This article introduces the change trend of impurity ions Fe 3+ and Mn 2+ in minerals which compose of glaze at raw and baked at different temperatures. Experiment results show that white glaze has a batch (aix strip)...This article introduces the change trend of impurity ions Fe 3+ and Mn 2+ in minerals which compose of glaze at raw and baked at different temperatures. Experiment results show that white glaze has a batch (aix strip) of overfine structure spectrum of Mn 2+ which pile up at the Fe 3+ spectrum at g =2. There is a Fe 3+ spectrum at g =4.3 as the baked temperature is higher while the Fe 3+ wide spectrum at g =2 intensities and Mn 2+ spectrum disappears. When temperature reaches 1300℃, the wide spectrum of Fe 3+ disappears but Fe 3+ spectrum at g = 4.3 intensities. Brown glaze at raw has no Mn 2+ spectrum,just has a wide spectrum at g =2. When the baked temperature is higher, the wide spectrum become narrower and intensities.展开更多
Kaolinite(and dickite)is dioctahedral 1:1 layer silicate.Owing to the influence ofdifferent geological conditions on the mineral during and after its formation,naturalkaolinite,in general,possesses different degrees o...Kaolinite(and dickite)is dioctahedral 1:1 layer silicate.Owing to the influence ofdifferent geological conditions on the mineral during and after its formation,naturalkaolinite,in general,possesses different degrees of internal structural order.Planconand Tchoubar(1977a,1977b),Tchoubar et al.(1982)established that the princi-pal type of disorder in natural kaolinite is the displacement of the vacant展开更多
Dolomite-marble is widely used as a high-grade building material.The color caused by impurities and its stability are important criteria to judge the quality of dolomite-marble and its value in the market.Therefore,th...Dolomite-marble is widely used as a high-grade building material.The color caused by impurities and its stability are important criteria to judge the quality of dolomite-marble and its value in the market.Therefore,the study of the relation between the color and the impurities is of important commercial significance.Up to now,no detailed study on dolomite-marble color has been reported.In this work the relation beween the color of dolomite-marble and the trace paramagnetic ions is studied in detail using electron paramagnetic resonance(EPR),X-ray diffraction,polished section identification and chemical analysis.展开更多
Nitrogen is a major impurity in diamond. Its content and existing form always arrest widespread attention. L.A. Shulman and G. A. Podziarey established existence of the nitrogen atom pair (s=1)in synthetic polycrystal...Nitrogen is a major impurity in diamond. Its content and existing form always arrest widespread attention. L.A. Shulman and G. A. Podziarey established existence of the nitrogen atom pair (s=1)in synthetic polycrystalline diamonds. An EPR spectrum of the pairs consists of two satellite lines a, situated at distance L = 16±0.5 G from central line of isolated nitrogen spectrum (H 11[100]) (Fig. 1(a)). Re-展开更多
文摘This article introduces the change trend of impurity ions Fe 3+ and Mn 2+ in minerals which compose of glaze at raw and baked at different temperatures. Experiment results show that white glaze has a batch (aix strip) of overfine structure spectrum of Mn 2+ which pile up at the Fe 3+ spectrum at g =2. There is a Fe 3+ spectrum at g =4.3 as the baked temperature is higher while the Fe 3+ wide spectrum at g =2 intensities and Mn 2+ spectrum disappears. When temperature reaches 1300℃, the wide spectrum of Fe 3+ disappears but Fe 3+ spectrum at g = 4.3 intensities. Brown glaze at raw has no Mn 2+ spectrum,just has a wide spectrum at g =2. When the baked temperature is higher, the wide spectrum become narrower and intensities.
文摘Kaolinite(and dickite)is dioctahedral 1:1 layer silicate.Owing to the influence ofdifferent geological conditions on the mineral during and after its formation,naturalkaolinite,in general,possesses different degrees of internal structural order.Planconand Tchoubar(1977a,1977b),Tchoubar et al.(1982)established that the princi-pal type of disorder in natural kaolinite is the displacement of the vacant
文摘Dolomite-marble is widely used as a high-grade building material.The color caused by impurities and its stability are important criteria to judge the quality of dolomite-marble and its value in the market.Therefore,the study of the relation between the color and the impurities is of important commercial significance.Up to now,no detailed study on dolomite-marble color has been reported.In this work the relation beween the color of dolomite-marble and the trace paramagnetic ions is studied in detail using electron paramagnetic resonance(EPR),X-ray diffraction,polished section identification and chemical analysis.
文摘Nitrogen is a major impurity in diamond. Its content and existing form always arrest widespread attention. L.A. Shulman and G. A. Podziarey established existence of the nitrogen atom pair (s=1)in synthetic polycrystalline diamonds. An EPR spectrum of the pairs consists of two satellite lines a, situated at distance L = 16±0.5 G from central line of isolated nitrogen spectrum (H 11[100]) (Fig. 1(a)). Re-
