【Chinatungsten】tungsten trioxide and calcium hydroxide reaction

Tungsten oxide is yellow powder with stable chemical property and anti acid ability. But it can be dissolved in alkali solution such as NaOH, KOH, Ca(OH)2 which will become tungstate.

Calcium hydroxide chemical formula is Ca(OH)2, it is white powder. Also called as slaked lime, hydrated lime. Tungsten trioxide and calcium hydroxide reaction is as following：

WO3+Ca(OH)2=CaWO4+H2O

Ca2WO4 is calcium tungstate which is also called artificial scheelite. It is important chemical raw material and mainly be used to produce APT, WO3, ferro tungsten, steel alloy, tungsten carbide, tungsten products, tungsten wire, tungsten alloy and other tungsten products. Besides that, other emerging industry such as fluorescent paint, screen pipe for shoot, X-ray and day light.

【Chinatungsten】tungsten-copper-sol-gel-method

Introduction

Tungsten copper sol gel method with hydrolysis and polymerization basic reaction, which are in preparation of high purity at a low temperature, evenly distributed, high chemical activity of single and multi-component mixtures. It is a metal alkoxide and its compounds as raw materials, under certain conditions hydrolysis medium and catalyst - the polycondensation reaction solution into a gel, and then by drying and heat treatment method of obtaining synthetic materials.

Processing

Compared with conventional sintering method, sol gel method products with high uniformity and high purity, the temperature is 400℃~500℃ lower than conventional sintering method, the reaction process is easy to control, can greatly reduce the side effects of the new phase formed. At the same time, this kind of method solve the mechanical mixing powder prepared tungsten copper composite powder particle size is too large, mechanical impurities, tungsten copper mixing uneven and other issues.

【Chinatungsten】tungsten trioxide target

Tungsten trioxide target is often used as the evaporation material of WO3 thin film. Producing process of tungsten trioxide target adopting electric ceramic, process is ball milling, compression moulding and calcination.

During the producing process, quality of raw material has determined effect on property of ceramic. Differences between functional ceramic and traditional ceramic are embodied in the control of raw material, grain size and distribution, reacting activity, crystalline and cost. The common tungsten trioxide target producing methods are solid phase method, vapor phase method and liquid phase method.

【Chinatungsten】Tungsten Carbide Rings Pros and Cons

I'm a Tungsten Man

Now, I have a new home at google. let's google home now.

I'm hanns come from China, I'm a wolfram man for I have been working for everything about tungsten(wolram) in the past 2 decades.

I hope may share my ideas and experiences here to anyone else interesting in Tungsten, carbide and/or alloy.