Growth of lead molybdate crystals by vertical Bridgman method

Abstract

The growth of PbMoO 4 crystals by the modified Bridgman method has been reported in this paper. The feed material with strict stoichiometric composition is desirable for the Bridgman growth of the crystals. The continuous composition change of the melts during growth can be avoided because the volatilization of melts is limited by sealed platinum crucibles. By means of the optimum growth parameters such as the growth rate of < 1⋅ ⋅2 mm/h and the temperature gradient of 20 ~ 40°C/cm across the solid-liquid interface under the furnace temperature of 1140 ∼ ∼ 1200°C, large size crystals with high optical uniformity were grown successfully. The distribution of Pb and Mo concentration along the growth axis was measured by X-ray fluorescence analysis. The single crystallinity of the grown sample was evaluated by the double-crystal X-ray rocking curve. The transmission spectra were measured in the range of 300-800 nm at room temperature.

Growth and optical caracteristics of the CsI:Li scintillator crystal for use as radiation detector

“…Lithium doped CsI and pure CsI crystals were grown using the vertical Bridgman technique [10,11]. In the process, a number of parameters are involved, including the growth velocity, the furnace temperature profile, cleaning materials and the geometric configuration of the material from which the crucible is made are the major ones.…”

High Temperature Crystal Growth: An Overview

“…The Bridgemann technique is useful in preparation of crystals of metals and semiconductors, alkali and alkaline earth halides, and complex ternary fluorides of alkali and transition metals except to the materials, which expand on solidification like aluminium tungstate. Various laser crystals, such as PbMoO 4 and YbAl 3 (BO 3 ) 4 (YbAB) are grown by this method.…”

Synthesis of PbMoO4Using a Facile Surfactant-assisted Hydrothermal Method and Their Photocatalytic Activity

“…PbMoO4 산화물은 molybdates계에 속하는 회중석 구조(scheelite structure)를 가지고 있으며 광발광체, 고상 레이져, 광섬유, 섬광물질, 자성물질 및 촉매와 같은 넓은 분야에서 사용되고 있다 [1,2]. 또한 이 들은 Ca 와 같은 양이온이 A에 위치하면 이들은 회중석 구조를 가지는 것으로 알려져 있다.…”