Having a sound business enterprise credit score, outstanding after-sales assistance and modern producing facilities, we have now earned an exceptional name among our shoppers across the planet for High Quality China High Quality Pumice Stone Porous Lava Stone Volcanic Stone Price Flame Lavas Rocks, Our company has been devoting that “customer first” and committed to helping clients expand their organization, so that they become the Big Boss !
Having a sound business enterprise credit score, outstanding after-sales assistance and modern producing facilities, we have now earned an exceptional name among our shoppers across the planet for China Flame Lavas, Porous Lava Stone, Our company has built stable business relationships with many well-known domestic companies as well as oversea customers. With the goal of providing high quality products to customers at low cots, we are committed to improving its capacities in research, development, manufacturing and management. We have honored to receive recognition from our customers. Till now we have passed ISO9001 in 2005 and ISO/TS16949 in 2008. Enterprises of “quality of survival, the credibility of development” for the purpose, sincerely welcome domestic and foreign businessmen to visit to discuss cooperation.
Tourmaline is the general name of tourmaline group minerals. Its chemical composition is relatively complex. It is a ring structure silicate mineral characterized by boron containing aluminum, sodium, iron, magnesium and lithium. The hardness of tourmaline is usually 7-7.5, and its density is slightly different with different types. See the table below for details. Tourmaline is also known as tourmaline, tourmaline, etc.

Tourmaline has unique properties such as piezoelectricity, pyroelectricity, far-infrared radiation and negative ion release. It can be compounded with other materials by physical or chemical methods to produce a variety of functional materials, which are used in environmental protection, electronics, medicine, chemical industry, light industry, building materials and other fields.

Tourmaline’s own characteristics

Spontaneous polarity
When the temperature and pressure of tourmaline crystal change, the relative displacement between the charged particles in the crystal occurs, the positive and negative charge centers separate, and the total electric moment of the crystal changes, resulting in the generation of polarized charge. The spontaneous polarization effect of tourmaline shows that there is an electrostatic field with the c axis as the two poles around the tourmaline crystal. When the crystal size of tourmaline is very small, the effect of tourmaline particles is equivalent to an electric dipole. Due to the mutual cancellation of positive and negative charges, the electric field intensity is the largest in the direction parallel to the c axis. The spontaneous polarization effect of tourmaline is permanent, which is closely related to its structure and composition.

Piezoelectric, thermoelectric effect
Tourmaline has piezoelectricity effect and thermoelectricity effect at the same time. When the surrounding environment changes, the temperature or pressure changes, the crystal bond in the tourmaline lattice is twisted, and the electron is transferred, so that one end of tourmaline is positively charged and the other end is negatively charged. The opposite electrode is defined as C + and C -. C + is the positive pole compressed along the c-axis during cooling or pressurization, and C – is the negative pole expanded along the c-axis during heating or decompression.

Tourmaline rough
The single crystal or micro crystal directly mined from the mine agglomerates into a certain volume of massive tourmaline.
Size: from 0.5-2cm, 1-3cm, 3-5cm

Data sheet

Having a sound business enterprise credit score, outstanding after-sales assistance and modern producing facilities, we have now earned an exceptional name among our shoppers across the planet for High Quality China High Quality Pumice Stone Porous Lava Stone Volcanic Stone Price Flame Lavas Rocks, Our company has been devoting that “customer first” and committed to helping clients expand their organization, so that they become the Big Boss !
High Quality China Flame Lavas, Porous Lava Stone, Our company has built stable business relationships with many well-known domestic companies as well as oversea customers. With the goal of providing high quality products to customers at low cots, we are committed to improving its capacities in research, development, manufacturing and management. We have honored to receive recognition from our customers. Till now we have passed ISO9001 in 2005 and ISO/TS16949 in 2008. Enterprises of “quality of survival, the credibility of development” for the purpose, sincerely welcome domestic and foreign businessmen to visit to discuss cooperation.