Topic
Tridymite
About: Tridymite is a research topic. Over the lifetime, 840 publications have been published within this topic receiving 14831 citations.
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Patent•
26 Jun 2002
TL;DR: In this paper, a single crystal pulling up method was proposed to enable the control of oxygen concentration in a crystal so as not to exert adverse influence on the crystal growth without introducing novel equipment.
Abstract: PROBLEM TO BE SOLVED: To provide a quartz crucible for pulling up single crystal, a single crystal pulling up device and a single crystal pulling up method which enable the control of oxygen concentration in a crystal so as not to exert adverse influence on the crystal growth without introducing novel equipment. SOLUTION: This quartz crucible 4 for pulling up single crystal pulls up the silicon single crystal C from the stored silicon melt L and, therein, cristobalite 4a which contains tridymite is formed on the inside surface which is in contact with the silicon melt.
3 citations
TL;DR: In this paper, the phase formation regularities of trydimite-type solid solutions CsMg 1-x Me x PO 4 (Me = Mn, Co, Zn, Cu) were studied, and the dependences of the unit cell parameters on their compositions x were revealed.
3 citations
3 citations
Patent•
26 Oct 2006
TL;DR: In this paper, a tridymite refractory not damaged by abnormal volume expansion and showing improvement in production efficiency and utility efficiency is provided by using either used silica brick or rejected fired silica bricks.
Abstract: PROBLEM TO BE SOLVED: To provide a tridymite refractory not damaged by abnormal volume expansion and showing improvement in production efficiency and utility efficiency SOLUTION: Main starting materials which is either of used silica brick or rejected fired silica brick in each of which the main mineralogical phase comprises 70 mass% or more tridymite phase and below 30 mass% amorphous phase is compounded with 2 to 5 mass% portland cement and 8 to 22 mass% fumed silica to prepare a compounded raw material Water in an amount of 5 to 10 mass% is added to 100 mass% compounded raw material, and the mixture is molded The molding is dried by irradiation with microwaves at an output of 6 to 20 kW per ton of the molding to obtain a dried product To fire the dried product, it is heat-treated at 1,200°C or higher COPYRIGHT: (C)2007,JPO&INPIT
2 citations
TL;DR: A silica sample of chalk-like consistency, with grey flint embedded, from Headley Heath, Surrey, England, was found by quantitative X-ray diffraction to be almost pure quartz and almost identical to Cretaceous flint from Karlstrup, Denmark as discussed by the authors.
2 citations