A method of forming particles that includes performing a strong force attenuation of a mixture to form pre-particles. The mixture including a base compound and a dielectric additive having an elevated dielectric constant dispersed therein. The pre-particles are then dielectrically spun in an electrostatic field to further attenuate the pre-particles and form the particles.

A method of forming particles that includes performing a strong force attenuation of a mixture to form pre-particles. The mixture including a base compound and a dielectric additive having an elevated dielectric constant dispersed therein. The pre-particles are then dielectrically spun in an electrostatic field to further attenuate the pre-particles and form the particles.

The present disclosure provides a novel glass filler that has a low permittivity and is suitable for mass production. A glass filler provided includes a glass composition that includes, in wt %, for example, 40SiO.sub.260, 25B.sub.2O.sub.345, 0<Al.sub.2O.sub.318, 0<R.sub.2O5, and 0RO12, and satisfies at least one of: i) SiO.sub.2+B.sub.2O.sub.380 and SiO.sub.2+B.sub.2O.sub.3+Al.sub.2O.sub.399.9; and ii) SiO.sub.2+B.sub.2O.sub.378, SiO.sub.2+B.sub.2O.sub.3+Al.sub.2O.sub.399.9, and 0<RO<10. Another glass filler provided includes a glass composition that includes SiO.sub.2, B.sub.2O.sub.3, Al.sub.2O.sub.3, R.sub.2O, and 3<RO<8 at the same contents as the above, and satisfies SiO.sub.2+B.sub.2O.sub.375 and SiO.sub.2+B.sub.2O.sub.3+Al.sub.2O.sub.3<97, where R.sub.2O=Li.sub.2O+Na.sub.2O+K.sub.2O and RO=MgO+CaO+SrO.

The present disclosure provides a novel glass filler that has a low permittivity and is suitable for mass production. A glass filler provided includes a glass composition that includes, in wt %, for example, 40SiO.sub.260, 25B.sub.2O.sub.345, 0<Al.sub.2O.sub.318, 0<R.sub.2O5, and 0RO12, and satisfies at least one of: i) SiO.sub.2+B.sub.2O.sub.380 and SiO.sub.2+B.sub.2O.sub.3+Al.sub.2O.sub.399.9; and ii) SiO.sub.2+B.sub.2O.sub.378, SiO.sub.2+B.sub.2O.sub.3+Al.sub.2O.sub.399.9, and 0<RO<10. Another glass filler provided includes a glass composition that includes SiO.sub.2, B.sub.2O.sub.3, Al.sub.2O.sub.3, R.sub.2O, and 3<RO<8 at the same contents as the above, and satisfies SiO.sub.2+B.sub.2O.sub.375 and SiO.sub.2+B.sub.2O.sub.3+Al.sub.2O.sub.3<97, where R.sub.2O=Li.sub.2O+Na.sub.2O+K.sub.2O and RO=MgO+CaO+SrO.

The present disclosure provides a novel glass filler that has a low permittivity and is suitable for mass production. A glass filler provided includes a glass composition that includes, in wt %, for example, 40SiO.sub.260, 25B.sub.2O.sub.345, 0<Al.sub.2O.sub.318, 0<R.sub.2O5, and 0RO12, and satisfies at least one of: i) SiO.sub.2+B.sub.2O.sub.380 and SiO.sub.2+B.sub.2O.sub.3+Al.sub.2O.sub.399.9; and ii) SiO.sub.2+B.sub.2O.sub.378, SiO.sub.2+B.sub.2O.sub.3+Al.sub.2O.sub.399.9, and 0<RO<10. Another glass filler provided includes a glass composition that includes SiO.sub.2, B.sub.2O.sub.3, Al.sub.2O.sub.3, R.sub.2O, and 3<RO<8 at the same contents as the above, and satisfies SiO.sub.2+B.sub.2O.sub.375 and SiO.sub.2+B.sub.2O.sub.3+Al.sub.2O.sub.3<97, where R.sub.2O=Li.sub.2O+Na.sub.2O+K.sub.2O and RO=MgO+CaO+SrO.

The present disclosure provides a novel glass filler that has a low permittivity and is suitable for mass production. A glass filler provided includes a glass composition that includes, in wt %, for example, 40SiO.sub.260, 25B.sub.2O.sub.345, 0<Al.sub.2O.sub.318, 0<R.sub.2O5, and 0RO12, and satisfies at least one of: i) SiO.sub.2+B.sub.2O.sub.380 and SiO.sub.2+B.sub.2O.sub.3+Al.sub.2O.sub.399.9; and ii) SiO.sub.2+B.sub.2O.sub.378, SiO.sub.2+B.sub.2O.sub.3+Al.sub.2O.sub.399.9, and 0<RO<10. Another glass filler provided includes a glass composition that includes SiO.sub.2, B.sub.2O.sub.3, Al.sub.2O.sub.3, R.sub.2O, and 3<RO<8 at the same contents as the above, and satisfies SiO.sub.2+B.sub.2O.sub.375 and SiO.sub.2+B.sub.2O.sub.3+Al.sub.2O.sub.3<97, where R.sub.2O=Li.sub.2O+Na.sub.2O+K.sub.2O and RO=MgO+CaO+SrO.