“chemical engineering”

Associated Professor Gaida-Maruta Sedmale

Course description: 4Credit units; 48hours (48 lectures)

Control forms: exam
Course content:

Aim: to provide knowledge of the new ceramics materials, their production methods, important properties to emphasing problems related to using materials.

• 
  Characteristics of new ceramics, history of development, classification.
  
• 
  The powder producion methods:
  

-synthesis by the solid-state reaction, by process of melting, in solution ( by the methods of spraying, of distribution of salts, of precipitates, hydrothermal, sol-gel),

-synthesis by the reactin in the gas phase.

• 
  Characterisation of ceramic powders.
  
• 
  The powder treament: particle sizing, granulation, calcination.
  
• 
  Forming: fundamentals of forming. Powder compaction processes: dry pressing, casting, extrusion, injection molding. Non-tradicional methods: hot pressing, hot isostatic pressing, sol-gel process, reaction forming processes.
  
• 
  Firing/sintering: fundamentals of sintering. Solid-state sinterig, liquid-phase sintering, rection sintering, pressyre densification, grain growth.
  
• 
  Final shaping and surface finishing.
  
• 
  Advanced ceramics materials: magnium, aluminium, zirconia oxide based. Electroceramic, thermishe and magnetishe materialien.
  

Literature:

1. 
   Samuel J. Schneider (Technical chairman). Ceramic and Glasses. Volume 4. Engineering materials Handbook,1217 p.
   
2. 
   J. Kriegesman.Technische Keramische Werkstoffe. Deutsches Wirtschaftsdienst,1989, Teil 1-4 (Teil1)
   
3. 
   G.G. Vjcrdf> 1969>304 cnh.
   
4. 
   Salmang-Scholze. Keramik. Teil2. Springler Verlag,1983,275 S.
   
5. 
   E.Krause,I.Berger u.a. Technologie der Keramik.Band1. VEB Verlag für Bauwesen,Berlin,278 S.
   
6. 
   Gjl htl. {.Zyfublf. Njyrfz nt[ybxtcrfz rthfvbrf> Vjcrdf> 1986> 277 cnh.
   

Physics and chemistry of solid state

ĶST 410

Assistant Professor Ruta Švinka

Course description: 2 Credit units; 32 hours (32 lectures)

Control forms: exam
Course content:

• 
  Chemical bond in the solid substance. Crystalls with the ionic, covalentic, metallic and molecular bond. Crystalls with the mixed bond: ionic - covalentic bond and electronegativity. Covalentic - metallic bond and semi - conductors. Ionic - metallic bond and intrametallic compounds. Influence of various factors on the crystallchemical structure of solid substance:
  

stechiometry of compounds and coordinative numbers

kind of chemical bond

size of atoms or ions

rule of ratio of radius

energy of crystalline lattice of ionic crystalls

polarization and partial charge of atoms

coordinative - polymeric structure and Sanderson’s model

effective charge of atomic nucleus

atomic radius

electronegativity and partial atomic charge

• 
  Solid solutions and isomorphous. Isostructure. Isomorphysmus. Solid solution of substitution. Solid solution of intrusion. Solid solution of displacing or non-stechiometric compounds.
  
• 
  Electron structure of solid body. General conception of theory of zone. Zone structure of metalls, dielectrics and semi-conductors. Change of electroconductivity of semi-conductors on dependence of temperature. Semi-conductors with checking value. Photoconductivity and lasers. Electrical properties of solid substance. Kinds of electroconductivity. Conductors and superconductors. Ionic electroconductivity in the crystalls. Solid electrolyte. Polycrystalline ceramics. Kinds of polarisation. Dielectric durability. Dielectrics loss in the crystalls and glasses. Ferroelectrics of oxide ceramics. Antiferroelectrics.
  
• 
  Thermal properties of solid substance. Thermal capacity. Thermal conductivity of glases and multiphase polycrystalline ceramics. Thermal expansion of solid substance. Unharmonius thermal oscillation. Dependence of thermal expansion coefficient on the temperature, composition of materials and structure. Materials with positive or negative thermal expansion coefficient.
  
• 
  Optical properties of solid substance. Refractive index and dispersion. Reflection and refraction of light. Absorption of light and colour of materials. Opacifiers and permeability of light.
  
• 
  Magnetic properties of solid substance. Magnetic ceramics. Ferrite.
  
• 
  Mechanical properties of solid substance.
  

Literature:

1. 
   A.R.West. Solid State Chemistry and its Applications. V.I, II Chichester, New York, Brisben, 1984.
   

Fundamentals of new ceramics processing

ĶST 417

Associated professor Gaida-Maruta Sedmale

Course description: 2Credit units 32hours (32 lectures)

Control forms: test
Course content:

Aim: to provide knowledge of the powder production and synthesis for advanced ceramics.

• 
  Characterization of advanced ceramics.
  
• 
  Powder production and synthesis: raw materials, chemical synthesis, characterization of powders.
  
• 
  Powder treatment: comminution, particle sizing, granulation, calcination.
  
• 
  Forming.
  
• 
  Sintering.
  

Literature:

1. 
   Samuel J. Schneider (Technical chairman). Ceramic and Glasses. Volume 4. Engineering materials Handbook,1217 p.
   
2. 
   J. Kriegesman.Technische Keramische Werkstoffe. Deutsches Wirtschaftsdienst,1989, Teil 1-4 (Teil1)
   

Chemical technology of plasma

ĶST 440