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| 1 | Kinetics of Oxidation for β-Sialon in Diphase β-Sialon/Al_2O_3 Composite显示文摘Non-isothermal kinetic research has been carried out on oxidation behavior of β-Sialon in diphaseβ-Sialon/Al2O3 composite at high temperatures. A kinetic formula is established for non-isothermal oxidation process of β-Sialon. The rate of oxidation process is controlled by chemicalreaction at the initial stage and then by diffusion. The apparent activation energies and appar-ent rate constants at different temperatures are determined by treating TG data of the overallprocess. | Youfen LI Yanruo HONG XangChong ZHONG and Tingshou LI(National Laboratory on Solid Electrolytes and Metallurgical Testing Techniques, University of Science & TechnologyBeijing, Beijing 100083, China) | 1999 | Journal of Materials Science & Technology1999，15，1： | 5 |
| 2 | Slag-Resistance of MgAlON Spinel显示文摘The slag-resistance and microstructural changes after the slag tests of MgAlON spinel containing different amount of nitrogenwere studied by means of crucible slag-resistant experiment, SEM and EDS in the work. The results show that the slag-resistance ofMgAlON is dependent on the nitrogen content, and the optimum amount is 2.88%. The strUcture is not changed although the grains havebeen permeated by some silicon, calcium and iron. A glass phase which contained nitrogen formed in the metaInorphic layeL The glasscan driprove the ability of the slag-resistance of MgAlON because of its higher viscosity. | Chengji Deng Yanruo Hong Xiangchong Zhong Jialin Sun(State Laboratory on Solid Electrolytes and Metallurgical Testing Techniques, University of Science and Technology Beijing, Bejing100083, China) | 2000 | International Journal of Minerals,Metallurgy and Materials2000，14，2： | 4 |
| 3 | Slag-resistance of MgAlON spinel显示文摘 | Deng Chengji Hong Yanruo Zhong Xiangchong | 2000 | J University of Science and Technology Bening:English Ed2000，7，2： | 1 |
| 4 | Slag-resistance of MgAION spinel 显示文摘 | Deng Chengji Hong Yanruo Zhong Xiangchong | 2000 | Journal of University of Science and Technology Beijing2000，，2： | 1 |
| 5 | Slag-resistance of MgAlON spinel显示文摘 | Deng Chengji Hong Yanruo Zhong Xiangchong | 2000 | Journal of University of Science and Technology Beijing2000，7，2： | 1 |
| 6 | Progress of Solid Electrolytes and the Electrochemical Sensors显示文摘Four types of solid state electrochemical sensors and their general principles are introduced in the paper. The novel type-IV sensors developed in the last few years are emphasized to study hereafter. The ways to design new electrochemical sensors and the directions to develop new solid electrolytes for new electrochemical sensors are also discussed. | Yanruo HONG(National Lab. on Solid Electrolytes and Metallurgical Testing Techniques, University of Science and Technology Beijing,Beijing 100083, China) | 1997 | Journal of Materials Science & Technology1997，13，3： | 1 |
| 7 | Preparation and characterization of calcium aluminate by chemical synthesis显示文摘Saturated Ca(OH)_2 and AlCl_3 solutions were used to synthesize calcium aluminate hydrate precipitates at room temperature; high purity calcium aluminate powders with stable phases were made by calcination of the precursors at a temperature as low as 1100℃. PSD and BET analysis revealed the particles with sizes ranging from submicrometer to several micrometers and with a specific area of 13 nr/g. The measurement of hydraulic exotherm revealed that the exothermal rate is in peak for about 2 h. The exothermal quantities are 449.24 J/g at 12 h and 488.38 J/g at 24 h. Its strength development is quick and the 1 day curing strength is almost equal to 100% of the 3 days curing strength in the mortar test. | Feng Chen Yanruo Hong Jialin Sun Jinglong Bu | 2006 | Journal of University of Science and Technology Beijing2006，13，1： | 1 |
| 8 | Kinetics of MgAlON Oxidation 显示文摘 | Chengji Deng Yanruo Hong Xiangchong Zhong | 2000 | Trans Nonferrous Metal Soc China2000，21，10： | 1 |
| 9 | Research on Hot Gunning Repairing in Laboratory显示文摘The lining of blast furnace may be damaged partly,so that gunning repair is needed. The bonding strength of boundary surface between the repairing layer and remained lining of blast furnace has been studied by thermal simulation.The factors influencing the bonding strength are the ingredient gunning repair temperature,remained lining condition and water content of gunning refractory.The bonding strength decreases with the increases of remained lining temperature. | CAO Feng, LONG Shigang, MENG Qingmin, SUN Jialin and HONG Yanruo(1 Institute of Metallurgy and Materials, Anhui University of Technology, Ma’ anshan, China) (2 Institute of Metallurgy, University of Science and Technology Beijing, Beijing 100083, China) | 2003 | China's Refractories2003，12，1： | 1 |
| 10 | Sintering Behavior and Microstructure of diphasic β-Sialon /Al_2O_3 Composites显示文摘Six compositions with different ratio of β-Sialon/Al2O3 were synthesized from Al2O3, Si3,N4 and SiO2 by sintering with 3%Y2O3(mass fraction) as addition under the cover with powders of SiC+C and at nitrogen atmosphere. Theeffects of atmosphere, sintering temperature and composition on the sintering behavior were studied. The results showedthat the composites reached the best sintering behavior with the highest density about 92% at 1 650℃ under the weakreduction atmosphere. Finally the relative density of diphasic β-Sialon and p-Sialon/Al2O3 composites were studied andpredicted using ANN (Artificial Neural Networks) method and the results were experimental examined by fore randomsamples. | LI Youfen HONG Yanruo ZHONG Xiangchong LI Tingshou(National laboratory on Solid Electrolytes and Metallurgical Testing Techniques, USTB, Beijing 100083, China) | 1997 | International Journal of Minerals,Metallurgy and Materials1997，11，4： | 0 |
| 11 | Synthesis and Properties of Laβ-Al_2O_3显示文摘Laβ-Al2O3 solid electrolytes were synthesized directly and their conductivities were measured in terms of ac impedance spectroscopy.The magnitude of conductivities is 10-6 to 10-2 S·cm-1.Based on these data, the dependence of the conductivity of Laβ-Al2O3 upon the temperature and the dopant concentration in the electrolytes was studied, and the activation energy for conduction was calculated, which is 0.89 eV to 1.02 eV from 450℃ to 1000℃. The ion transference numbers were also determined. | Congjin JIN Yanruo HONG (State Support Lab. on Solid Electrolytes and Testing Techniques, University of Science & Technology Beijing,Beijing 100083, China) | 1997 | Journal of Materials Science & Technology1997，13，2： | 0 |
| 12 | Current Efficiency of Low Temperature Aluminum Electrolysis Studied by Neural Network显示文摘LowTemperatUreAluminumElectrolysis(LATE)isgenerallyacceptedtobeadevelopmenttendencyofaluminUmProductionduetOitspotentialofhighCurredEfficiency(CE),lowenergyconsUInption,longcelllifeandeasieradoptionofinertmaterialsforelectrodesandcelllining.BecauseCE... | Huimin Lu Zuxian Qiu Keming Fang Fuming Wang Yanruo Hong( Metallurgy School, University of Science and Technology Beijing, Beijing 100083, China)( Department of Nonferrous Metallurgy, Northeastern University, Shenyang 110006, China) | 1999 | International Journal of Minerals,Metallurgy and Materials1999，13，2： | 0 |
| 13 | Thermodynamic Properties of Non-Oxide Composite Refractories显示文摘For initiative application of non-oxides in refractories, it is essential to study thermodynamic properties of non-oxides. The stability and stable order of non-oxides under oxidized atmosphere are analyzed firstly and then a new process, “converse reaction sintering”, is proposed. The results of study on oxidation mechanism of silicon and aluminum nitrides indicate that the gaseous suboxides can be produced observably when the oxygen partial pressure is lower than “conversion oxygen partial pressure”. The suboxides can be deposited near the surface of composite to become a compact layer. This causes the material possessing a performance of “self-impedient oxidation”. Metal Si and Al are the better additives for increasing the density and width of compact layer and increasing the ability of anti-oxidation and anti-corrosion. The study on Si_ 3N_ 4-Al_ 2O_ 3, Si_ 3N_ 4-MgO, Si_ 3N_ 4-SiC systems is also enumerated as examples in the paper. The experimental results show that the converse reaction sintering is able to make high performance composites and metal Si and Al not only can promote the sintering but also increase the density and width of compact layer. | HONG Yanruo WU Hongpeng SUN Jialin | 2005 | China's Refractories2005，14，3： | 0 |
| 14 | Sintering Caβ″/β/α-Al_2O_3 High Temperature Oxygen Sensor显示文摘An extended-life and ultra-low oxygen sensor has been fabricated by using polycrystalline Caβ″/β/α-Al2O3 as a solid electrolyte. Five reference electrodes CaO+O2, Caβ″/β/α-Al2O3 (powder)+O2,Cr+Cr2O3, Nb+NbO and Mo+MoO2 were tested in order to select a better reference electrode for this sensor. The limit of determining oxygen activity and the extended-life of the sensor were also tested in this study. | Yanruo HONG Liansheng LI and Fengge ZHANG(National Laboratory on Solid Electrolytes and Metallurgical Measurements, University of Science and Technology Beijing, Beijing, 100083, China)(To whom correspondence should be addressed) | 1995 | Journal of Materials Science & Technology1995，11，5： | 0 |
| 15 | Effect of Chromium Powder on Sintering Property of Chrome Oxide Materials显示文摘The specimens were prepared using Cr2O3 micropowder, TiO2 micropowder and chromium powder as starting materials, PVA as binder, after spraying granulation and cold isostatic pressing, firing at 1 450 ℃ for 3 h in standard nitrogen and oxygen control atmosphere (oxygen partial pressure was 1 010 Pa and 10.1 Pa, respectively). Effects of chromium powder (mass percent were 0, 0.5%, 1.0%, 1.5% and 2.0%, respectively) on sintering behaviors of Cr2O3 materials were researched. The results show that: adding 0.5% chromium powder can obviously decrease the oxygen partial pressure in the specimens. Meanwhile, because the expansion caused by the oxidation reaction is small, Cr2O3 materials could realize the densification sintering under 1 010 Pa and 10.1 Pa of oxygen partial pressure. The chromium powder addition in Cr2O3 materials shouldn't be excessive, otherwise, the expansion reaction occupies a dominant position, which deteriorates the properties of the materials. | XU Yanqing FAN Zhihui SUN Honggang WANG Jinxiang HONG Yanruo CHEN Zhaoyou | 2009 | China's Refractories2009，18，4： | 0 |
| 16 | Magnesia-Chrome Refractories for Flash Furnace显示文摘The rapid development of our country's heavy nonferrous metallurgical technology and the revolution in new type of heavynon-ferrous metallurgical furnace have imposed more critical demand on the refractory materials ,i. e. high quality and long service life. This paper presents the domestic status of the refractories for flash furnace , briefly describes the wear of the refractory used , and it is considered that the domestic in refractories for flashfurnace can be surely realized. | LI Yong, CHEN Kaixian, LU Xinghua, LIU Jianlong, SUN Jialin , HONG Yanruo (Luoyang Refractories Group Co. , Ltd 471039 P. R. China) University of Science and Technology Beijing, Beijing 100083,China | 2002 | China's Refractories2002，11，1： | 0 |
| 17 | The Synthesis of β-Sialon Bonded Corundum Bricks from Al-Si Alloy显示文摘The paper presents a new method to synthesize β-Sialon bonded corundum brick(β-SBCB) from Al-Si alloy directly and easily under 1430℃,the volume expansion of reaction between Al powder and Nitrogen can help to establish the fast diffusion channel in Al-Si alloy;the suitable crystal seed of Si3N4 is helpful to the fast synthesis of β-Sialon. | CHEN Shihua HONG Yanruo 等 | 2002 | China's Refractories2002，11，4： | 0 |
| 18 | Electrochemical determination of Gibbs free energy of formation of magnesium ferrite显示文摘The standard Gibbs free energy of formation of magnesium ferrite was determined by means of two types of solid state electrochemical cells: one using MgZr4(PO4)6 (MZP) as the solid electrolyte and the other using CaF2 as the solid electrolyte. The first cell was operated in the range of 950 to 1100 K. The second cell was operated in the range of 1125 to 1200 K. The reversibility of the cell EMFs was confirmed by microcoulometric titration. The Gibbs energy changes of magnesium ferrite relative to component oxides were calculated based on EMF measurements and are given by following expressions, respectively: △G I = -3579-15 T (J/mol) and △G II =6258-24.3 T (J/mol). The results obtained from two different cells are consistent with each other. The results also are in agreement with Rao’s and Tretjakov’s data in the measured temperature range. When the Gibbs free energies of formation of MgO and Fe2O3 were substituted in the reaction, the Gibbs free energies of formation of MgFe2O4 was obtained in two temperature ranges and the formations are shown as follows: △G I Formation = -1427394+360.5 T (J/mol) and △G II Formation = -1417557+351.2 T (J/mol). | Ling Wang Huizhu Zhou Yanruo Hong Girish M Kale | 2007 | Journal of University of Science and Technology Beijing2007，14，4： | 0 |
| 19 | Effect of Si_3N_4 on Resistance of Magnesia Based Castable显示文摘The magnesia based curable specimens with different Si3N4 contents were casted using sintered magnesite (w(MgO)=95%) as starting material, SiO2 micro-powder as binder, 0.3%, 4% and 5% β-Si3N4 powder replacing the equal addition of magnesia powder respectively. The slag resistance test was carried out at 1550℃ for 3h using Baosteel tundish slag and static crucible method. The result indicates that: introducing Si3N4 could obviously improve the slag resistance of MgO based castable, which increased with increasing Si3N4. Dense SiO2 sintered layer formed on the surface of magnesia based castable because of the oxidation of Si3N4 addition, which can prevent the further slag penetration. In the deep inner of castable, the partial-pressure of oxygen was very low, so Si3N4 can exist stably. Meanwhile in reducing atmosphere, Si3N4 was hard to be sintered, which resulted in the loose interior structure of MgO based castable. | ZHANG Jingyu QIN Wei XU Deting SUN Jialin HONG Yanruo | 2007 | China's Refractories2007，16，3： | 0 |
| 20 | A Novel Electrochemical Oxygen Sensor for Determination of Ultra-low Oxygen Contents in Molten Metal显示文摘A novel electrochemical oxygen sensor has been developed by using Laβ-Al2O3 as solid electrolyte and Cr+Cr2O3 as reference electrode. The sensor not only can be used as normal oxygen sensor hot also as an ultra-low oxygen sensor. Especially, it is very sensitive to measure ultra-low oxygen in molten metal. For estimating the accuracy of Laβ-Al2O3 oxygen sensor, two series of oxygen activities in molten iron at different oxygen contents and different temperature were measured by both Laβ-Al2O3 oxygen sensor and ZrO2 oxygen sensor. The theoretical values of oxygen activities in molten iron (3.30%C, in mass fraction) at 1723K and 1745K were also evaluated for comparing the measuring results of two sensors. At last, the error of measurement for Laβ-Al2O3 oxygen sensor was discussed too. | Jialin Sun, Congjin Jin, Liansheng Li, Yanruo Hong (National Laboratory on Solid Electrolytes and Metallurgical Testing Techniques, University of Science and Technology Beijing, Beijing 100083, China) | 2001 | Journal of University of Science and Technology Beijing2001，8，2： | 0 |
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