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SYNTHESIS OF ULTRAFINE PLZT POWDER BY A SIMPLE CO- PRECIPITATION METHOD

H. Ying1) , X. D. Sun1) , Q. B. Yang1) , J. B. Li2) , Y. M. Wang2) , Z. Zhang3) and J. You3)1) School of Materials and Metallurgy , Northeastern University , Shenyang 110006 , China2) Departm ent of Materials , School of Mechanical Engineering , Shenyang University , Shenyang110044 , China3) Liaoning Analyzing and Testing Research Center , Shenyang 110015 , China

金属学报(英文版)

Starting from cheap inorganic salts , ultrafine P L Z T po w ders were synthesized by a co pre cipitation m ethod . The results show that the precursor precipitate obtained by the co precipita tion method transfor ms co m pletely to P L Z T phase by calcining at 420 ℃ for 4 hours , about300 ℃...

关键词: P L Z T , null , null

PRODUCTION OF ULTRA-FINEα-AL2O3 PO WDERSFROM AMMONIUM A LUMINUM CARBONATE HY DROXIDE

F. Zhang1) , X. D. Sun1) , J. You2) , Z. Zhang2) , L. X. Ding3)and Y. M. Wang3)1) School of Materials and Metallurgy , Northeastern University , Shenyang 110006 , China2) Liaoning Analyzing and Testing Research Center , Shenyang 110015 , China3) Department of Materials , School of Mechanical Engineering , Shenyang University , Shenyang 110044 , China

金属学报(英文版)

Synthesis of a m m oniu m alu min u m carbonate hydroxide ( A A C H) w as investigated usinga m m oniu m alu min u m sulfate and a m moniu m hydro carbonate as the starting m aterials . Itw as found that A A C Hcan be synthesized by adding a m m oniu m alu m inu m sulfate solution torapidly stir...

关键词: a m moniu m alu m inu m carbonate hydroxide , null , null , null

EFFECT OF PRECIPITANT ON THE PROPERTIES OF ULTRAFINE YTTRIA POW DER PRODUCED BY PRE CIPITATION METHOD

Y. Q. Jia1) , J. G. Li1) , Y. M. Wang2) , L. X. Ding2) , X. M . Qin1) and X. D. Sun1)1) School of Materials and Metallurgy , Northeastern University , Shenyang 110006 , China2) Department of Materials , School of Mechanical Engineering , Shenyang University , Shenyang 110044 , China

金属学报(英文版)

Using yttriu m nitrate as the m other salt , synthesis of ultrafine yttria po w der through w et che mical route w as investigated . Choice of precipitant has dra m atic effects on co m position ,particle size distribution and particle m orphology of the precipitates . When a m m onia solutionw a...

关键词: KEYW ORDS yttria , null , null , null

A APPLICATION OF ANSYS ON A SECTION EXTRUSION DIE

H.W.Liu 1) , H.Ding 2) and J.Z.Cui 2) 1) School of Mechanical Engineering , Shenyang University , Shenyang 110044 , China 2) School of Materials & Metallurgy , Northeastern University , Shenyang 110006 , China

金属学报(英文版)

Porthole dies are important tools in extrusion process to produce hollow sections and the life of the dies counts for the cost of products. In this work, the finite element method was adopted to analyze a particular porthole die to produce hollow rectangle sections which are widely used in construct...

关键词: section extrusion , null , null

A STUDY OF EXPERT SYSTEM FOR SECTION EXTRUSION PROCESS BASED ON FINITE ELEMENT METHOD SIMULATION

H.W.Liu 1) , H.Ding 2) and J.Z.Cui 2) 1) School of Mechanical Engineering , Shenyang University , Shenyang 110044 , China 2) School of Materials & Metallurgy , Northeastern University , Shenyang 110006 , China

金属学报(英文版)

The samples obtained by Finite Element Method (FEM) simulation for section extrusion process have been trained on BP Neural Networks. The mapping relationsbetween die's geometrical parameters and energetic parameters, such as stress and strain generated in the die are established. The extrusion proc...

关键词: BP neural networks , null , null , null

STUDY ON C FIBER REINFORCED CELSIAN MATRIX COMPOSITES

X.W.Yin , L.F.Cheng , L.T.Zhang , W.C.Zhou and Y.D.Xu State Key Laboratory of Solidification Processing , Northwestern Polytechnical University , Xi′an 710072 , China

金属学报(英文版)

Strong, tough, and almost fully dense C fiber reinforced celsian matrix composites have been fabricated by impregnation of the fiber tows with the matrix slurry, winding on a drum, drying, stacking the prepreg tapes in the desired orientation, and hot pressing. The monoclinic celsian phase in the...

关键词: barium aluminosilicate , null , null , null , null

DIRECT SYNTHESIS OF SIA LON/ SiC MULTIPHASE REF RACTORY USING CLAY

H. Q. Ru1) , N. Zhang2) , P. Z. Yu1) and X. D. Sun1)1) Northeastern University , Shenyang 110006 , China2) Shenyang University , Shenyang 110044 , China

金属学报(英文版)

Sialon/ Si C m ultiphase refractory w as directly synthesized using cheap clay , Si C particlesand proper ad ditives . The new synthesizing process is si m ple an d of low cost . The synthesizedm aterial has good roo m tem perature m echanical properties and ther m al shock resistance . Thisw o...

关键词: clay , null , null

MECHANISM RESEARCH ON MECHANICS PROPERTIES’FLUCTUATION OF 67CrVA PATENTED SPRING STEEL WIRE

Z.T. Yang , X.Q. Xing , H.Y. Wang and S.L. Tao Departmentof Research and Design , Research Institute of Steel Wire and Wire Products , Zhengzhou 450007 , China

金属学报(英文版)

Advanced TEMand SEMexperimenteinstrumentshave been used to analysethe Φ4 5 m m , 67 CrVAspringsteel wire, which hasbeen patented underthe processof920℃×3 15 min + (500 ～600)℃×2 min. The mechanics properties’fluctuation and corresponding mi crostructure featuresof which havebeenstudied....

关键词: CrVAsteel wire , null , null

THE INFLUENCE OF COMPOSITION AND TEMPERATURE OF BATH ANDAFTER-TREATMENT 0N COLORATION IN COLORING HOT DIPGALVANIZATION

Q. C. Le and J. Z. Cui School of Materials & Metallurgy , Northeastern University , Shenyang 110006 , China

金属学报(英文版)

The 08 Al steel sheets were hot dip ped into Zn - Mn bath with 0 1 % Mn and 0 2 % Mn at600 ～420 ℃ bath tem perature , and then w ere treated in different w ays . The after - treat ments include cooling in the air at room tem perature directly , holding at the upper part of thehot dip galvan...

关键词: coloring hot dip galvanization , null , null

THE MECHANISM OF ACCEPTING, DONATING AND EXCHANGING ELECTRONS IN SUPERCONDUCTOR

X.Z. Tian Schoolof Material Science and Engineering , Shanghai University No.149 Yanchang Road , Shanghai 200072 , China

金属学报(英文版)

Based on ’Theoryof Electron Donating, Accepting and Exchanging’whichtheauthorpub lishedin 1989 ,thispaperexplainsin detailsaboutthesuperconductivityof metallicelements,metalliccompoundsand alloys. Italso providesa methodto raise Tc....

关键词: superconductor , null , null

材料期刊网

SYNTHESIS OF ULTRAFINE PLZT POWDER BY A SIMPLE CO- PRECIPITATION METHOD

PRODUCTION OF ULTRA-FINEα-AL2O3 PO WDERSFROM AMMONIUM A LUMINUM CARBONATE HY DROXIDE

EFFECT OF PRECIPITANT ON THE PROPERTIES OF ULTRAFINE YTTRIA POW DER PRODUCED BY PRE CIPITATION METHOD

A APPLICATION OF ANSYS ON A SECTION EXTRUSION DIE

A STUDY OF EXPERT SYSTEM FOR SECTION EXTRUSION PROCESS BASED ON FINITE ELEMENT METHOD SIMULATION

STUDY ON C FIBER REINFORCED CELSIAN MATRIX COMPOSITES

DIRECT SYNTHESIS OF SIA LON/ SiC MULTIPHASE REF RACTORY USING CLAY

MECHANISM RESEARCH ON MECHANICS PROPERTIES’FLUCTUATION OF 67CrVA PATENTED SPRING STEEL WIRE

THE INFLUENCE OF COMPOSITION AND TEMPERATURE OF BATH ANDAFTER-TREATMENT 0N COLORATION IN COLORING HOT DIPGALVANIZATION

THE MECHANISM OF ACCEPTING, DONATING AND EXCHANGING ELECTRONS IN SUPERCONDUCTOR

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