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APT Calcination Method Producing Yellow Tungsten Oxide APT calcination method producing yellow tungsten oxide is calcinating APT in the air, after it reaches to certain temperature, the decomposed material is yellow tungsten oxide. When calcinating APT in the air, it will have different phase under different temperature. When it reaches 500℃, it converts to yellow tungsten oxide. The process of APT calcination was analyzed by differential thermal analysis (DSC) and X-ray diffraction (XRD). It was found that the phase change of APT in air was: When temperature is lower than 240℃, APT converts to AMT. When it reaches 300~350℃, it converts to amorphous substance (ammonium tungsten bronze). When it goes up to 400℃, hexagonal structure of WO3 is obtained. When it heats up to 500℃, triclinic crystalline model of yellow tungsten oxide is obtained. Besides that, ammonium paratungstate purity determines yellow tungsten oxide purity, also crystalline form. So control APT crystalline and purity will have ideal crystalline form and purity of yellow tungsten oxide.
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Yellow Tungstan Ocsaíd (YTO) Réamhrá Is ocsaíd saoirsithe Buí mín roinnte, púdar criostalach buí. Tá sé a tháirgtear trí róstadh paratungstate amóiniam ag teochtaí rialaithe dlúth a thiomáint as uisce agus amóinia. am cruinn agus rialú teochta a chinneadh, go mór, tréithe fisiciúla na ocsaíd saoirsithe buí. Tá ocsaíd tungstain Buí dhá dhath le haghaidh méid gráin éagsúla. Nuair a bhíonn an méid gráin na ocsaíd tungstain buí timpeall 1.5um, taispeánann sé an dath buí, agus nuair a bhíonn an méid gráin na ocsaíd tungstain buí timpeall 15um, taispeánann sé glas. Is é an mhaoin den chineál céanna. Modh táirgthe Is féidir le ocsaíd tungstain Yellow a tháirgeadh trí mhodh APT calcination, modh hydrothermal, modh calcination aigéad tungstic, modh deascadh, modh Sol-fhoirmiú, modh eibleacht micrea, modh pirealú spraeála, modh chéim gal agus modh malartaithe ian.