CN107399973A - 一种直接氮化法制备氮化铝粉末的工艺 - Google Patents
一种直接氮化法制备氮化铝粉末的工艺 Download PDFInfo
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- 239000000843 powder Substances 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 37
- 229910017083 AlN Inorganic materials 0.000 title claims abstract description 29
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 238000000498 ball milling Methods 0.000 claims abstract description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000000654 additive Substances 0.000 claims abstract description 7
- 230000000996 additive effect Effects 0.000 claims abstract description 7
- 239000003085 diluting agent Substances 0.000 claims abstract description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 150000001875 compounds Chemical class 0.000 claims abstract description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 4
- 238000005245 sintering Methods 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims abstract description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- LDDQLRUQCUTJBB-UHFFFAOYSA-N ammonium fluoride Chemical compound [NH4+].[F-] LDDQLRUQCUTJBB-UHFFFAOYSA-N 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000011225 non-oxide ceramic Substances 0.000 abstract description 2
- 229910052575 non-oxide ceramic Inorganic materials 0.000 abstract description 2
- 238000001035 drying Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- 238000010792 warming Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 239000010431 corundum Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 239000011268 mixed slurry Substances 0.000 description 2
- 239000012299 nitrogen atmosphere Substances 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- FRWYFWZENXDZMU-UHFFFAOYSA-N 2-iodoquinoline Chemical class C1=CC=CC2=NC(I)=CC=C21 FRWYFWZENXDZMU-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 206010013786 Dry skin Diseases 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- LTPBRCUWZOMYOC-UHFFFAOYSA-N beryllium oxide Chemical class O=[Be] LTPBRCUWZOMYOC-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical class O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 229910052984 zinc sulfide Inorganic materials 0.000 description 1
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- C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
- C04B35/581—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on aluminium nitride
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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Abstract
一种直接氮化法制备氮化铝粉末的工艺,属于非氧化物陶瓷粉体材料的制备技术领域。具体步骤为:1、将高纯Al粉、添加剂、稀释剂按一定的配比称重后,与无水乙醇一起放入球磨罐中,球磨3~20h。2、将球磨后的混合料在50~80℃环境中烘干。3、将原料置于坩埚内,放入烧结炉中,在温度800~1200℃下与高纯氮气进行氮化反应。4、氮化反应结束后对粉体进行热处理来改善形貌。该工艺获得的氮化铝粉体颜色均匀、结晶良好、形貌良好、转化率高,适于工业化生产。
Description
技术领域
本发明属于非氧化物陶瓷粉体材料的制备技术领域,具体涉及一种直接氮化法制备氮化铝粉末的工艺技术。
背景技术
氮化铝是一种六方纤锌矿结构的共价键化合物,属于六方晶系,在常压下分解温度为2480℃。氮化铝特殊的晶格结构使其具有高导热率、低热膨胀系数、机械强度高、绝缘性能优良、耐高温、耐腐蚀、介电损耗小、无毒等诸多优异的性能。随着微电子技术的迅速发展,微电子产品向着高度集成化、布线微型化等方向发展,这对电子集成电路基板、散热元件、电子封装材料等的散热问题要求越来越高。氮化铝由于自身的优异性能,已经替代氧化铝和氧化铍而成为目前超大规模集成电路基板的首选材料。也是熔铸纯铁、铝、铜、银、铅等金属熔炼的坩埚和浇铸模具的理想材料。
目前工业上制备氮化铝粉体的方法主要有铝粉直接氮化法、碳热还原法、自蔓延高温合成法。碳热还原法得到的氮化铝粉末接近于球状,但其粒径一般较大,为亚微米左右。后期的除碳过程可能会增加氧杂质含量,这对后期陶瓷的导热率是不利的。另外,此法合成温度高(1600~1800℃),制备氮化铝粉体的成本较高。自蔓延合成技术是利用反应热来维持反应自发地进行,虽然反应速度快、能耗低、工艺简单、周期短,但是反应速度过快、燃烧温度过高以及存在温度梯度过大等问题使过程难易控制。而铝粉直接氮化法反应温度低(800~1200℃)、原料成本低、工艺简单、过程易控制,适于工业化生产。本文采用直接氮化法来获得结晶良好、形貌良好的氮化铝粉体。
发明内容
本发明提供一种直接氮化法制备氮化铝粉末的工艺技术,该工艺获得的氮化铝粉体颜色均匀、结晶良好、形貌良好、转化率高,适于工业化生产。本发明所采用的技术方案是:
(1)将高纯Al粉、添加剂、稀释剂按一定的配比称重后,与无水乙醇一起放入球磨罐中,球磨3~20h;
(2)将球磨后的混合料在50~80℃环境中烘干;
(3)将原料置于坩埚内,放入烧结炉中,在温度800~1200℃下与高纯氮气进行氮化反应;
(4)氮化反应结束后对粉体进行热处理来改善形貌。
步骤(1)中所述高纯Al粉的粒径不大于30μm,高纯Al粉与添加剂的质量比为1:(0.1~0.9),稀释剂占Al粉的0~70wt%。
步骤(1)中所述添加剂为NH4Cl、NH4F中的一种与KCl的混合物,稀释剂为AlN粉末,其中KCl与NH4Cl(或NH4F)的质量比为1:(2~15)。
步骤(4)中所述热处理温度为1400~1650℃,保温时间为1~5h。
本发明的制备方法得到的氮化铝粉体结晶良好、形貌良好,原料成本较低、生产周期短,适于工业化生产。在电子封装材料、集成电路基板、坩埚模具材料等应用方面发挥着重要的作用。
附图说明
图1是采用本发明的工艺制备得到的氮化铝粉体的XRD图。
图2是采用本发明的工艺制备得到的氮化铝粉体的SEM图。
具体实施方式
以下结合实施案例对本发明做进一步的说明,但不仅仅局限于实施例。
实施例
1
将高纯Al粉、NH4Cl、KCl分别100g、41.5g、8.5g放入球磨罐中,加入无水乙醇球磨5h。将混合浆料在干燥箱中60℃烘干后放入刚玉坩埚中,在850℃保温2h后升温至1450℃热处理3h。冷却后得到氮化铝疏松块体,碾磨得到氮化铝粉体。升温-保温-热处理整个过程始终保证氮气气氛,氮化反应前适当进行气体置换,以保证生成的氨气等不影响氮气的纯度。
实施例
2
将高纯Al粉、NH4Cl、KCl按100g、22g、3g的质量进行称量,再加入AlN粉末25g。在球磨罐中球磨6h,球磨介质为无水乙醇。70℃干燥后置于坩埚中,在多功能烧结炉中升温至950℃保温1h,随即缓慢升温至1600℃保温2h,制备得到形貌、结晶良好的氮化铝粉体。整个过程始终为氮气气氛。
实施例
3
将高纯Al粉、NH4F、KCl按100g、54g、6g放入球磨罐中,加入无水乙醇球磨10h。将混合浆料在干燥箱中烘干后放入刚玉坩埚中,在1000℃保温2h后升温至1500℃热处理1h。随炉冷却并碾磨得到氮化铝粉体。
Claims (5)
1.一种直接氮化法制备氮化铝粉末的工艺,其特征在于,包括以下步骤:
(1)将高纯Al粉、添加剂、稀释剂按一定的配比称重后,与无水乙醇一起放入球磨罐中,球磨3~20h;
(2)将球磨后的混合料在50~80℃环境中烘干;
(3)将原料置于坩埚内,放入烧结炉中,在温度800~1200℃下与高纯氮气进行氮化反应;
(4)氮化反应结束后对粉体进行热处理来改善形貌。
2.按照权利要求1所述的一种直接氮化法制备氮化铝粉末的工艺,其特征在于,步骤(1)中所述高纯Al粉的粒径不大于30μm,高纯Al粉与添加剂的质量比为1:(0.1~0.9),稀释剂占Al粉的0~70wt%。
3.按照权利要求1所述的一种直接氮化法制备氮化铝粉末的工艺,其特征在于,步骤(1)中所述添加剂为NH4Cl、NH4F中的一种与KCl的混合物,稀释剂为AlN粉末。
4.按照权利要求3所述的一种直接氮化法制备氮化铝粉末的工艺,其特征在于,所述的KCl与NH4Cl(或NH4F)的质量比为1:(2~15)。
5.按照权利要求1所述的一种直接氮化法制备氮化铝粉末的工艺,其特征在于,步骤(4)中所述热处理温度为1400~1650℃,保温时间为1~5h。
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN107698264A (zh) * | 2016-08-09 | 2018-02-16 | 河北高富氮化硅材料有限公司 | 一种改性高α相氮化硅粉体的制备方法 |
CN110577198A (zh) * | 2018-06-11 | 2019-12-17 | 河北高富氮化硅材料有限公司 | 一种去除氮化铝粉体中碎小颗粒的方法 |
CN115010100A (zh) * | 2022-06-21 | 2022-09-06 | 西安交通大学 | 一种片状氮化铝粉体及其制备方法 |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107698264A (zh) * | 2016-08-09 | 2018-02-16 | 河北高富氮化硅材料有限公司 | 一种改性高α相氮化硅粉体的制备方法 |
CN110577198A (zh) * | 2018-06-11 | 2019-12-17 | 河北高富氮化硅材料有限公司 | 一种去除氮化铝粉体中碎小颗粒的方法 |
CN115010100A (zh) * | 2022-06-21 | 2022-09-06 | 西安交通大学 | 一种片状氮化铝粉体及其制备方法 |
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