CuAlO2陶瓷靶材的制备及其性能研究

以分析纯微米级Al2O3和Cu2O粉体为原料,采用固相烧结法制备铜铁矿型透明导电氧化物CuAlO2陶瓷靶材,通过XRD、R-T和SEM等测试方法对其进行结构和性能表征,研究烧结反应温度及时间对靶材结构、密度、电导率的影响.结果表明:最佳烧结制备CuAlO2陶瓷靶材的试验条件为烧结温度1150℃、烧结时间10h.试验获得...     

烧结温度对AZO热压靶材性能影响研究

以ZnO和Al2O3粉体为原料,采用热压烧结制备AZO靶材.通过阿基米德法测量靶材的密度,压汞法测量靶材的孔径分布,扫描电镜观察靶材的断面形貌,研究了热压温度对AZO靶材密度、气孔演化和显微结构的影响.结果表明:根据烧结温度的不同,AZO靶材热压致密化过程分为两个阶段:850～1050℃,随着温度的升高,连通气孔发生合并与收缩,孔径分布逐渐集中化,同时闭孔率逐渐减小,在1050℃具有最低值0.104％.这一阶段的主要特征是致密化速率较快,存在相互连通的气孔.当温度升至1150℃,颗粒之间结合紧密,孔隙率降至5.21％.这一阶段的主要特征是气孔全部闭合.将所制备的靶材作为溅射源,进行射频磁控镀膜测试.采用台阶仪测量膜厚,紫外分光光度计测量薄膜透光率,四探针电阻图谱仪测量薄膜电阻率,XRD分析物相的结构.镀膜测试结果显示,在相同的溅射条件下,靶材孔隙率越低,沉积速率越快,所得薄膜电阻率越低,但溅射功率较高时薄膜透光率明显减小.平均孔径较小且孔径分布集中的靶材,溅射所得薄膜电阻率较低.在溅射功率密度为3.9 W·cm-2下,相对密度高于80％的AZO靶材,靶材寿命大于150 W·h.相对密度为94.79％的靶材在溅射功率30W下沉积20 min得到薄膜的电阻率为3.14×10-4Ω·cm,平均透过率大于85％,具有002择优取向,满足薄膜太阳能对透明导电薄膜性能的要求.     

工艺条件对直流磁控溅射沉积ITO薄膜光电特性的影响

研究了采用直流磁控溅射法制备ITO透明导电膜时温度、靶材、氧压比、溅射气压、溅射速率等工艺条件对ITO膜电阻率和可见光透过率等光电特性的影响。实验结果表明,用ITO陶瓷靶溅射镀膜要比In-Sn合金靶好,特别是在电阻率上,前者要低一个数量级左右;并由实验结果得到,当温度330℃,氧氩比1/40,溅射气压0.45 Pa和溅射速率23 nm.min-1左右时,可获得薄膜电阻率1.8×10-4Ω.cm,可见光透过率80%以上的最佳光电特性参数。     

Ca3Co2O6块体的放电等离子烧结及热电性能研究

采用短时固相反应和放电等离子烧结(SR-SPS)方法, 制备了单相多晶Ca3Co2O6陶瓷块, 系统研究了制备条件及烧结工艺对Ca3Co2O6陶瓷块显微结构及热电性能的影响. 研究表明, 950 ℃下固相反应2 h即能得到单相树枝状, 尺寸约1～3 μm的Ca3Co2O6粉末, 延长焙烧时间虽然对物相影响不大, 但会引起粉末颗粒长大, 不利于SPS烧结;SPS烧结温度强烈影响着Ca3Co2O6陶瓷块的制备, 本实验范围内, Ca3Co2O6陶瓷块体的最佳制备条件为950 ℃固相反应2 h, SPS 900 ℃保温5 min, 此时Ca3Co2O6陶瓷块具有p型半导体特性, 电阻率ρ随温度的升高急剧下降, 然后趋于平缓(高于600 ℃);Seebeck系数S随温度(100 ℃以上)升高稍有下降, 热导率κ表现为先下降后增加, 在500 ℃时仅为1.73 W·m-1·K-1. 综合电性能与热性能结果, 其无量纲因子ZT随温度升高呈上升趋势, 在本实验范围内, 于700 ℃下达到最高值0.02.     

淀积温度和氧含量对ITO膜结构及性能的影响

在玻璃衬底上用直流磁控溅射的方法镀制ITO透明半导体膜 ,采用X射线衍射技术分析了膜层晶体结构与温度和氧含量的关系 ,并测量分析了薄膜电阻率及透光率分别随温度和氧含量的变化情况。所镀制的ITO膜电阻率已降到 <2× 10 - 4Ω·cm ,可见光透过率达 80 %以上。     

包裹型ZrB_2-YAG-Al_2O_3复相陶瓷的制备及氧化性能研究

ZrB2具有许多优异性能,应用非常广泛。采用共沉淀法成功合成包裹型A1(OH)3-Y(OH)3/ZrB2复合粉体,再通过600℃煅烧得到了包裹型Al2O3-Y2O3/ZrB2复合粉体。包裹型Al2O3-Y2O3-ZrB2粉体在1 700℃、20MPa、4min的放电等离子烧结(SPS)条件下烧结致密化制备包裹型ZrB2-YAG-Al2 O3陶瓷。复相陶瓷的氧化增重随着氧化温度升高而增大,随着YAG-Al2O3含量增大而减小。     

非晶半导体薄膜用Te系化合物靶材制备

采用真空熔炼法, 经急冷和缓冷两种不同冷却条件制备了Te系化合物TeAsGeSi合金粉体.通过X射线衍射分析, 急冷工艺制备粉体呈非晶态, 缓冷工艺制备的粉体呈晶态, 结晶主相为R-3m空间群的As₂GeTe₄; 差热-热重分析显示, 升温至350℃时缓冷粉体As₂GeTe₄成分熔融, 400℃时两种粉体均开始快速失重, 为避免制备过程中发生材料熔融及挥发损失, 确定烧结温度不超过340℃.采用真空热压法制备TeAsGeSi合金靶材, 将两种粉体分别升温至340℃, 加压20 MPa, 保温2 h制备出两种靶材, 其中缓冷粉体制备的靶材致密度高, 为5. 46 g·cm-3, 达混合理论密度的99. 5%, 形貌表征显示此靶材表面平整, 孔洞少, 元素分布均匀.      

靶材热处理温度对磁控溅射Mo薄膜组织和性能的影响

采用磁控溅射设备和经过不同温度热处理的Mo靶材,以相同的溅射工艺参数,在Si基片上制备了Mo金属薄膜,研究了靶材的热处理温度对Mo薄膜组织和性能的影响。研究结果发现,所制备Mo薄膜均呈现（110）晶面择优取向,而靶材热处理温度的升高能够提高（110）晶面的择优取向程度。所有薄膜均为T型低温抑制生长。比较结果表明：经1 200℃热处理的Mo靶材溅射率最高（18.5 nm/min）,且其溅射膜具有较小的方阻值和较好的厚度均匀性,综合性能最优。     

机械活化-放电等离子烧结制备Y3Al5O12陶瓷

以高纯Y2O3和Al2O3粉体为原料,通过机械活化和放电等离子烧结制备Y3Al5O12(YAG)陶瓷.研究结果表明:机械活化Y2O3和Al2O3粉体,不但细化了Al2O3颗粒,而且使Y2O3发生了晶态转变,由立方晶转变为斜方晶,并最终非晶化;机械活化过程最终还合成了过渡产物YAlO3(YAP),但球磨5h后,继续延长球磨时间,会引入大量ZrO2杂质;球磨处理的Y2O3和Al2O3粉体具有很高的活性,能促进在较低温度下通过放电等离子烧结合成YAG.对球磨5h的粉体在不同温度进行放电等离子烧结的研究表明,在1000℃可获得纯YAG陶瓷,在1 400℃可得到相对密度为99.4%、晶粒大小为1～2μm的YAG陶瓷.     

Cu(In,Ga)Se_2太阳能电池窗口层ZnO∶Al薄膜的研究

用射频磁控溅射氧化锌掺铝陶瓷靶的方法在玻璃衬底上制备了ZnO∶Al薄膜。研究了衬底温度(Ts)、靶基距(Dt-s)对薄膜结构及光电性能的影响。实验结果显示:Ts在室温至300℃、Dt-s在35~60 mm范围内时,薄膜为六方相结构,并具有C轴取向,可见光范围平均透光率大于88%。Ts及Dt-s对薄膜电学性能的影响相似,随Ts升高或Dt-s增大,ZnO∶Al薄膜的电阻率先减小后增大,霍尔迁移率先增大后减小,载流子浓度逐渐减小。在Ts为150℃,Dt-s为40 mm时,可获得最低电阻率4.18×10-4Ω.cm的ZnO∶Al薄膜,其载流子浓度为8.13×1020cm-3、霍尔迁移率为18 cm2.V-.1s-1,可见光范围平均透过率为89%。     

Chinalco Signed Framework Agreement for Strategic Cooperation with Harbin Municipal Government

正Last month,Chinalco signed framework agreement for strategic cooperation with Harbin Municipal Government in Harbin Xiong Weiping,Chairman of Chinalco,said that based on the strategic deployment to build world top-class mining company with the highest growth potential,Chinalco was now concentrating all efforts on making strategic transition and structural adjustment,strategic cooperation with the local governments where     

Jiangxi Promotes Jiangxi Copper Corporation To Become The World's Most Competitive Mining Company

<正>According to the latest info from Jiangxi Province State-owned Assets Supervision and Administration Commission,Jiangxi Copper Corporation was approved to become the first pilot enterprise for deepening reform.Contents of the pilot work is"Three Self"(self expansion,self decision-making,self     

Journal of Rare Earths Contents List of Vol.32(2014)

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Contributions to Baosteel Technical Research wanted

正Baosteel Technical Research,a quarterly journal,which is issued domestically and abroad,is run and sponsored by Baosteel Group Corporation.Baosteel Technical Research mainly reports the achievements in technological innovation,academic research,new product development and industrial equipment improvement by Baosteel.It will continue to follow up on hot topics and serve the company’s technological development and progress.Its readers include experts in     

Ministry of Industry and Information Technology: No Short Term Solution For Our Country’s Excess Nonferrous Metal Smelting Capacity

【正】According to the Ministry of Industry and Information Technology,the Ministry has released the 2013 Operation Report on China’s Industrial Communication Indu...     

Chinalco Signed Framework Agreement for Strategic Cooperation with Gansu Province

正Recently,Chinalco and Gansu Provincial People’s Government signed"Framework Agreement for Strategic Cooperation on Reform,Restructuring and Transition Development of Chinalco’s Electrolytic Aluminum Enterprises in Gansu",signifying that the strategic cooperation between Chinalco and Gansu Province had made new substantive progress.     

Unavoidable Economic Cycle:30% Of Nonferrous Metal Companies Were Involved In Restructuring

正Owing to continual downturn in real estate and bulk commodity markets,a number of traditional industries in China suffered unfavorable impact in performance.With the progressive disclosure of third quarter report,the no-pleasant-surprise performance of     

Baotou Rare Earth Became the World's Biggest High Performance Magnetic Material Base

正The High Performance Magnetic Material Phase II Project,an industry upgrading project implemented by Inner Mongolia Baotou IronSteel Rare Earth(Group)Hi-tech Co.,Ltd,recently basically finished equipment commissioning,signifying that the enterprise had developed the production capacity of15000 t/a Nd-Fe-B strip casting alloy and 5000t/a Nd-Fe-B magnet,thus becoming the world’s     

Introducing Two Central Enterprises to Integrate Rare Earth Industry,Shandong Rare Earth Group Breaks Surface

正With the signing of"Letter of intention for Propelling Integration of Shandong Rare Earth Enterprises"between Shandong Province Commission Of Economy and Informatization,China IronSteel Research Institute Group("China Steel Institute"),and China Rare MetalsRare Earth Co.,Ltd("China Rare Earth"),the"Shandong Rare Earth Group"jointly set up by the 3 units thus broke surface.On August 9,reporters of the China Economic Herald learned from Shandong Province     

Aluminium Production by Province or City in 2014

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