鎂熱還原法制備超細(xì)無(wú)定形硼粉

1、1、鎂熱還原法制備超細(xì)無(wú)定形硼粉及粗硼粉的提純2、關(guān)鍵技術(shù)以一定要求的金屬M(fèi)g粉和B2O3粉為原料，以一定的物料配比和升溫制度條件下，在臥式還原爐中進(jìn)行還原，得到還原產(chǎn)物后，采用鹽酸進(jìn)行徹底的酸洗，可制備出純度在9095%的無(wú)定形硼粉。以鎂熱還原法制備的粗硼粉（8592%）為原料，在粗硼粉中配入一定量的B2O3粉末，經(jīng)充分混合后壓制成塊，裝入不銹鋼坩堝并置于臥式氣氛爐中，溫度維持在7001000，爐內(nèi)通入氬氣作為保護(hù)氣體，經(jīng)過(guò)24h后冷卻，將其置于配置好的稀鹽酸中除去物料中的可溶物，經(jīng)過(guò)濾、烘干即得到純度為9597%的硼粉，其中雜質(zhì)Mg、O、Si、Fe含量分別在1.5%、2%、1.0%、0.5

2、%以下。3、與成果最相關(guān)的圖片 圖1 制備的無(wú)定形硼粉和掃描電鏡SEM圖表1 無(wú)定形硼粉物理化學(xué)性能指標(biāo)物理化學(xué)性能粒度/m比表面積/m2·g元素含量/%BMgOSiFe其他數(shù)值<1.08109597<1.5<2<1<0.5<0.54、社會(huì)和經(jīng)濟(jì)效益無(wú)定形硼粉是一種高附加值的硼化工產(chǎn)品，9295%的無(wú)定形硼粉市場(chǎng)價(jià)格在50008000元/kg，而純度達(dá)到9597%的無(wú)定形硼粉價(jià)格超過(guò)10000元/kg。該科研成果的應(yīng)用將為硼化工企業(yè)產(chǎn)生豐厚的經(jīng)濟(jì)效益和社會(huì)效益。5、應(yīng)用情況該科研成果已經(jīng)在河北省唐山市某企業(yè)得到應(yīng)用。6、知識(shí)產(chǎn)權(quán)該科研成果發(fā)表學(xué)術(shù)論

3、文6篇，其中SCI收錄1篇，EI收錄4篇，ISTP收錄1篇；申請(qǐng)專(zhuān)利1項(xiàng)（專(zhuān)利申請(qǐng)?zhí)枺?01010130202）。1. Preparation of Ultra-fine Amorphous Boron Powder and Purification of Crude Boron by Magnesium Thermal Reduction2. IntroductionAmorphous boron powder that the purity is 9095% was prepared via heating at a certain ratio of Mg and B2O3 powder

4、in furnace and then washing the product with chlorhydric acid.Mixture of crude boron (8592% prepared by magnesium thermal reduction and a certain amounts of B2O3 powder was pressed into a block and heated at 7001000 °C for 24 h under an Ar atmosphere. On cooling to room temperature, the product

5、 was washed with chlorhydric acid, filtered and dried. Boron powder, purity of 9597%, was obtained, in which the impurities of Mg, O, Si and Fe are less than 1.5%, 2%, 1.0% and 0.5%, respectively. 3. Figure Fig. 1 Amorphous boron powder and its SEMTable 1. Physical and chemical performance of amorph

6、ous boron powderPropertiesParticle size/mBet/m2·gElement level/%BMgOSiFeOthersValues<1.08109597<1.5<2<1<0.5<0.54. BenefitsAmorphous boron powder is a high addtional value chemical product, 9295% purity is 50008000 RMB/kg and 9597% purity more than 10000 yuan/kg. The application of this study will bring rich economic and social benefits to boron chemical companies.5. ApplicationThis study has been used in a company of Tangshan City, Hebei Province.6. Pa