Crystal growth and characterizations of quartz-like material: gallium phosphate (GaPO4)

摘要: This investigation concerns GaPO 4 crystal growth in phosphoric and sulphuric acid media by the slow heating vertical reverse temperature gradient methods. Systematic study of parameters shows that rate V x is generally much greater than other two, z y . The most interesting result ability to produce epitaxy on large berlinite seeds use them for where /V Z ratio can be close 1. As α-quartz berlinite, being always very slow, lengthening these crystals direction obtained several joined accurately adjusted spliced a quartz plate. epitaxial fit crystalline quality have been checked X-ray topography. OH content, determined infrared near spectrometry, proves lower concentration case when approximatively same conditions are used. Piezoelectric characterizations resonators suitable specify AT-cut position, its promising piezoelectric properties with high thermal stability Q factor already nearly sufficient applications. crystals, properties, compared those known related their structure distortions. observed evolution allows prediction some unknown characteristics quartz-like materials.