Fixed abrasive polishing pad and dry polishing method for deliquescent crystal lanthanum bromide

Abstract

The invention provides a fixed abrasive polishing pad and a dry polishing method for deliquescent crystal lanthanum bromide. The fixed abrasive polishing pad comprises a reactant, a catalyst, abrasive particles, a curing agent and a binding agent. According to the polishing method, the fixed abrasive polishing pad is used for polishing lanthanum bromide crystals and dry fixed abrasive polishing without liquid polishing media is adopted. The reactant and the lanthanum bromide crystals are subjected to a solid-phase chemical reaction under the action of the catalyst to generate a transition layer, the transition layer is removed under the mechanical action of the abrasive particles and the polishing pad, and a smooth surface can be obtained. The problems that the lanthanum bromide crystals can be easily dissolved in water and easily cracked after absorbing water in the polishing process are solved, the material utilization rate is high, the machining cost is low, the surface quality of the lanthanum bromide crystals is improved, chemical corrosion to polishing equipment by the liquid polishing media is avoided, and environmental pollution can be avoided.

Description

technical field [0001] The invention relates to an ultra-precision polishing processing technology, in particular to a fixed abrasive polishing pad and a polishing processing method of a functional crystal material lanthanum bromide, specifically a deliquescent functional crystal lanthanum bromide dry-type fixed abrasive Polishing method. Background technique [0002] Lanthanum bromide crystals have excellent properties such as high light output, excellent energy resolution and time resolution, and fast decay time. The indicators are better than the existing mainstream scintillation crystals, and their application prospects are huge. They are used in nuclear radiation detection, high-energy physics, and geological exploration. , medical imaging and other fields have important applications. The application of lanthanum bromide crystals requires high surface quality, and chemical mechanical polishing can effectively reduce surface roughness and improve surface quality. Becau...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that lanthanum bromide crystal is easily soluble in water and easy to deliquesce and crack when absorbing water, and provide a fixed abrasive polishing pad and a dry type fixed abrasive polishing method for deliquescent functional crystal lanthanum bromide. The pad contains reactants, catalysts, abrasive grains, curing agents and bonding agents. This method does not use liquid polishing media, and the reactants are consolidated into the polishing pad for chemical mechanical polishing. The reactants and crystals undergo a solid-phase chemical reaction to form a transition The layer is mechanically removed by the abrasive grains to prevent the abrasive grains from scratching the parent lanthanum bromide and ensure the surface quality of the crystal