷股份有限公司 | Noval ceramic ignitor and method of using same |
| CN1650671A (en) * | 2002-04-26 | 2005-08-03 | 日本特殊陶业株式会社 | Ceramic heater and glow plug having the same |
-
2010
- 2010-02-01 CN CN2010101034011A patent/CN102143617A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4449039A (en) * | 1981-09-14 | 1984-05-15 | Nippondenso Co., Ltd. | Ceramic heater |
| US4549905A (en) * | 1982-11-17 | 1985-10-29 | Nippondenso Co., Ltd. | Ceramic heater |
| US4613455A (en) * | 1983-09-08 | 1986-09-23 | Nippondenso Co., Ltd. | Ceramic heater and a method for its production |
| CN1209869A (en) * | 1996-01-26 | 1999-03-03 | 圣戈本工业陶瓷股份有限公司 | Noval ceramic ignitor and method of using same |
| CN1650671A (en) * | 2002-04-26 | 2005-08-03 | 日本特殊陶业株式会社 | Ceramic heater and glow plug having the same |
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Application publication date: 20110803 |