Why is separating hafnium from zirconium important for nuclear reactor cladding materials?

Hafnium causes zirconium to become brittle at low temperatures

Hafnium alloying increases zirconium's thermal expansion too much

Zirconium must be low in hafnium because hafnium strongly absorbs neutrons

Hafnium promotes corrosion of zirconium in water

Which separation method is commonly used to separate hafnium from zirconium in industry?

Liquid–liquid extraction of their tetrachlorides

Steam distillation of the oxides

Electrorefining of the pure metal

Gate dielectric in CMOS integrated circuits

Noble metal alloys (gold/silver)

Exceptional electrical insulation

Very high neutron absorption cross-section

10 questionsSign in to saveupdated 3 days ago

Quizzes · Knowledge

Random

Preview · 10 questions

01Why is separating hafnium from zirconium important for nuclear reactor cladding materials?
02Hafnium is chemically most similar to which other group 4 transition metal?
03Which separation method is commonly used to separate hafnium from zirconium in industry?
04Which oxidation state is most characteristic for hafnium in stable compounds?
05Which electronic application uses hafnium dioxide (HfO2) because of its high dielectric constant?
06What is the atomic number of hafnium?
07Besides control rods and electronics, hafnium is alloyed with which class of materials for improved high-temperature performance?
08Which property of hafnium carbide (HfC) makes it notable for high-temperature applications?
09What is the principal industrial reason hafnium is used in nuclear reactor control rods?
10In which common mineral is hafnium most frequently found combined with zirconium?