our products

D&Q Mining is a high-tech company integrating R&D, production and sales. It provides mature products and solutions such as crushers, sand making, milling equipment, mobile crushing stations, etc., for aggregate, mining and waste recycling.

barium titanate invention

US5783165A Method of making barium titanate Google Patents

The present invention provides a new and improved method of making barium titanate powder. The method includes the steps of providing a solution comprising oxalic acid and titanium oxychloride, maintaining the solution at a predetermined temperature, adding barium carbonate to the solution thereby precipitating barium titanyl oxalate, and calcining the barium titanyl oxalate so as to provide

More

Barium Titanate an overview ScienceDirect Topics

Invention discloses method of barium titanate synthesis. 2 The invention uses a hydrothermal synthesis for preparing barium titanate for a multi-layer ceramic capacitors. The barium titanate of invention has high purity, particle size of submicron size,

More

KR101692332B1 Method of manufacturing barium titanate

The present invention relates to a preparation method of a barium titanate nanostructure. The preparation method of a barium titanate nanostructure comprises the following steps of: synthesizing a TiO3 precursor by dispersing a titanium dioxide (TiO2) powder in an alkaline solution; synthesizing a barium titanate nanostructure by adding an aqueous barium solution to the TiO3 precursor; and

More

Method of making barium titanate Ferro Corporation

The present invention provides a new and improved method of making barium titanate powder. The method includes the steps of providing a solution comprising oxalic acid and titanium oxychloride, maintaining the solution at a predetermined temperature, adding barium carbonate to the solution thereby precipitating barium titanyl oxalate, and calcining the barium titanyl oxalate so as to provide

More

History of Piezoelectricity PIEZO.COM

Development of the barium titanate family of piezoceramics and later the lead zirconate titanate family. established as the Barium Titanate Application Research Committee, in 1951. slow, even declining. Globally, however, there was still much pioneering research work taking place as well as device invention and patenting. CHAPTER 6.

More

Richard Weir & Carl Nelson: Barium-Titanate Ultra-Capacitor

Yet another aspect of the present invention is that the coating of aluminum oxide and calcium magnesium aluminosilicate glass on calcined composition-modified barium titanate powder provides many enhancement features and manufacturing capabilities to the basis material.

More

Barium Titanate Nanostructures and Thin Films for

Barium titanate (BaTiO 3) is a synthetic crystal used in electromechanical transducers and multilayer ceramic capacitors. Since it is not available in nature, a variety of growth methods has been employed to produce in large scale, with high quality and low‐cost. It was only with the invention of the laser, which generates coherent waves

More

Barium Titanate an overview ScienceDirect Topics

Barium titanate, BaTiO 3 [BT] [8,9], is the first-discovered ferroelectric oxide with perovskite structure. This ceramic has a relatively high electromechanical coupling factor, k 33 (~0.50), and a piezoelectric strain constant, d 33 (~190 pC/N), and has been partially used for

More

(PDF) History and Challenges of Barium Titanate: Part II

Barium titanate is the first ferroelectric ceramics and a good candidate for a variety of applications due to its excellent dielectric, ferroelectric and piezoelectric properties.

More

Methods for producing monodispersed particles of barium

The present invention is a low-temperature controlled method for producing high-quality, ultrafine monodispersed nanocrystalline microsphere powders of barium titanate and other pure or composite oxide materials having particles ranging from nanosized to micronsized particles. The method of the subject invention comprises a two-stage process.

More

T³ Technion Technology Transfer Production of barium

Barium titanate (BaTiO3) is one of the most important ceramic materials in electronics. As an intrinsic ferroelectric material it can be utilized for various applications like multilayer capacitors, grain boundary capacitors, low-temperature sensors and in thermistors (heat sensitive resistors).

More

Patent Issued for Modified Barium Titanate Foam Ceramic

In this invention, barium titanate foam ceramics with high dielectric constant and three-dimensional network are used as the skeleton, and the nano silver is in situ loaded on the foam ceramic skeleton through utilizing the strong adhesion and self-reducing property of dopamine, followed by reduction with the reduction agent, the preparation is

More

History of Piezoelectricity PIEZO.COM

Development of the barium titanate family of piezoceramics and later the lead zirconate titanate family. established as the Barium Titanate Application Research Committee, in 1951. slow, even declining. Globally, however, there was still much pioneering research work taking place as well as device invention and patenting. CHAPTER 6.

More

Richard Weir & Carl Nelson: Barium-Titanate Ultra-Capacitor

Yet another aspect of the present invention is that the coating of aluminum oxide and calcium magnesium aluminosilicate glass on calcined composition-modified barium titanate powder provides many enhancement features and manufacturing capabilities to the basis material.

More

Barium Titanate Nanostructures and Thin Films for

Barium titanate (BaTiO 3) is a synthetic crystal used in electromechanical transducers and multilayer ceramic capacitors. Since it is not available in nature, a variety of growth methods has been employed to produce in large scale, with high quality and low‐cost. It was only with the invention of the laser, which generates coherent waves

More

Disruptive Inventions in Electroceramics Scientific.Net

Disruptive inventions in electroceramics arose out of need for greatly improved properties or short-supply of existing materials, or, more importantly, serenpedity. In the case of ceramic capacitors, the key property of the material, dielectric constant, jumped from less than 10 (mica) to 100 (titania) to over 1000 (barium titanate ceramics) to over 10,000 (relaxor ferroelectrics) to over

More

EEStor Ultracapacitors: Battery Revolution begins with

Jul 10, 2008· Donors and acceptors form donor-acceptor complexes within the lattice structure of the barium-calcium-zirconium-titanate according to the invention. The dielectric ceramic compositions described by the '494 patent are just some of the many types of ceramic compositions that can be fabricated using the processes and techniques of the present

More

Condensed Matter Free Full-Text Kittel’s Brief

Charles Kittel has written a masterpiece book, “Introduction to Solid State Physics” (ISSP). He mentions in the chapter on ferroelectrics in detail that barium titanate is the typical displacive-type ferroelectric compound where the Ti4+ displacement develops a dipole moment, which has made a deep impression in our mind. The author’s group, however, has arrived at an alternative

More

A Practical Guide to ‘Free Energy’ Devices

One aspect of the present invention is that the materials used to produce the energy-storage unit, EESU, are not explosive, corrosive, or hazardous. The basis material, a high-permittivity calcined composition-modified barium titanate powder is an inert powder and is

More

ABSTRACT Title of dissertation: MOISTURE IN MULTILAYER

resulted in the invention of capacitors based on sintered 5 barium titanate (BaTiO 3) as the dielectric [26] [46] . It was 1941, and no one knew how profound this invention would turn out to be in the future. The crystalline barium titanate molecule (called the unit cell in

More

Ferroelectric Nanotubes NASA/ADS

We report the independent invention of ferroelectric nanotubes from groups in several countries. Devices have been made with three different materials: lead zirconate-titanate PbZr1-xTixO3 (PZT); barium titanate BaTiO3; and strontium bismuth tantalate SrBi2Ta2O9 (SBT). Several different deposition techniques have been used successfully, including misted CSD (chemical solution deposition) and

More