synthesis of high coercivity ferrite magnets

... display a room temperature coercivity of 200 Oe This coercivity is much higher than the bulk coercivity values of both the Ni (Hc = 0.7 Oe) and Co (Hc = 10 Oe) [22] The enhanced coercivity in Ni @ Co ... analysis of these nanorods has been carried out using EDS and is shown in Fig Fig a TEM image of Co NT, b TEM image of Ni NW (inset: ED of Ni NW), c FESEM image of Ni @ Co nanorods, and d TEM image of ... shape anisotropy of the samples mentioned in the earlier report is much higher (aspect ratio of Co NTs is *330) than that of the present (aspect ratio of Ni @ Co nanorods is *100) The coercivity value...

Ngày tải lên: 22/06/2014, 00:20

... comments * References PART II CHAPTER I of of of of of of of of of of of of of of ZSM-34 ferrieritejZSM-35-type materials ZSM-39 high- silica ZSM-6 with TMA high- silica mordenite ZSM-12 zeolite PHI ... zeolites * Specific recipes Synthesis Synthesis Synthesis Synthesis Synthesis Synthesis Synthesis Synthesis Synthesis 10 Synthesis 11 Synthesis 12 Synthesis 13 Synthesis 14 Synthesis * General comments ... TPA * Synthesis of ZSM-5 in the presence of amines * Synthesis of ZSM-5 in the presence of alcohols * The use of various templates in ZSM-5 synthesis * Synthesis of ZSM-5 in the absence of any...

Ngày tải lên: 31/05/2014, 02:07

... Strong Thermal stability Low High Good Mediumhigh Mediumhigh High Chemical stability Lowmedium High High High Very high High Costs Low High High Lowmedium Medium Medium Life Short Long Long Mediumlong ... Decomposition of 2-Propanol 18 1.6 Decomposition of 4-Methyl-2-Pentanol 25 1.7 Aim of Project 28 References 30 Chapter II Experimental 2.1 Preparation of Catalysts 36 36 2.1.1 Synthesis of Zirconia ... is that of the acid form of the indicator, then the acidic strength Ho of the investigated surface is less than or equal to the pKa of the conjugate acid of the indicator The amount of a solid...

Ngày tải lên: 16/10/2015, 12:00

... theoretical capacity of Fe2O3 is as high as 1005 mAh/g, which is much higher than that of the theoretical capacity of graphite anode materials (372 mAh/g) The extraction of lithium ion from Li2O ... that can reveal the electrochemical mechanism of reactions Fig shows the first three cycles of CV curves of Page of 14 the nanowires in the range of 0.01-3 V It is clear that there is a substantial ... 315-318 Page of 14 Caption of figures Fig X-ray diffraction pattern of alpha phase iron oxide nanowires Fig SEM and TEM Images of Fe2O3 nanowires and precursors a) The SEM image of ip t Fe2O3...

Ngày tải lên: 20/03/2014, 13:05

... led to the formation of WO3 , the SEM of which is shown in Fig 3c and covers the Pt (same substrate as in Fig 3a); the microstructure of WO3 is clearer in the magnified image of Fig 3d The grain ... 700 ◦ C for h (Sensor C); (e) cross-section of the WO3 /Pt/YSZ interface (Sensor C); (f) higher magnification micrograph of the FIB-cut cross-section of WO3 /Pt/YSZ, protective Pt was deposited ... at low concentrations of NO2 , the commercial powder does have higher sensitivity than the peroxy-based generation of WO3 ; this could arise from the smaller particles of WO3 in the peroxy-case...

Ngày tải lên: 20/03/2014, 13:07

... have a BET surface area of 15.2 m2 /g, while SnO2 nanotubes have a surface area of 45.6 m2 /g The crystal structure of the SnO2 nanotubes was further analysed by TEM and high resolution TEM (HRTEM) ... general morphology of SnO2 nanotubes was observed by FE-SEM and is shown in Fig The as-prepared SnO2 nanotubes have lengths of Fig FESEM image of SnO2 nanotubes The inset is a top view of SnO2 nanotube ... (2008) 313–317 Fig (a) TEM image of a single SnO2 nanotube Inset: selected area electrondiffraction pattern (b) HRTEM image of a portion of a SnO2 nanotube the range of 10–20 nm The lattice spacing...

Ngày tải lên: 20/03/2014, 13:08

... rate of 20 C, the capacity of the nano-Li4Ti5O12 powders was still high: 112 mAh g−1 This outstanding performance at high rates was much better than that afforded by any of the various types of ... Facile synthesis of nano-Li4Ti5O12 for high- rate Li-ion battery anodes Yun-Ho Jin1, Kyung-Mi Min1, Hyun-Woo Shim1, Seung-Deok Seo1, In-Sung Hwang1, Kyung-Soo Park1, and Dong-Wan Kim*1 Department of ... size of these nano-Li4Ti5O12 particles was 50 to 100 nm High Li electroactivity was confirmed by CV experiments The nano-Li4Ti5O12 particles calcined at 700°C showed a high Li storage capacity of...

Ngày tải lên: 20/06/2014, 23:20

... Preparation of nano-size ZrB2 powder by selfpropagating high- temperature synthesis J Eur Ceram Soc 2009, 29:1501-1506 15 Nersisyan HH, Lee JH, Won CW: Self-propagating high- temperature synthesis of nano-sized ... by Graduate Innovation Fund of Jilin University Author details Key Laboratory of Automobile Materials, Ministry of Education, People’s Republic of China 2Department of Materials Science and Engineering, ... on the synthesis of TiB2 powder by a self-propagating high- temperature synthesis technique Mater Lett 2004, 58:733-738 13 Khanra AK, Pathak LC, Mishra SK, Godkhindi MM: Self-propagating-hightemperature...

Ngày tải lên: 21/06/2014, 00:20

... method of synthesis for the production of MWCNTs or other graphitic nanocarbons Indeed, because of the simplicity and high yield of this route, it may potentially be applied on the scale of industrial ... determination of the surface areas of solid materials and involves the use of the BET equation:   1 CÀ1 P ¼ þ W½ðP0 =PÞ À 1Š Wm C Wm C P0 wherein W is the weight of gas adsorbed at a relative pressure of ... transitions of nanocarbon as functions of its size and temperature through systematically considering the effects of surface stresses and surface energies The fine nanosize amorphous structure of pure...

Ngày tải lên: 22/06/2014, 01:20

... of materials because of the microwave energy transfers to the thermal energy by collision between rotating materials Therefore, the generation of localized high temperatures in the presence of ... nanoparticles of samples prepared at shorter time have higher surface activity with which can absorb more water than that of samples prepared at longer heating time The content of crystal water of two ... formation of ferrite phase within short time indicates the advantage of microwave heating When the microwave is applied in the system, microwave induces the rotation and migration of materials...

Ngày tải lên: 22/06/2014, 22:20

... is a branch of physical chemistry, material research, and thermal analysis It is based on continuous recording of mass changes of a sample of material, as a function of a combination of temperature ... methods for synthesis of CNTs according to techniques making catalyst as described below: CVD method on flat substrates For the CVD synthesis of CNTs on flat substrates, a quartz tube is often 15 ... the head of growing CNT (weak catalyst-support interaction) 1.5 Purification A major problem with applications of carbon nanotubes beside large-scale synthesis is their purity Most of the synthesis...

Ngày tải lên: 25/03/2015, 11:57

... during the synthesis of nickel ferrite nanoparticles? What are the properties of drug carriers consisting of nickel ferrite nanoparticles and polymer? What is the cytotoxicity of nickel ferrite ... delivery 1.1.3 Nickel ferrite magnetic nanoparticles 1.2 Research work of this thesis 1.2.1 Synthesis and characterization of nickel ferrite nanoparticles 1.2.2 Composite of nickel ferrite nanoparticles ... Configurations of monolayer or bilayer of oleic acid on particle surfaces Figure 5-4 TGA results of nickel ferrite particles (a) C1, C1+S and (b) C2, C2+S Figure 5-5 Cell viabilities of nickel ferrite...

Ngày tải lên: 14/09/2015, 17:50

... income status, weight, height, pattern of salt intake, dietary pattern, history of diabetes, family history of hypertension, past history of any examination of blood pressure and hypertension, or ... (ECG), irrespective of level of blood pressure Participants who were below 40 years of age, only those who had hypertension and complained of typical precordial pain suggestive of ischemic heart ... 14.1% of the participants had normal blood pressure A large number of participants could be categorized in prehypertensive group Overall prevalence of hypertension with a cut off mark of 140/90...

Ngày tải lên: 02/11/2012, 11:12

... CONTEXT OF HIGH SCHOOL CLASSROOMS AT PHAM VAN NGHI UPPER SECONDARY SCHOOL, NAM DINH PROVINCE: A CASE STUDY Is the result of my own research for the Degree of Master of Arts at College of Foreign ... experience b The age of the teacher effect most on the c The language proficiency of the success of a pair teacher work and group d The teacher’s ability of organizing e The hardship of the students ... experience The age of the teacher think can most effect The language proficiency of the the success of a pair teacher work and group The teacher’s ability of organizing The hardship of the students...

Ngày tải lên: 07/11/2012, 14:54

... existence of variable reluctance in the air gap of the machine, high reluctance in the quadrature axis and low reluctance in the direct axis It is now well known fact that RSM output increases with high ... a high saliency ratio (Ld/Lq) accompanied by a high (Ld-Lq), i.e a high Ld and low Lq Finite element package is employed to compute the flux distribution and inductances The other purpose of ... arrangement of insulation and magnetic material in the rotor can result in high saliency ratio and not the amount of insulation and magnetic material It is worth mentioning that the amount of magnetic...

Ngày tải lên: 05/09/2013, 16:30

... the Participation of High School Students in Speaking Lessons TABLE OF CONTENTS ACKNOWLEDGEMENTS i LIST OF ABBREVIATIONS ii LIST OF TABLES iii TABLE OF CONTENTS ... INTRODUCTION 1 Rationale of the Study Aims of the Study Scope of the Study Methods of the Study Design of the Study PART II: CONTENTS ... Participation of High School Students in Speaking Lessons There are varieties of measures that are available for the research However, in the narrow scope of the Study, we only use some of them They...

Ngày tải lên: 18/12/2013, 10:08

... are founded Type of Evidence Category of Type of Evidence Description of Type of Evidence A Major randomized controlled clinical trials (RCTs) B Smaller RCTs and meta-analyses of other clinical ... Clinical experience Strength of Evidence Category of Strength of Evidence Description of Strength of Evidence The ATP III panel extensively analyzed the results of recent clinical trials whose ... Study, INTACT ∆ See List of Studies appendix for listing of the full names of these clinical trials II–4 Results of clinical trials of LDL lowering find support from a review of world-wide prospective...

Ngày tải lên: 14/02/2014, 09:20

... pockets of inefficiency that can only be remedied through the adoption of contemporary business practices Some highly visible examples of inefficiency include areas with a high deployment of secretaries ... referenced Because of the size of the capital investment, the similarity of need, the rate of change in information technology, and the proliferation of vendors, the creation of a public framework ... responsibility and oversight This type of model has led to the emergence of pockets of MIS resources outside of the primary computing environment Lack of training and funding are two critical...

Ngày tải lên: 18/02/2014, 11:20

... movement of the cofactor-binding domain of subunit A relative to subunits B and C (not shown) This domain alteration involves a rotation of 5° and translation of ˚ 0.7 A Five segments of polypeptide ... hydrogen bond with the C3-hydroxyl of RU5P, C2-hydroxyl of PEX or the C4-hydroxyl of 6PG (in the modelled ternary complex) Some 84 residues of the cofactor-binding domain of LlPDH are strictly conserved ... occupancies Superposition of subunit A on B and C (468 Ca atoms) in complex II and III of LlPDH gives an rmsd of ˚ 1.6 A in each case, however, superposition of B on C ˚ gives an rmsd of only 0.3 A We...

Ngày tải lên: 19/02/2014, 05:20