Bronze, types

When 0.4 < x < 0.53, an orthorhombic phase is observed in the AgxNb02+xFi.x system. This phase undergoes a phase transition at 900°C that leads to the formation of a tetragonal phase, which crystallizes in a tetragonal tungsten bronze-type structure with cell parameters a = 12.343 and c = 3.905 A. When 0.82 < x < 1, solid solutions based on AgNb03 were found, which crystallize in a perovskite-type structure. 

Fig. 40. Structure of MxMe02+xF/.x type compounds — tetragonal tungsten bronze- type structure.

LiNbC>3 type crystals and compounds that crystallize in a tungsten bronze-type structure. 

Copper bronze, type 3310, obtained from U. S. Bronze Powder Works, Inc., Flemington, New Jersey, was used. The use of some grades of copper powder leads to a considerably lower yield. 

A special case of distorted perovskite structures is reported of compounds KxFeF3 of the bronze type (243). There appear close relationships to the similar bronzes of tungsten, KxW03, which will not be discussed further in this paper. 

Strontium barium niobate is a single-crystal material with the tungsten bronze type of structure which is made by the Czochralski method but has yet to find a major use. It has relaxor characteristics of the type shown in Fig. 7.1 which give it a high pyroelectric coefficient and detectivity, but its high permittivity lowers the figure of merit l. ... 

Cubic (or pseudo-cubic) tungsten bronze type (intermediate between Re03 and perovskite)... 

So we have a production of varied bronze types—ceremonial vessels, mirrors, weapons, belt hooks, horse trappings, etc.— for over 1000 years in ancient China. This is followed by 2000 years of both original production and imitation, leading us up to the present. 

The program (TGPL78) and its associated subroutine (AX12) written in FORTRAN, are reproduced as Appendixes II and III. A computer-drawn flow chart of the program is shown in Appendix IV. In the computer memory we have a large file of our Chinese bronze analyses both for major and trace elements. Some additional data as to the bronze type, date, provenance, whether it has been dated by thermoluminescence, and what the lead isotope ratios are if measured are also in this file. For the 150 Chinese belt hooks which we have analyzed, we also include three lines of shape and typological data. 

Li3V04 [69,70]. Vanadium compounds formed in air within the range 0-50% Li20 are attributed to lithium-vanadium bronzes. Li +xV308 is a bronze-type compound in which a part of ions are reduced to V ... 

Figure 31 (a) Electron micrograph of a crystal of an intergrowth tungsten bronze phase in the K.WOa system. The structure consists of slabs of WOs-like structure five octahedra wide separated by strips of the hexagonal tungsten bronze type, (b) A drawing of the idealized structure of the crystal in (a)... 

According to Mioc et al. [13], Keggin s anions are transformed at about 600 °C in a new monophosphate bronze type compound PWgOae. The TG diagram shows that the decomposition takes place without appreciable weight loss. 

Fig. 63.—Aluminium Bronze, Type I. Allowod to cool in Furnace.

Fig. 66.—Variation in Mechanical Properties (Tensile and Impact) with Annealing Temperature. Cast Aluminium Bronze, Type I (Cu 90 %, A1 10 %).

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