1 / 21

DCP 2143 CERAMIC MATERIAL: NON-CLAY

DCP 2143 CERAMIC MATERIAL: NON-CLAY. CODE: DCP 2143 COURSEWORK: 60% TEST 1 : 15% TEST 2 : 15% LAB : 30% FINAL EXAM : 40%. SCOPE OF SUBJECT. UNIT 1.0 Introduction to Non-Clay Materials - what is non-clay material

olive
Download Presentation

DCP 2143 CERAMIC MATERIAL: NON-CLAY

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. DCP 2143 CERAMIC MATERIAL: NON-CLAY • CODE: DCP 2143 • COURSEWORK: 60% • TEST 1 : 15% • TEST 2 : 15% • LAB : 30% • FINAL EXAM : 40%

  2. SCOPE OF SUBJECT UNIT 1.0 Introduction to Non-Clay Materials - what is non-clay material - function of non-clay material UNIT 2.0 Feldspar – mineralogy, properties, application, type of feldspar (plagioclase,orthoclase,nephelinesyenite) UNIT 3.0 SILICA - mineralogy, properties, application,type of silica group, - quartz,tridymite, cristobalite UNIT 4.0 OTHERS NON-CLAY MATERIALS - talc, bauxite,dolomite,limestone,magnesite ,bone ash, wollastonite UNIT 5.0 GPYSUM - chemical, type and characteristics of plaster, consistency , setting time, water/plaster ratio, UNIT 6.0 ADVANCED CERAMIC MATERIALS - alumina, zirconia, silicon carbide, silicon nitride and others UNIT 7.0 OTHERS COMPONENT RAW MATERIALS - binder,deflocculant, pigment

  3. INTRODUCTION • This subject provides strong theoretical overview on understanding and fundamental of non-clay ceramic materials, its properties and characteristics incorporating laboratory and hand-on work on the behavior and characteristics of some of the materials. • The subject present basic theories and hands-on facts concerning such non-clay materials like feldspar, silica, alumina, talc, dolomite, zirconia, plaster of paris and etc. with respect to their uses ceramics science and technology

  4. LEARNING OBJECTIVES • Explain the function of non-clay materials for ceramic applications • To provide the students with the fundamental and hands-on knowledge on usage of non-clay material for ceramic manufacturing process • Explain the characteristics and identification of non-clay material

  5. UNIT 1 INTRODUCTION TO NON-PLASTIC MATERIALS

  6. LEARNING OUTCOMES • At the end of the lesson, student should be able to: • Explain the definition of non-clay materials • Explain the function of fluxes • Explain the function of fillers • List raw materials of non-clay materials

  7. COMPOSITION OF COMMON CERAMIC BODIES

  8. COMPOSITION OF COMMON CERAMIC BODIES

  9. INTRODUCTION TO NON-PLASTIC MATERIALS • What is non-plastic or non-clay materials? • This group of ceramic materials involves rocks, minerals and artificial or synthetic minerals that when mixed with water does not exhibit plasticity.

  10. ROLES OF NON-PLASTIC MATERIALS • Non-clay materials provide the desired influence on the green and fired properties of ceramics. • Some non-clay materials do not need to be mixed with clay to form ceramics; examples are alumina, zirconia, etc. • A part of non-clay acts as: • >fillersin the ceramic body, • > some act asfluxes • > improve the refractoriness of the body. • > some non-clay materials are also used as • coloring substances. • .

  11. ROLE OF NON-PLASTIC MATERIALS: FLUXES What are Fluxes ? • A flux is substance that lowers the melting or softening temperature of the mix or compound in which it is present • In ceramics it is used to lower the temperature at which liquid form during firing. This liquid when cooled formed glass that bind the grains of the body together. • Therefore by adding flux stronger body or product can be formed at lower firing temperature. • For example most ceramic such as porcelain can be fired between 1100-1300 oC by adding feldspar.

  12. Fluxing effect in microstructure of ceramic Grains in ceramic before formation of glass Formation of glass phase: individual grains fused together

  13. REACTIONS OCCURING DURING FIRING IN CERAMIC BODY

  14. PROPERTIES OF FLUXING MATERIAL Fluxes are usually made up of: • Alkali or alkali earth containing minerals which melt on firing and react with other body constituents to form glass. • Fluxing oxides such as those of the RO group like K2O, Na2O, CaO, Li2O, MgO, B2O3. • The higher the alkali content of the material the more effective the fluxing action.

  15. Others the important criteria of flux : • Impurity: • Fe2O3 contents will give color to the flux • The particle size: • The smaller the particle size the more effective the fluxing action.

  16. Example of common flux used in ceramics: • feldpars, • cornish stones, • nephelinesynite, • sericitic stones

  17. ROLE OF NON-PLASTIC MATERIALS: FILLERS Fillers are non-plastic materials used in body composition which are not fluxes. Example • Silica, • Alumina • Calcium carbonate • Etc…….

  18. The functions of filler are: • > Ceramic bodies • to open up the body/ framework/structure of ceramic body • to facilitate drying process • reduce shrinkage and • reduce plasticity. • Fillers contribute a significant proportion of body composition, therefore particle size distribution is important in determining particle packing in the body. • Example: silica, alumina, grog, flint, etc.

  19. The functions of filler are: • > Paints, plastic, rubber • Good dispersability, • High chemical inert • pH stability • High resistance to abrasion • Low viscosity at high filler loading. • Example: felsdpar, calcium carbonate

  20. REVIEW…. WHAT IS THE NON-PLASTIC MATERIALS ? GIVE EXAMPLE OF FLUX AND FILLER MATERIALS ? WHAT IS THE FUNCTION OF FLUXING MATERIALS IN CERAMIC BODIES ? WHAT IS THE FUNCTION OF FILLER ?

  21. Kualitidiriseseorangbisadiukurdarikemampuannyamenjagalidah. Orang-orangberimantentuakanberhati-hatidalammenggunakanlidahnya. "Wahaiorang-orangberimantakutlah kalian pada Allah danberkatalahdengankata-kata yang benar." (QS Al-Ahzab:70).Sementaraitu, Rasulullah saw bersabda, "Siapa yang berimanpada Allah danhariakhir, makahendaklahdiaberkatabaikataudiam". (HR Bukhari-Muslim).

More Related