Ammonia-removing coated piezoelectric material synthesized from tourmaline powder and preparation method thereof

Abstract

An ammonia-removing coated piezoelectric material synthesized from tourmaline powder and a preparation method thereof are disclosed, wherein a material of an external coating piezoelectric shell comprises the tourmaline powder and clay in the mass ratio of (3-5) : 1, and an inner core is the clay; the preparation steps are as follows: taking the tourmaline powder and a clay raw material to purifyand remove large pieces of impurities, taking the purified tourmaline powder and clay raw material in which the large pieces of impurities are removed into a beaker in the mass ratio of (3-5) : 1, adding deionized water, stirring and mixing evenly for standby use; slowly adding the deionized water to the clay, molding the clay into the spherical clay inner core with a diameter of 2-3mm, quickly coating the surface of spherical clay inner core with the material of the external coating piezoelectric shell with a thickness of 1 to 2 mm to form a ball, immediately using a 0.5-mm-diameter needle for penetrating the ball from the center, naturally drying the prepared ball in air for 1 to 2 hours, dehydrating for forming, placing the formed ball into a tin foil with an upper opening, sending thetin foil to a muffle furnace and sintering at 560 DEG C for 4 hours to obtain the finished CPM (coated piezoelectric material). The finished CPM can achieve ammonia removal with no energy consumptionand secondary pollution.

Description

technical field [0001] The invention relates to the technical field of material development, in particular to a ammonia-removing coated piezoelectric material (CPM, Coated Piezoelectric Material) synthesized by tourmaline powder and a manufacturing method thereof. Background technique [0002] Tourmaline is a borosilicate mineral with a ring structure, which belongs to the trigonal crystal system and has pyroelectricity and piezoelectricity. When the temperature and pressure around the tourmaline crystal change, the charged particles therein undergo relative displacement, and the positive and negative charge centers are separated, resulting in the generation of polarized charges, so that there is an electrostatic field around the tourmaline crystal with the c-axis plane as the two poles. When tourmaline grains are extremely small, even ground into micron-sized powders, the interaction between tourmaline particles is equivalent to an electric dipole, and there is a maximum el...

AI Technical Summary

Problems solved by technology

However, the physical method fails to fundamentally remove ammonia and requires post-treatment. The chemical method is costly and difficult to control the operating conditions. The biological method has a long treatment cycle and is easily restricted by environmental factors such as pH value, dissolved oxygen concentration, temperature and other conditions.

Piezoelectric materials have the advantages of simple manufacture, low cost, and high energy conversion efficiency, and show great advantages in the oxidation and removal of ammonia due to their strong oxidative properties. The CPM made of tourmaline powder can make the environment more efficient without energy consumption. The ammonia in the medium is effectively removed without secondary pollution, and the overall cost is low, but there are few studies in this area at present

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