Study on the growth habit and optical property of DKDP crystal grown by different seed

Microstructural evolution during directional solidification(DS)of Ti-47Al alloy grown from Ti-43Al-3Si seed was studied.

The evolution of solid/liquid interface during single crystal superalloy growth by seeding technique was investigated.

AlOOH nanometer powders were prepared from Al(NO_3)_3·9H_2O and ammonia by adding seeds through hydrothermal method.

The effect of α-Al2O3 seeds (-150nm) on the phase transformation and micrograph of alumina was studied.

In the present dissertation,the study is on fabricating high quality hydrothermal ZnO crystals,is on influences on crystal s appearances and quality under growing conditions of spontaneous crystallizations,is on manufacturing autoclave with lining for growing large size ZnO crystals,is on crystal s quality under varied growing conditions with seeds.

TiAl Seed Preparation & Fully Lamellar Structure Control Through Seeding and Directional Solidification;

Milling process, α-Al_2O_3 seeding, and some additives such as TiO_2, MgO, NH_4NO_3, etc, were usually adopted to decrease the α-phase transformation temperature, leading to producing ultrafined and agglomeration-free alumina powder.

Then, we utilized the additives of α -AL_2O_3 powder seeding, alumina sol seeding, TiO_2-sol , ammonium nitrate , and high-energy ball milling on the precursors to investigate these factors'.

Natural diamond with seed crystal is discovered for the first time in Hunan Province by the study of synchrotron radiation X-ray diffraction topography.